ADS1174IPAP [TI]
Contains all support circuitry needed for the ADS1174/ADS1274;
| 型号： | ADS1174IPAP |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | Contains all support circuitry needed for the ADS1174/ADS1274 |
| 文件： | 总48页 (文件大小：2677K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
User's Guide
SBAU134A–August 2008–Revised May 2009
ADS1174EVM, ADS1274EVM, ADS1174EVM-PDK, and
ADS1274EVM-PDK
Figure 1. ADS1274EVM (Left) and ADS1274EVM-PDK (Right)
This user's guide describes the characteristics, operation, and use of the ADS1174EVM and
ADS1274EVM, both by themselves and as part of the ADS1174EVM-PDK or ADS1274EVM-PDK. These
evaluation modules (EVMs) are evaluation boards for the ADS1274, a 24-bit multi-channel, delta-sigma
analog-to-digital converter (ADC), and the ADS1174, a 16-bit version of the ADS1274. The EVM allows
evaluation of all aspects of the ADS1174 or ADS1274 devices. Complete circuit descriptions, schematic
diagrams, and bills of material are included in this document.
The following related documents are available through the Texas Instruments web site at www.ti.com.
EVM-Compatible Device Data Sheets
Device
Literature Number
SBAS367B
Device
OPA1632
Literature Number
SBOS286A
ADS1274
ADS1174
REF5025
REF3125
OPA2350
SBAS373A
SN74LVC2G157
TPS73018
TPS65131
PCA9535
SCES207K
SBOS410
SBVS054H
SBVS046C
SBOS099C
SLVS493B
SCPS129H
ADCPro is a trademark of Texas Instruments.
Microsoft, Windows are registered trademarks of Microsoft Corporation.
SPI is a trademark of Motorola.
I2C is a trademark of NXP Semiconductors.
NI-VISA is a trademark of National Instruments.
All other trademarks are the property of their respective owners.
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Contents
1
2
3
4
5
6
7
8
EVM Overview ............................................................................................................... 3
Analog Interface.............................................................................................................. 4
Digital Interface .............................................................................................................. 4
Power Supplies .............................................................................................................. 6
Voltage Reference........................................................................................................... 7
Power-Down, Mode and Format Control ................................................................................. 8
Clock Source ................................................................................................................. 8
EVM Operation............................................................................................................... 9
ADS1274EVM-PDK Kit Operation ....................................................................................... 12
Evaluating Performance with the ADCPro Software................................................................... 24
Schematics and Layout.................................................................................................... 28
9
10
11
List of Figures
1
2
3
4
5
6
7
8
ADS1274EVM (Left) and ADS1274EVM-PDK (Right).................................................................. 1
Connector J2 ................................................................................................................. 5
Connectors J15, J16 ........................................................................................................ 7
Connector J1 ................................................................................................................. 7
Switch S1 ..................................................................................................................... 7
Jumper J19 ................................................................................................................... 9
Amplifier Selection Switches ............................................................................................... 9
ADS1274EVM Default Jumper Locations............................................................................... 11
MMB0 Initial Setup ........................................................................................................ 13
Connecting ADS1274EVM to MMB0 ................................................................................... 14
Connecting an AC Adapter ............................................................................................... 15
Laboratory Power-Supply Connection................................................................................... 16
NI-VISA Driver Installation ................................................................................................ 17
NI-VISA Driver Installation Question .................................................................................... 18
NI-VISA Driver Installing .................................................................................................. 18
NI-VISA Driver Complete Installation ................................................................................... 19
NI-VISA Driver Verification Using Device Manager ................................................................... 19
ADCPro Software Start-up Display Window ............................................................................ 20
ADS1274EVM-PDK Plug-In Display Window........................................................................... 21
Install New Driver Wizard Screen 1...................................................................................... 22
Install New Driver Wizard Screen 2...................................................................................... 22
Install New Driver Wizard Screen 3...................................................................................... 23
Install New Driver Wizard Screen 4...................................................................................... 23
Install New Driver Wizard Screen 5...................................................................................... 24
USBSytx Driver Verification Using Device Manager .................................................................. 24
Channel Enable............................................................................................................. 25
Manual Channel Control................................................................................................... 25
Clock Settings and Mode.................................................................................................. 26
Operating Mode ............................................................................................................ 26
Output Data Format........................................................................................................ 27
Progress Bar While Collecting Data ..................................................................................... 27
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
List of Tables
1
2
3
4
5
6
7
J9/J7:Analog Interface Pinout.............................................................................................. 4
J5: Serial Interface Pins..................................................................................................... 4
J3 Configuration: Power-Supply Input .................................................................................... 6
J15 +10V Selection.......................................................................................................... 6
J16 –10V Selection.......................................................................................................... 6
List of Switches............................................................................................................. 11
Operating Modes: Clock Frequency ..................................................................................... 26
2
ADS1174EVM, ADS1274EVM, ADS1174EVM-PDK, and ADS1274EVM-PDK
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8
EVM Overview
ADS1174EVM/ADS1274EVM Bill of Materials ......................................................................... 28
1
EVM Overview
1.1 Features
ADS1174EVM/ADS1274EVM Features:
•
•
•
•
•
•
Contains all support circuitry needed for the ADS1174/ADS1274
+10V and –10V generated from the +5V supply or supplied externally
Voltage reference options: external or onboard
Clock options: External clock source or 27MHz onboard crystal oscillator
GPIO access
Compatible with the TI Modular EVM System
ADS1174EVM-PDK/ADS1274EVM-PDK Features:
®
®
•
•
•
•
•
Easy-to-use evaluation software for Microsoft Windows XP
Data collection to text files
Built-in analysis tools including scope, FFT, and histogram displays
Complete control of board settings
Easily expandable with new analysis plug-in tools from Texas Instruments
For use with a computer, the ADS1174EVM-PDK or ADS1274EVM-PDK is available. This kit combines
the ADS1174EVM/ADS1274EVM board with the DSP-based MMB0 motherboard, and includes ADCPro™
software for evaluation.
The MMB0 motherboard allows the ADS1174EVM/ADS1274EVM to be connected to the computer via an
available USB port. This manual shows how to use the MMB0 as part of the
ADS1174EVM-PDK/ADS1274EVM-PDK, but does not provide technical details about the MMB0 itself.
ADCPro™ is a program for collecting, recording, and analyzing data from ADC evaluation boards. It is
based on a number of plug-in programs, so it can be expanded easily with new test and data collection
plug-ins. The ADS1174EVM-PDK/ADS1274EVM-PDK is controlled by a plug-in running in ADCPro. For
more information about ADCPro, see the ADCPro™ Analog-to-Digital Converter Evaluation Software
User's Guide (literature number SBAU128), available for download from the TI web site.
This manual covers the operation of both the ADS1174EVM/ADS1274EVM and the
ADS1174EVM-PDK/ADS1274EVM-PDK. Throughout this document, the abbreviation EVM and the term
evaluation module are synonymous with the ADS1174EVM and the ADS1274EVM. For clarity of reading,
the remainder of this manual will refer only to the ADS1274EVM or ADS1274EVM-PDK, but operation of
the EVM and kit for the ADS1174 is identical, unless otherwise noted.
1.2 Introduction
The ADS1274EVM is an evaluation module built to the TI Modular EVM System specification. It can be
connected to any modular EVM system interface card.
The ADS1274EVM is available as a stand-alone printed circuit board (PCB) or as part of the
ADS1274EVM-PDK, which includes an MMB0 motherboard and related software. As a stand-alone PCB,
the ADS1274EVM is useful for prototyping designs and firmware.
Note that the ADS1274EVM has no microprocessor and cannot run software. To connect it to a computer,
some type of interface is required.
SBAU134A–August 2008–Revised May 2009
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Analog Interface
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2
Analog Interface
For maximum flexibility, the ADS1274EVM is designed for easy interfacing to multiple analog sources.
Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin,
dual-row, header/socket combination at J9. This header/socket provides access to the analog input pins of
the ADS1274. Consult Samtec at http://www.samtec.com or call 1-800-SAMTEC-9 for a variety of mating
connector options. These signals can also be connected to the terminal block J7.
Most of the pins on J7 and J9 are directly connected, with no filtering or protection. Use appropriate
caution when handling these pins. Table 1 summarizes the pinouts for analog interfaces J9 and J7.
Table 1. J9/J7:Analog Interface Pinout
Pin Number
J9.1, J7-2
J9.2, J7-3
J9.3, J7-4
J9.4, J7-5
J9.5, J7-6
J9.6, J7-7
J9.7, J7-8
J9.8, J7-9
J9.18
Signal
A1N
Description
AINN1, ADS1274
AINP1, ADS1274
AINN2, ADS1274
AINP2, ADS1274
AINN3, ADS1274
AINP3, ADS1274
AINN4, ADS1274
AINP4, ADS1274
A1P
A2N
A2P
A3N
A3P
A4N
A4P
EXTREFN
External Reference source input
(– side of differential input)
J9.20
EXTREFP
External Reference source input
(+ side of differential input)
J9.10-16 (even)
J9.15
Unused
Unused
AGND
J9.9-19 (odd), J7-1
Analog ground connections (except J1.15)
3
Digital Interface
3.1 Serial Data Interface
The ADS1274EVM is designed to easily interface with multiple control platforms. Samtec part numbers
SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin, dual-row, header/socket
combination at J5. This header/socket provides access to the digital control and serial data pins of the
ADC. Consult Samtec at http://www.samtec.com or call 1-800-SAMTEC-9 for a variety of mating
connector options.
All logic levels on J5 are 3.3V CMOS, except for the I2C™ pins. These pins conform to 3.3V I2C rules.
Table 2 describes the J5 serial interface pins.
Table 2. J5: Serial Interface Pins
Pin No.
J5.1
Pin Name
CNTL
Signal Name
SYNC
I/O Type
Pullup
High
Function
In
In
In
J5.2
GPIO0
CLKX
MODE0
SCLK
High
J5.3
None
ADS1274 SPI™
clock
J5.4
J5.5
J5.6
J5.7
J5.8
DGND
CLKR
GPIO1
FSX
DGND
In/Out
Out
In
None
None
High
Low
Digital Ground
SCLK clock
CLKR
MODE1
/DRDY/FSYNC
FORMAT0
In/Out
In
GPIO2
High
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Digital Interface
Table 2. J5: Serial Interface Pins (continued)
Pin No.
Pin Name
FSR
Signal Name
/DRDY/FSYNC
DGND
I/O Type
In/Out
In/Out
In
Pullup
None
None
None
Function
J5.9
J5.10
J5.11
DGND
DX
Digital Ground
DIN
ADS1274 SPI data
in
J5.12
J5.13
J5.14
J5.15
J5.16
J5.17
GPIO3
DR
FORMAT1
DOUT1
In
High
None
None
None
n/a
Out
In
ADS1274 data out
GPIO4
/INT
FORMAT2
/DRDY/FSYNC
SCL
Out
I2C
In
SCL
I2C clock
TOUT
CLK
None
Can be used to
provide a clock from
a processor
J5.18
J5.19
J5.20
DGND
GPIO5
SDA
DGND
In/Out
I2C
None
None
n/a
Digital Ground
CLK Select
SDA
I2C data
Many pins on J5 have weak pull-up/pull-down resistors. These resistors provide default settings for many
of the control pins. Many pins on J5 correspond directly to ADS1274 pins. See the ADS1274 product data
sheet for complete details on these pins.
3.2 Data Output
Most data communications are directed through DOUT1. The data from all eight channels can be
observed on the DOUT1 pin using the TDM mode. That is the signal used by the ADS1274EVM-PDK to
read back and display all the channels. All the data output signals (DOUT1 to DOUT4) can be monitored
on J2. Figure 2 illustrates the pinout for J2.
Figure 2. Connector J2
SBAU134A–August 2008–Revised May 2009
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Power Supplies
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4
Power Supplies
J3 is the power-supply input connector. Table 3 lists the configuration details for J3. Analog inputs to the
ADC can be applied directly to the device (see Section 8.1, Analog Input), bypassing the onboard
amplifiers, and in this case only +5V and +3.3V are required to power the EVM. If the amplifiers are used,
an additional bipolar supply is needed to power them. The EVM includes a switching power supply to
generate a +10V and –10V supply. For optimum noise performance, the external supplies (+VA and –VA)
should be used.
Table 3. J3 Configuration: Power-Supply Input
Pin No.
Pin Name
Function
Required
J3.1
+VA
+10V to +15V
Yes, unless onboard +10V is
used.
J3.2
–VA
–10V to –15V
Yes, unless onboard –10V is
used.
J3.3
J3.4
J3.5
J3.6
J3.7
J3.8
J3.9
J3.10
+5VA
+5V analog supply
–5V analog supply
Digital ground input
Analog ground input
1.8V digital supply
3.3V digital supply
Not used
Always
–5VA
No
DGND
AGND
+1.8VD
+3.3VD
VD1
Yes
Yes
No
Always
No
+5VD
+5V
Used to generate +10V/–10V
The 1.8V for DVDD comes from the voltage regulator U16 using 3.3V as the source voltage input.
All of the power supplies AVDD (+5V), DVDD (1.8V), and IOVDD (3.3V) have corresponding jumpers J10,
J11(AVDD), J13(DVDD) and J14(IOVDD) that can be replaced with a current meter to measure the
respective supply currents.
4.1 Bipolar Power Options
J15 and J16 require a jumper to select the voltage used by the onboard amplifiers. The external voltages
can range from 10V to 15V. The onboard voltage is always 10V. Table 4 and Table 5 list the options for
J15 and J16, respectively. Figure 3 shows the pinout for connectors J15 and J16.
Table 4. J15 +10V Selection
Jumper
Name
Function
1-2 (OB)
+10V
Select the +10V that is generated on the
EVM
2-3 (EXT)
+VA
Select the external +VA voltage
Table 5. J16 –10V Selection
Jumper
Name
Function
1-2
–10V
Select the –10V that is generated on the
EVM
2-3
–VA
Select the external –VA voltage
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Voltage Reference
Figure 3. Connectors J15, J16
5
Voltage Reference
The ADS1274EVM has three sources for the reference voltage. Jumper J1 can select the voltage from
either the REF3125(U1) or REF5025(U2). The reference from either source is filtered and buffered by
U3A. Switch S1 chooses either the onboard reference or the external reference voltage that is connected
to the reference pins of J9. Figure 4 illustrates the pinout for connector J1. Figure 5 shows switch S1 as it
appears on the EVM.
Figure 4. Connector J1
Figure 5. Switch S1
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Power-Down, Mode and Format Control
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Power-Down, Mode and Format Control
The ADS1274 has several pins to control power-down of individual channels, and mode and format for the
digital interface. These pins are controlled on the EVM either through software or hardware (using
switches S10 and S11).
For users of the ADS1274EVM as a stand-alone module, these pins may be pulled high or low through
DIP switches S10 and S11. Refer to the ADS1274 product data sheet for complete details on these pins
and which state sets which options.
For use in the ADS1274EVM-PDK, the state of these pins is controlled by software, using the I2C port
expander on the EVM. When used in the ADS1274EVM-PDK, DIP switches S10 and S11 must all be
switched so that they are down, toward the center of the board. The ADS1274EVM-PDK software will
check at startup to verify that these switches are set correctly, and will generate an error message if they
are not. However, it cannot detect if the switches are changed after startup.
CAUTION
When using the EVM as part of the ADS1274EVM-PDK, DIP switches S10 and
S11 must all be switched so that they are down, toward the center of the board.
Failure to do so may damage the EVM.
7
Clock Source
The ADS1274 clock can come from one of several sources: the onboard 27MHz crystal oscillator, a clock
supplied by a processor on the TOUT pin (J5.17), or an external clock source connected to J18.1 (ground)
and J18.2 (signal).
If the onboard 27MHz oscillator is selected, the device can be run in the high-speed mode, the
high-resolution mode, the low-power mode, or low-speed mode with CLKDIV set to 1. If the performance
of the device must be explored with CLKDIV set to 0 in the low-power and low-speed modes, an external
clock must be provided to the board, either using the TOUT connection or having an external clock source
connected to J18. The same is true if frequencies other than the 27MHz provided by the onboard oscillator
must be investigated.
7.1 Usage in PDK
If using the ADS1274EVM as part of the ADS1274EVM-PDK, J19 should not have any pins shorted.
Remove any shorting blocks on jumper J19. The ADS1274EVM-PDK software will allow selection of the
clock source under software control (this option is accomplished by using port 05 of the I2C expander
U17). The software allows selection of the onboard 27MHz oscillator, or a clock provided by a PLL on the
MMB0 which directly drives the appropriate CLK pins of the interface, or an external, customer supplied
clock. If an external clock is selected with the software, this clock must be provided on J18. Note that if the
external clock is selected and no clock is provided, the software may hang waiting for data from the
converter.
7.2 Usage as a Stand-Alone EVM
If using the EVM in your own system and not with the PDK hardware and software, observe the following
recommendations:
•
J17 should be removed if the external clock source is used and the TOUT pin is still driven by a
processor in order to avoid conflicts.
•
Jumper J19 can be used to always select the 27MHz crystal (IOVDD position) or allow the
onboard/external clock selection to be controlled by GPIO5 (J5.19) as shown in Figure 6.
8
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EVM Operation
Figure 6. Jumper J19
8
EVM Operation
The following section provides information on the analog input, digital control, and general operating
conditions of the ADS1274EVM.
8.1 Analog Input
The analog input sources (channels 1-4) can be applied directly to J9 (top or bottom side) or through
signal-conditioning modules available for the the modular EVM system. Terminal block J7 is connected in
parallel with the analog signal connections to J9.
Each input signal can be selected to connect directly to the analog inputs of the ADS1274 or they can use
the OPA1632 buffers that are provided. Switches S2-5 can be switched away from the ADS1274 to select
the Terminal Block (TBK) or towards the ADS1274 to select the Amplifier (AMP) for the analog inputs 1
through 4 as shown in Figure 7.
Figure 7. Amplifier Selection Switches
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8.2 Digital Control
The digital control signals can be applied directly to J5 (top or bottom side). The modular ADS1274EVM
can also be connected directly to a DSP or microcontroller interface board, such as the 5-6KINTERFACE
or HPA-MCUINTERFACE boards available from Texas Instruments, or the MMB0 if purchased as part of
the ADS1274EVM-PDK. For a list of compatible interface and/or accessory boards for the EVM or the
ADS1274, see the relevant product folder on the TI web site. Some of the digital signals are controlled
directly with pins on J5. Other signals such as the Power Down controls can only be controlled with slide
switches or by U17 and U18 that are set up and read using the I2C signals on pins 16 and 18 of J5. The
Format and Mode pins can be controlled by all three methods (slide switches, GPIO pins on J5, and the
I2C control from U17).
The ADS1274 allows the serial interface to be used in two different formats: an SPI-compatible mode and
a frame-sync format. Switch S12 can be used to switch between these two formats. The left position,
marked SPI, selects the SPI format. In this format, the signals are connected in this configuration:
•
•
The SCLK input of the converter is driven by the serial port signal CLKX, pin J5.3.
The signal from the selected source for the clock (see Section 7, Clock Source) is connected to the
CLKR pin (J5.5) allowing the serial port of a processor to be synchronized to the converter master
clock.
•
•
The signal from the selected clock source is routed to the CLK input of the converter.
Port P10 of the I2C port expander U18 is connected to a logic high level, so that the position of switch
S12 can be read back by software.
The right position of S12, marked FS, selects the frame-sync format. In this format, the signals are
connected in this configuration:
•
•
The SCLK input of the converter is driven by the serial port signal CLKR, pin J5.5.
The signal from the selected clock source is connected to the CLKX pin (J5.3), allowing the serial port
of a processor to be synchronized to the converter master clock.
•
•
The CLK input of the converter is driven by the CLKR signal (J5.5). This connection ensures that the
CLK and SCLK signals have the same phase and the correct ratio as outlined in the data sheet of the
device.
Port P10 of the I2C port expander U18 is connected to a logic low level, so that the position of switch
S12 can be read back by software.
For use in the ADS1274EVM-PDK, S12 must be in the right (FS) position, which is the default factory
setting.
Switching to SPI format will allow the EVM to connect to any SPI-compatible processor that does not
support the frame-sync mode. If this format is selected, keep in mind that the high-speed mode will not
work at full speed (32.768MHz) because of the limitations outlined in the device product data sheet.
8.3 ADS1274EVM-PDK Power Supply
The ADS1274EVM can either be powered by an AC adapter or by applying the 5V, +10V and –10V to the
connectors on the MMB0 board. The MMB0 board will provide the 5V and 3.3V to the ADS1274EVM
along with the +10V and –10V signals. Because the circuitry is provided on the ADS1274EVM to generate
+10V and –10V, the complete system can be powered from the supplied AC adapter that supplies +6V
and 3A.
10
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EVM Operation
8.4 Default Jumper Settings and Switch Positions
Figure 8 shows the jumpers found on the EVM and the respective factory default conditions for each.
Figure 8. ADS1274EVM Default Jumper Locations
Table 6 lists the switches found on the EVM and the respective factory default conditions for each.
Table 6. List of Switches
Switch
S1
Default Position
Switch Description
Left
Left
Onboard Reference
S2–S4
AIN2–4 Terminal Block (amplifiers
bypassed)
S5
Down
Right
AIN1 Terminal Block (amplifiers bypassed)
Frame-sync format
S12
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ADS1274EVM-PDK Kit Operation
This section provides information on using the ADS1274EVM-PDK, including setup, program installation,
and program usage.
To prepare to evaluate the ADS1274 with the ADS1274EVM-PDK, complete the following steps:
Step 1. Install the ADCPro software (if not already installed) on a PC.
Step 2. Install the ADS1274EVM-PDK EVM plug-in software.
Step 3. Set up the ADS1274EVM-PDK.
Step 4. Connect a proper power supply or use the included AC adapter.
Step 5. Complete the NI-VISA™ USB driver installation process.
Step 6. Run the ADCPro software.
Step 7. Complete the Microsoft Windows USB driver installation process.
Each task is described in the subsequent sections of this document.
9.1 Installing the ADCPro Software
CAUTION
Do not connect the ADS1274EVM-PDK before installing the software on a
suitable PC. Failure to observe this caution may cause Microsoft Windows to
not recognize the ADS1274EVM-PDK.
The latest software is available from the TI website at www.ti.com/. The CD-ROM shipped with the
ADS1274EVM may not contain the latest software, but the ADCPro installer will check for updates when
executed (if connected to the Internet), and then give you the option of downloading and installing the
latest version. Refer to the ADCPro User Guide for instructions on installing and using ADCPro.
To install the ADS1274EVM-PDK plug-in, run the file: ads1274evm-pdk-plugin-1.0.0.exe (1.0.0 is the
version number, and increments with software version releases: you may have a different version on your
CD). Double-click the file to run it; then follow the instructions shown. You can also utilize the ADCPro
Update Check feature to check for newer versions of the ADS1274EVM-PDK plug-in, once you have
installed one version of it.
The software should now be installed, but the USB drivers may not yet have been loaded by the PC
operating system. This step will complete when the ADCPro software is executed; see Section 9.4,
Running the Software and Completing Driver Installation.
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ADS1274EVM-PDK Kit Operation
9.2 Setting Up the ADS1274EVM-PDK
The ADS1274EVM-PDK contains both the ADS1274EVM and the MMB0 motherboard; however, the
devices are shipped unconnected. Follow these steps to set up the ADS1274EVM-PDK.
Step 1. Unpack the ADS1274EVM-PDK kit.
Step 2. Set the jumpers and switches on the MMB0 as shown in Figure 9.
•
•
•
•
Set the Boot Mode switch to USB.
Connect +5V and +5VA on jumper block J13 (if +5V is supplied from J14 +5VA).
Leave +5V and +VA disconnected on jumper block J13.
If the PDK will be powered from an AC adapter, connect J12. If the PDK will be powered
through the terminal block, disconnect J12. (See Section 9.3 for details on connecting the
power supply.)
Figure 9. MMB0 Initial Setup
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space
Step 3. Plug the ADS1274EVM into the MMB0 as Figure 10 illustrates.
Figure 10. Connecting ADS1274EVM to MMB0
CAUTION
Do not misalign the pins when plugging the ADS1274EVM into the MMB0.
Check the pin alignment carefully before applying power to the PDK.
Step 4. Set the jumpers and switches on the ADS1274EVM as shown in Figure 7 (note that these
settings are the factory-configured settings for the EVM). Note that the default configuration
for the EVM is to use external ±10V supplies for the input amplifiers.
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ADS1274EVM-PDK Kit Operation
9.2.1
About the MMB0
The MMB0 is a Modular EVM System motherboard. It is designed around the TMS320VC5507 , a DSP
with an onboard USB interface from Texas Instruments. The MMB0 also has 16MB of SDRAM installed.
The MMB0 is not sold as a DSP development board, and it is not available separately. TI cannot offer
support for the MMB0 except as part of an EVM kit. For schematics or other information about the MMB0,
contact Texas Instruments.
9.3 Connecting the Power Supply
The ADS1274EVM-PDK can be operated with a unipolar +5V supply or a combination of +5V and bipolar
±(10V to 15V) supply.
When the MMB0 DSP is powered properly, LED D2 glows green. The green light indicates that the 3.3V
supply for the MMB0 is operating properly. (It does not indicate that the EVM power supplies are
operating properly.)
9.3.1
Connecting an AC Adapter
An AC adapter can be connected to barrel jack J2 on the MMB0. J2 is located next to the USB connector.
The adapter must output 6V to 7V dc. The connector must be sleeve-negative, tip-positive. It should have
a current rating of at least 2A.
Jumper J12 on the MMB0 connects a wall-mounted power supply to the board. To use the wall-mount
supply, J12 must be shorted. Figure 11 illustrates how to connect an AC adapter to the MMB0.
Figure 11. Connecting an AC Adapter
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9.3.2
Connecting a Laboratory Power Supply
A laboratory power supply can be connected through terminal block J14 on the MMB0, as shown in
Figure 12. Both unipolar and bipolar configurations are supported.
To use a unipolar lab power supply configuration:
•
•
•
Disconnect J12 on the MMB0.
Connect a +5V dc supply to the +5VD terminal on J14.
Connect ground of the dc supply to the GND terminal on J14.
For bipolar mode, also connect a –10V dc supply to the –VA, and +10V on the +VA terminals on J14.
It is not necessary to connect a +5V dc supply voltage to the +5VA terminal on J14 if the +5V/+5VA
position on J13 is shorted.
Figure 12. Laboratory Power-Supply Connection
9.4 Running the Software and Completing Driver Installation
Note: The software is continually under development. These instructions and screen images are
current at the time of this writing, but may not exactly match future releases.
The program for evaluating the ADS1274EVM-PDK is called ADCPro. This program uses plug-ins to
communicate with the EVM. The ADS1274EVM-PDK plug-in is included in the ADS1274EVM-PDK
package.
The program currently runs only on Microsoft Windows platforms of Windows XP; Windows Vista is NOT
supported.
If this is the first time installing ADCPro and plug-ins, follow these procedures to run ADCPro and
complete the necessary driver installation. Make sure the ADCPro software and device plug-in software
are installed from the CD-ROM as described in Section 9.1.
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ADS1274EVM-PDK Kit Operation
9.4.1
NI-VISA USB Device Driver Installation
1. After the ADCPro software is installed, apply power to the PDK and connect the board to an available
PC USB port.
2. The computer should recognize new hardware and begin installing the drivers for the hardware.
Figure 13 through Figure 16 are provided for reference to show the installation steps.
•
For the first screen, Figure 13, it is not necessary to search for the software; it has already been
installed to your PC.
•
For the remaining steps, accept the default settings.
Figure 13. NI-VISA Driver Installation
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Figure 14. NI-VISA Driver Installation Question
Figure 15. NI-VISA Driver Installing
18
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Figure 16. NI-VISA Driver Complete Installation
This should complete the installation of the NI-VISA drivers. You can verify proper installation by opening
the Device Manager and locating as shown in Figure 17.
Figure 17. NI-VISA Driver Verification Using Device Manager
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9.4.2
USBStyx Driver Installation
Step 1. Start the software by selecting ADCPro from the Windows Start menu. The screen in
Figure 18 appears.
Figure 18. ADCPro Software Start-up Display Window
Step 2. Select ADS1274EVM from the EVM drop-down menu. The ADS1274EVM-PDK plug-in
appears in the left pane, as shown in Figure 19.
20
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ADS1274EVM-PDK Kit Operation
Figure 19. ADS1274EVM-PDK Plug-In Display Window
Step 3. The ADS1274EVM-PDK plug-in window has a status area at the top of the screen. When the
plug-in is first loaded, the plug-in searches for the board. You will see a series of messages
in the status area indicating this action.
Step 4. If you have not yet loaded the operating system drivers, Windows will display the Windows
Install New Driver Wizard sequence (illustrated in Figure 20 through Figure 24). Accept the
default settings.
Note: During the driver installation, a message may appear indicating the firmware load has TIMED
OUT. Click OK and continue driver installation. The plug-in will attempt to download the
firmware again once the driver installation completes.
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Figure 20. Install New Driver Wizard Screen 1
Figure 21. Install New Driver Wizard Screen 2
22
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Figure 22. Install New Driver Wizard Screen 3
Figure 23. Install New Driver Wizard Screen 4
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Figure 24. Install New Driver Wizard Screen 5
Step 5. Once Windows finishes installing the software driver, the plug-in downloads the firmware to
the MMB0. The status area will display Connected to EVM when the device is connected and
ready to use. If the firmware does not load properly, you can try resetting the MMB0 by
pressing reset and then reloading the plug-in.
Step 6. You can verify the proper installation of the USBStyx driver using the Device Manager. Note
that the first driver item, NI-VISA USB Devices, will disappear and a new item, LibUSB-Win32
Devices will appear, as Figure 25 shows.
Figure 25. USBSytx Driver Verification Using Device Manager
The driver installation wizard sequence should not appear again, unless you connect the board to a
different USB port.
10
Evaluating Performance with the ADCPro Software
The evaluation software is based on ADCPro, a program that operates using a variety of plug-ins. (The
ADS1274EVM plug-in is installed as described in the installation section, .)
To use ADCPro, load an EVM plug-in and a test plug-in. To load an EVM plug-in, select it from the EVM
menu. To load a test plug-in, select it from the Test menu. To unload a plug-in, select the Unload option
from the corresponding menu.
24
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Evaluating Performance with the ADCPro Software
Only one of each kind of plug-in can be loaded at a time. If you select a different plug-in, the previous
plug-in is unloaded.
10.1 Using the ADS1274EVM-PDK Plug-in
The ADS1274EVM-PDK plug-in for ADCPro provides complete control over all settings of the ADS1274. It
consists of a tabbed interface (see Figure 19), with different functions available on different tabs. These
controls are described in this section.
You can adjust the ADS1274EVM settings when it is not acquiring data. During acquisition, all controls are
disabled and settings may not be changed.
When you change a setting on the ADS1274EVM plug-in, the setting immediately updates on the board.
Settings on the ADS1274EVM correspond to settings described in the ADS1274 product data sheet; see
the ADS1274 data sheet for details.
Because the effective data rate of the ADS1274 depends upon settings of the Clock Freq and Operating
Mode, the Data Rate indicator in the upper right corner of the plug-in interface is always visible and
updates whenever a setting changes that affects the data rate.
10.1.1 Channel Enable Tab
The ADS1274 can acquire from one to four channels simultaneously. The Channel Enable tab (as shown
in Figure 26) provides the control to turn each channel on or off.
Figure 26. Channel Enable
In addition, the Manual Control button (shown in Figure 27) can be used to enable or disable all the
channels.
Figure 27. Manual Channel Control
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10.1.2 Settings Tab
The ADS1274 requires a clock to operate. The maximum frequency is selected for the different operating
modes, as shown in Table 7.
Table 7. Operating Modes: Clock Frequency
Operating Mode
High-Speed
High-Resolution
Low-Power
CLKDIV
Frequency (MHz)
32.768
27
1
0
1
0
27
Low-Power
13.5
27
Low-Speed
Low-Speed
5.4
If the PLL is selected as the clock source, a frequency can be entered in the Clock Frequency box; the
software will find the closest frequency that is possible for the PLL to synthesize (and which is within the
maximum allowable frequency for the mode selected) and will set the clock to that frequency, as well as
display the actual frequency used in the Clock Frequency box once focus has moved from that control.
Figure 28. Clock Settings and Mode
The Operating Mode control (illustrated in Figure 29) can select from High-Speed, High-Resolution,
Low-Power, or Low-Speed.
Figure 29. Operating Mode
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The CLKDIV control can be selected to be 0 or 1. The Data Output Formats are limited to the Frame
Sync, TDM Format, but both Dynamic and Fixed Mode can be selected. Figure 30 shows the output data
format options.
Figure 30. Output Data Format
10.1.3 Collecting Data
Once you have configured the ADS1274 for your test scenario, press the ADCPro Acquire button to start
the collection of the number of datapoints specified in the Test plug-in Block Size control. The
ADS1274EVM-PDK plug-in disables all the front panel controls while acquiring, and displays a progress
bar as shown in Figure 31.
Figure 31. Progress Bar While Collecting Data
For more information on testing analog-to-digital converters in general and using ADCPro and Test
plug-ins, refer to the ADCPro User Guide.
10.2 Troubleshooting
If ADCPro stops responding while the ADS1274EVM-PDK is connected, try unplugging the power supply
from the PDK. Unload and reload the plug-in before reapplying power to the PDK.
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Schematics and Layout
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11
Schematics and Layout
Schematics for the ADS1174EVM and ADS1274EVM are appended to this user's guide. The bill of
materials is provided in Table 8.
11.1 Bill of Materials
Note: All components should be compliant with the European Union Restriction on Use of
Hazardous Substances (RoHS) Directive. Some part numbers may be either leaded or
RoHS. Verify that purchased components are RoHS-compliant. (For more information about
TI's position on RoHS compliance, see the Texas Instruments web site.)
Table 8. ADS1174EVM/ADS1274EVM Bill of Materials
Item
No.
Qty
Value
Ref Des
Description
Vendor
Part Number
1
6
47
R39-R45. R44, Resistor, Thick Film Chip 47 Ω,
Panasonic
ERJ-3GEYJ470V
R45
5%, 1/10W, Size = 0603
2
16
1
49.9
100
R36, R46,
R56-R69
Resistor, Thick Film Chip 49.9 Ω,
1%, 1/16W, Size = 0603
Panasonic
Panasonic
Panasonic
Panasonic
ERJ-3EKF49R9V
ERJ-3GEYJ101V
ERJ-3EKF1001V
ERJ-3GEYJ202V
ERJ-3EKF4221V
ERJ-3GEYJ103V
ERJ-3GEYJ473V
ERJ-3GEYJ104V
ERJ-3GEYJ154V
ERJ-3GEYJ474V
MCR10EZHF1104
MCR10EZHF1244
745C101104JPTR
GRM1885C1H6R2DZ01D
C1608C0G1H152JT
C1608C0G1H222JT
C1608X7R1H472KT
C1608X7R1H103KT
C1608X7R1H104KT
3
R37
R2-R19
R38
Resistor, Thick Film Chip 100 Ω,
5%, 1/10W, Size = 0603
4
18
1
1K
Resistor, Thick Film Chip 1 kΩ,
1%, 1/16W, Size = 0603
5
2K
Resistor, Thick Film Chip 2 kΩ,
5%, 1/10W, Size = 0603
6
1
4.22K
10K
R71
Resistor, Thick Film Chip 4.22 kΩ, Panasonic
1%, 1/16W, Size = 0603
7
3
R50, R51, R70 Resistor, Thick Film Chip 10 kΩ,
Panasonic
Panasonic
5%, 1/10W, Size = 0603
9
1
47K
R47
R1,R72
R53, R54
R48, R49
R52
Resistor, Thick Film Chip 47 kΩ,
5%, 1/10W, Size = 0603
10
11
12
13
14
15
16
17
18
19
20
21
2
100K
150K
470K
1.1M
1.24M
100K
6.2pF
1.5nF
2.2nF
4.7nF
10nF
0.1 µF
Resistor, Thick Film Chip 100 kΩ, Panasonic
5%, 1/10W, Size = 0603
2
Resistor, Thick Film Chip 150 kΩ, Panasonic
5%, 1/10W, Size = 0603
2
Resistor, Thick Film Chip 470 kΩ, Panasonic
5%, 1/10W, Size = 0603
1
Resistor, Thick Film Chip 1.1 MΩ, Rohm
5%, 1/8W, Size = 0805
1
R55
Resistor, Thick Film Chip 1.24 MΩ, Rohm
5%, 1/8W, Size = 0805
2
RA1, RA2
C28, C29
C36-C43
C17-C20
C33
Resistor, Chip Array 10 Terminal
Bus 100 kΩ, 5%, 1/16W, SMD
CTS
2
Capacitor, C0G Ceramic 6.2 pF
±0.5pF, 50WV, Size = 0603
Murata
8
Capacitor, C0G Ceramic 1500 pF TDK
±5%, 50WV, Size = 0603
4
Capacitor, C0G Ceramic 2200
pF±5%, 50WV, Size = 0603
TDK
TDK
TDK
TDK
1
Capacitor, X7R Ceramic 4700 pF
±10%, 50WV, Size = 0603
3
C32, C34, C76 Capacitor, X7R Ceramic 0.01 µF
±5%, 50WV, Size = 0603
28
C4-C12, C26, Capacitor, X7R Ceramic 0.1 µF
C52-C63,
C77-C80, C83,
C84
±10%, 50WV, Size = 0603
28
ADS1174EVM, ADS1274EVM, ADS1174EVM-PDK, and ADS1274EVM-PDK
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Schematics and Layout
Table 8. ADS1174EVM/ADS1274EVM Bill of Materials (continued)
Item
No.
Qty
Value
Ref Des
Description
Vendor
Part Number
22
1
0.15 µF
C3
Capacitor, X7R Ceramic 0.15 µF
±10%, 25WV, Size = 0603
TDK
TDK
TDK
TDK
C1608X7R1E154KT
23
24
25
26
27
28
29
30
1
1
2
1
5
2
1
1
0.22 µF
0.47 µF
1 µF
C35
C1
Capacitor, X7R Ceramic 0.22 µF
±10%, 16WV, Size = 0603
C1608X7R1C224KT
C1608X5R1A474KT
C1608X7R1C105KT
GRM21BR61C475KA88L
C3216X5R1C106MT
C3225X5R1C226MT
C3225X5R0J107MT
Capacitor, X5R Ceramic 0.47 µF
±10%, 10WV, Size = 0603
C27, C81
C25
Capacitor, X7R Ceramic 1 µF
±10%, 16WV, Size = 0603
4.7 µF
10 µF
Capacitor, X7R Ceramic 4.7 µF
±10%, 6.3WV, Size = 0805
Murata
TDK
C21-C24, C82 Capacitor, X5R Ceramic 10 µF
±20%, 16WV, Size = 1206
22 µF
C30, C31
Capacitor, X5R Ceramic 22 µF
±20%, 16WV, Size = 1210
TDK
100 µF
C2
Capacitor, X5R Ceramic 100 µF
±20%, 6.3WV, Size = 1210
TDK
U4
Precision Delta-Sigma ADC, 4
Differential Input
Texas
Instruments
ADS1274IPAP
(ADS1274EVM) or
ADS1174IPAP
(ADS1174EVM)
31
32
33
34
35
36
35
36
37
38
1
1
1
4
1
1
1
1
1
2
U2
U3
Precision Voltage Reference, 2.5V Texas
Instruments
REF5025ID
Operational Amplifier, Dual
Precision Voltage Reference
Fully-Differential Amplifier
Single, Inverter
Texas
Instruments
OPA2350EA
U1
Texas
Instruments
REF3125AIDBZ
OPA1632DGN
U8-U11
U19
Texas
Instruments
Texas
SN74LVC1G04DBVR
SN74LVC2G74DCTR
SN74LVC2G157DCT
TPS73018DBV
TPS65131RGET
PCA9535RGE
Instruments
U20
Single, D Flip-Flop
Texas
Instruments
U6
Single, 2-Line to 1 Data
Selector/Multiplexer
Texas
Instruments
U16
LDO Voltage Regulator, 1.8 V, 200 Texas
mA
Instruments
U5
Dual output 800-mA DC/DC Switch Texas
boost converter
Instruments
U17, U18
16-Bit I2C I/O Expander
Texas
Instruments
39
39
40
41
42
43
44
46
47
1
1
2
2
1
1
2
3
4
U21
U7
EEPROM, 1.8V, 256K
3.3-V Oscillator
Microchip
CTS
24AA256-I/ST
27 MHz
CB3LV-3I-27M0000
TSM-110-01-L-DV-P
SSW-110-22-F-D-VS-K
TSM-105-01-L-DV-P
SSW-105-22-F-D-VS-K
TSW-102-07-L-D
J5A, J9A
J5B, J9B
J3A
20-pin SMT Plug
Samtec
Samtec
Samtec
Samtec
Samtec
Samtec
Samtec
20-pin SMT Socket
10-pin SMT Plug
J3B
10-pin SMT Socket
Header Strip, 4-pin ( )
Header Strip, 2-pin ( )
Header Strip, 4-pin ( )
J2, J6
J4, J17, J18
TSW-102-07-L-S
J1, J15, J16,
J19
TSW-103-07-L-S
48
1
J7
Terminal Block 3.5-mm 9-Position On Shore
PCB Technology
ED555/9DS
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Table 8. ADS1174EVM/ADS1274EVM Bill of Materials (continued)
Item
No.
Qty
Value
Ref Des
Description
Vendor
Texas
Instruments
Part Number
49
1
N/A
ADS1274EVM or ADS1174EVM
PWB
6492532 or 6496219
50
2
D1, D2
Schottky Diode, 20V, 1A
ON
MBRM120LT1G
Semiconductor
51
52
5
2
J10-J14
L1, L2
Bus Wire (18-22 Gauge)
Inductor, 4.7 µH, 1.8 A, 6x6mm,
EPCOS
B82462G4472M
SMD
53
54
55
56
56
5
1
1
1
1
S1-S5
S10
Switch, Mini Slide, DPDT
NKK
C&K
C&K
SS22SDP2
DIP Switch, Half-Pitch, 8-Position
DIP Switch, Half-Pitch, 6-Position
4PDT Slide Switch, Top Actuator
TDA08H0SB1
TDA06H0SB1
S11
S12
Tyco/Alcoswitch MMS42
TP8
PCB Test Point, Large Loop,
Through-hole
Keystone
Electronics
5011
57
7
N/A
Shorting Blocks
Samtec
SNT-100-BK-G-H
30
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1
2
3
4
5
6
REVISION HISTORY
ENGINEERING CHANGE NUMBER
APPROVED
R38
2K
AVDD
REFP
REFN
S1
U1
IN
C3
1
3
2
OUT
C21
GND
150nF
10uF
AVDD
U18
PCA9535RGE
C1
0.47uF
REF3125AIDBZ
C4
0.1uF
U3A
IOVDD
SW-DPDT
C79
7
8
9
10
11
12
24
23
22
21
20
19
P06
P07
GND
P10
P11
P12
A2
A1
INT
VCC
SDA
SCL
R39
47
IOVDD
AVDD
D
C
B
A
0.1uF
D
C
B
A
IOVDD RA1
S10
2
3
1
2
3
4
8
7
6
5
1
C12
0.1uF
S11
DIPSWITCH-6
R2
1K
J12
OPA2350
RA2
100K
DIPSWITCH-4
C2
100uF
TP2 TP3
TP5
TP6
TP7
TP11
J1
JPR-1X3
C6
0.1uF
100K
AVDD
U2
VIN
TEMP
GND
R1
IOVDD
2
3
4
6
5
VOUT
TRIM
100K
C81
1uF
C82
10uF
REF5025
U4
ADS1174IPAP
J5
SYNC
SCLK
1
3
5
7
9
11
13
15
17
19
2
4
6
8
10
12
14
16
18
20
CNTL
CLKX
CLKR
FSX
FSR
DX
DR
INT
TOUT
GPIO5
GPIO0
S12
DGND
GPIO1
GPIO2
DGND
GPIO3
GPIO4
SCL
AVDD
J6
U3B
6
5
ALC_MMS42
1
3
2
4
7
R41
47
J10
49
50
51
52
32
NC
NC
NC
NC
FORMAT0
FORMAT1
FORMAT2
OPA2350
R40
47
31
30
29
C5
0.1uF
IOVDD
DRDY/FSYNC
DGND
SDA
SheetB
SheetB.Sch
SN74LVC2G74DCTR
C83
53
54
55
56
28
27
SN74LVC1G04DBV
2
DVDD
AVDD
AGND
VCOM
VREFP
SCLK
CLK
SERIALHDR
4
J13
C7
0.1uF
R42
47
AINP4
AINN4
0.1uF
AP4
26
25
24
23
22
21
1
2
U19
U20
J5A (TOP) = SAM_TSM-110-01-L-DV-P
J5B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K
DVDD
DGND
DGND
IOVDD
IOVDD
DGND
J14
IOVDD
2
C17
57
58
59
60
C10
0.1uF
1
2.2nF C0G
VREFN
AGND
AGND
AVDD
AN4
2
1
5
3
C8
0.1uF
D
Q
Q
C11
0.1uF
R49
CLK
U17
470K
J18
TP4
AINP3
AINN3
AP3
AN3
AINP4
AINN4
AINP3
AINN3
61
62
63
64
20
19
18
17
AINP4
AINN4
AINP3
AINN3
DOUT1
DOUT2
DOUT3
DOUT4
IOVDD
7
24
23
22
21
20
19
C18
2
8
1
9
P06
P07
GND
P10
P11
P12
A2
A1
2.2nF C0G
DOUT
INT
EXT CLK
D1 10
D2 11
D3 12
VCC
SDA
SCL
J19
1
2
3
R47
47K
AINP2
AINN2
AP2
AN2
J2
IOVDD
C19
D2
D4
JPR-1X3 EXT
C78
2.2nF C0G
TP8
GND
2
4
1
3
GPIO5
IOVDD
U6
0.1uF
DOUT
8
5
3
7
6
U7
IOVDD
4
2
VCC A/B
1
2
4
1
3
C34
10 nF
AINP1
AINN1
GND
Y
Y
G
A
B
EOH
OUT
VCC
GND
AP1
AN1
OBCLK
R48
470K
PCA9535RGE
C20
GND
C27
1uF
CTS_CB3LV-3I-27.0000-T
2.2nF C0G
SN74LVC2G157DCT
DVDD
R44
IOVDD
U16
AVDD
J11
47
1
3
2
5
4
IN
EN
OUT
NR
1
2
+10V
IOVDD
IOVDD
C23
10uF
TP9
+10V
R45
47
R72
GND
C77
0.1uF
+VA
C9
0.1uF
100k
TPS73018DBV
C76
RA3
10nF
100K
R50
10K
J15
TP1
R3
1K
R52
1.1M
J20
U21
IOVDD
VA+
C28
6.2 pF
C30
22 uF 16V
1
2
3
7
8
1
3
5
2
4
6
A0
A1
A2
WP
VCC
5
R70
10K
R53
SDA
6
+VA
-VA
C84
0.1uF
D1
R71
4.22K
SCL
4
150K
EPC_B82462-G4472-M
L1
C80
0.1uF
GND
HEADER-3X2
J3
MCP_24LC256-I/ST
AVDD
1
3
5
7
9
2
4
6
8
+VA
-VA
MBRM120
C29
6.2 pF
R51
10K
R55
J4
JPR-2X1
+5VA
-5VA
AGND
VD1
U5
INP
INP
BSW
INN
C25
4.7 uF
C35
0.22 uF
R54
150K
IOVDD
DGND
+1.8VD
+3.3VD
1
24
7
5
6
4
8
9
10
11
19
12
23
22
17
16
15
13
14
21
18
2
C24
10uF
VPOS
FBP
VREF
FBN
VNEG
OUTN
OUTN
CP
10
-10V
+5VD
TP10
-10V
1.24M
C22
10uF
POWERHDR
D2
-VA
INN
VIN
R37
100
ti
6730 SOUTH TUCSON BLVD., TUCSON, AZ 85706 USA
J3A (TOP) = SAM_TSM-105-01-L-DV-P
J3B (BOTTOM) = SAM_SSW-105-22-F-D-VS-K
ENP
PSP
ENN
PSN
AGND
NC
DATA ACQUISITION PRODUCTS
J16
C31
22 uF 16V
MBRM120
L2
EPC_B82462-G4472-M
HIGH-PERFORMANCE ANALOG DIVISION
SEMICONDUCTOR GROUP
CN
VA-
C32
PGND
PGND
NC
10 nF
3
20
C33
4.7 nF
C26
0.1uF
TITLE
ENGINEER RUSSELL ANDERSON
DRAWN BY RUSSELL ANDERSON
DOCUMENT CONTROL NO. 6496220
ADS1174EVM
TPS65131RGE
SIZE
B
DATE 29 AUG 2008
REV
B
SHEET
1
OF
2
FILE
1
2
3
4
5
6
1
2
3
4
5
6
REVISION HISTORY
ENGINEERING CHANGE NUMBER
REV
APPROVED
1K
C36
1.5nF C0G
U8
R4
D
C
B
A
D
C
B
A
+10V
C52
0.1uF
R5
S2
8
1
3
CHAN-P4
CHAN-N4
49.9
+
R56
5
2
4
ANP4
ANN4
1K
-
VOCM
+
6
R6
1K
R57 49.9
C53
-
SW-DPDT
OPA1632
C37
C54
CM
1K
C38
R8
VCOM
0.1uF
0.1uF
-10V
+10V
C55
1.5nF C0G
1.5nF C0G
R7
1K
0.1uF
U9
R9
1K
8
1
3
49.9
+
-
R58
S3
5
2
4
CHAN-P3
CHAN-N3
-
ANP3
ANN3
VOCM
+
6
R10
1K
R59 49.9
C56
OPA1632
C39
SW-DPDT
C57
0.1uF
0.1uF
-10V
ANP4
ANN4
ANP3
1.5nF C0G
R11
1K
1K
C40
1.5nF C0G
U10
R12
ANN3
+10V
C58
J7
0.1uF
R13
1K
S4
8
1
3
CHAN-P2
CHAN-N2
49.9
+
R60
5
2
4
ANP2
ANN2
-
VOCM
+
6
R14
1K
R61 49.9
C59
-
SW-DPDT
CHAN-P4
CHAN-N4
CHAN-P3
CHAN-N3
CHAN-P2
CHAN-N2
CHAN-P1
CHAN-N1
AP4
AN4
AP3
AN3
AP2
AN2
AP1
AN1
OPA1632
C60
0.1uF
0.1uF
-10V
C41
TERMBLOCK-MINI-9
1.5nF C0G
R15
ANP2
ANN2
ANP1
ANN1
1K
1K
C42
R16
+10V
C61
1.5nF C0G
0.1uF
U11
+
R17
1K
S5
8
1
3
CHAN-P1
CHAN-N1
49.9
R62
J9
5
2
4
ANP1
ANN1
-
1
2
4
6
8
VOCM
AN0-
3
AN0+
+
6
AN1-
5
AN1+
AN2+
AN3+
AN4+
AN5+
AN6+
AN7+
REF-
R18
1K
R63 49.9
C62
AN2-
7
-
SW-DPDT
AN3-
9
OPA1632
10
12
14
16
18
20
AGND
11
C63
0.1uF
AGND
13
0.1uF
-10V
C43
AGND
15
VCOM
17
REFN
REFP
AGND
19
1.5nF C0G
AGND
REF+
R19
ANALOGHDR
1K
J9A (TOP) = SAM_TSM-110-01-L-DV-P
J9B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K
ti
6730 SOUTH TUCSON BLVD., TUCSON, AZ 85706 USA
DATA ACQUISITION PRODUCTS
HIGH-PERFORMANCE ANALOG DIVISION
SEMICONDUCTOR GROUP
TITLE
SIZE
ENGINEER RUSSELL ANDERSON
DRAWN BY RUSSELL ANDERSON
DOCUMENT CONTROL NO. 6496220
ADS1174EVM
B
DATE 29 AUG 2008
REV
B
SHEET
2
OF
2
FILE
1
2
3
4
5
6
1
2
3
4
5
6
REVISION HISTORY
ENGINEERING CHANGE NUMBER
APPROVED
R38
2K
AVDD
REFP
REFN
S1
U1
IN
C3
1
3
2
OUT
C21
GND
150nF
10uF
AVDD
U18
PCA9535RGE
C1
0.47uF
REF3125AIDBZ
C4
0.1uF
U3A
IOVDD
SW-DPDT
C79
7
8
9
10
11
12
24
23
22
21
20
19
P06
P07
GND
P10
P11
P12
A2
A1
INT
VCC
SDA
SCL
R39
47
IOVDD
AVDD
D
C
B
A
0.1uF
D
C
B
A
IOVDD RA1
S10
2
3
1
2
3
4
8
7
6
5
1
C12
0.1uF
S11
DIPSWITCH-6
R2
1K
J12
OPA2350
RA2
100K
DIPSWITCH-4
C2
100uF
TP2 TP3
TP5
TP6
TP7
TP11
J1
JPR-1X3
C6
0.1uF
100K
AVDD
U2
VIN
TEMP
GND
R1
IOVDD
2
3
4
6
5
VOUT
TRIM
100K
C81
1uF
C82
10uF
REF5025
U4
ADS1274IPAP
J5
SYNC
SCLK
1
3
5
7
9
11
13
15
17
19
2
4
6
8
10
12
14
16
18
20
CNTL
CLKX
CLKR
FSX
FSR
DX
DR
INT
TOUT
GPIO5
GPIO0
S12
DGND
GPIO1
GPIO2
DGND
GPIO3
GPIO4
SCL
AVDD
J6
U3B
6
5
ALC_MMS42
1
3
2
4
7
R41
47
J10
49
50
51
52
32
NC
NC
NC
NC
FORMAT0
FORMAT1
FORMAT2
OPA2350
R40
47
31
30
29
C5
0.1uF
IOVDD
DRDY/FSYNC
DGND
SDA
SheetB
SheetB.Sch
SN74LVC2G74DCTR
C83
53
54
55
56
28
27
SN74LVC1G04DBV
2
DVDD
AVDD
AGND
VCOM
VREFP
SCLK
CLK
SERIALHDR
4
J13
C7
0.1uF
R42
47
AINP4
AINN4
0.1uF
AP4
26
25
24
23
22
21
1
2
U19
U20
J5A (TOP) = SAM_TSM-110-01-L-DV-P
J5B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K
DVDD
DGND
DGND
IOVDD
IOVDD
DGND
J14
IOVDD
2
C17
57
58
59
60
C10
0.1uF
1
2.2nF C0G
VREFN
AGND
AGND
AVDD
AN4
2
1
5
3
C8
0.1uF
D
Q
Q
C11
0.1uF
R49
CLK
U17
470K
J18
TP4
AINP3
AINN3
AP3
AN3
AINP4
AINN4
AINP3
AINN3
61
62
63
64
20
19
18
17
AINP4
AINN4
AINP3
AINN3
DOUT1
DOUT2
DOUT3
DOUT4
IOVDD
7
24
23
22
21
20
19
C18
2
8
1
9
P06
P07
GND
P10
P11
P12
A2
A1
2.2nF C0G
DOUT
INT
EXT CLK
D1 10
D2 11
D3 12
VCC
SDA
SCL
J19
1
2
3
R47
47K
AINP2
AINN2
AP2
AN2
J2
IOVDD
C19
D2
D4
JPR-1X3 EXT
C78
2.2nF C0G
TP8
GND
2
4
1
3
GPIO5
IOVDD
U6
0.1uF
DOUT
8
5
3
7
6
U7
IOVDD
4
2
VCC A/B
1
2
4
1
3
C34
10 nF
AINP1
AINN1
GND
Y
Y
G
A
B
EOH
OUT
VCC
GND
AP1
AN1
OBCLK
R48
470K
PCA9535RGE
C20
GND
C27
1uF
CTS_CB3LV-3I-27.0000-T
2.2nF C0G
SN74LVC2G157DCT
DVDD
R44
IOVDD
U16
AVDD
J11
47
1
3
2
5
4
IN
EN
OUT
NR
1
2
+10V
IOVDD
IOVDD
C23
10uF
TP9
+10V
R45
47
R72
GND
C77
0.1uF
+VA
C9
0.1uF
100k
TPS73018DBV
C76
RA3
10nF
100K
R50
10K
J15
TP1
R3
1K
R52
1.1M
J20
U21
IOVDD
VA+
C28
6.2 pF
C30
22 uF 16V
1
2
3
7
8
1
3
5
2
4
6
A0
A1
A2
WP
VCC
5
R70
10K
R53
SDA
6
+VA
-VA
C84
0.1uF
D1
R71
4.22K
SCL
4
150K
EPC_B82462-G4472-M
L1
C80
0.1uF
GND
HEADER-3X2
J3
MCP_24LC256-I/ST
AVDD
1
3
5
7
9
2
4
6
8
+VA
-VA
MBRM120
C29
6.2 pF
R51
10K
R55
J4
JPR-2X1
+5VA
-5VA
AGND
VD1
U5
INP
INP
BSW
INN
C25
4.7 uF
C35
0.22 uF
R54
150K
IOVDD
DGND
+1.8VD
+3.3VD
1
24
7
5
6
4
8
9
10
11
19
12
23
22
17
16
15
13
14
21
18
2
C24
10uF
VPOS
FBP
VREF
FBN
VNEG
OUTN
OUTN
CP
10
-10V
+5VD
TP10
-10V
1.24M
C22
10uF
POWERHDR
D2
-VA
INN
VIN
R37
100
ti
6730 SOUTH TUCSON BLVD., TUCSON, AZ 85706 USA
J3A (TOP) = SAM_TSM-105-01-L-DV-P
J3B (BOTTOM) = SAM_SSW-105-22-F-D-VS-K
ENP
PSP
ENN
PSN
AGND
NC
DATA ACQUISITION PRODUCTS
J16
C31
22 uF 16V
MBRM120
L2
EPC_B82462-G4472-M
HIGH-PERFORMANCE ANALOG DIVISION
SEMICONDUCTOR GROUP
CN
VA-
C32
PGND
PGND
NC
10 nF
3
20
C33
4.7 nF
C26
0.1uF
TITLE
ENGINEER RUSSELL ANDERSON
DRAWN BY RUSSELL ANDERSON
DOCUMENT CONTROL NO. 6492533
ADS1274EVM
TPS65131RGE
SIZE
B
DATE 29 AUG 2008
REV
B
SHEET
1
OF
2
FILE
1
2
3
4
5
6
1
2
3
4
5
6
REVISION HISTORY
ENGINEERING CHANGE NUMBER
REV
APPROVED
1K
C36
1.5nF C0G
U8
R4
D
C
B
A
D
C
B
A
+10V
C52
0.1uF
R5
S2
8
1
3
CHAN-P4
CHAN-N4
49.9
+
R56
5
2
4
ANP4
ANN4
1K
-
VOCM
+
6
R6
1K
R57 49.9
C53
-
SW-DPDT
OPA1632
C37
C54
CM
1K
C38
R8
VCOM
0.1uF
0.1uF
-10V
+10V
C55
1.5nF C0G
1.5nF C0G
R7
1K
0.1uF
U9
R9
1K
8
1
3
49.9
+
-
R58
S3
5
2
4
CHAN-P3
CHAN-N3
-
ANP3
ANN3
VOCM
+
6
R10
1K
R59 49.9
C56
OPA1632
C39
SW-DPDT
C57
0.1uF
0.1uF
-10V
ANP4
ANN4
ANP3
1.5nF C0G
R11
1K
1K
C40
1.5nF C0G
U10
R12
ANN3
+10V
C58
J7
0.1uF
R13
1K
S4
8
1
3
CHAN-P2
CHAN-N2
49.9
+
R60
5
2
4
ANP2
ANN2
-
VOCM
+
6
R14
1K
R61 49.9
C59
-
SW-DPDT
CHAN-P4
CHAN-N4
CHAN-P3
CHAN-N3
CHAN-P2
CHAN-N2
CHAN-P1
CHAN-N1
AP4
AN4
AP3
AN3
AP2
AN2
AP1
AN1
OPA1632
C60
0.1uF
0.1uF
-10V
C41
TERMBLOCK-MINI-9
1.5nF C0G
R15
ANP2
ANN2
ANP1
ANN1
1K
1K
C42
R16
+10V
C61
1.5nF C0G
0.1uF
U11
+
R17
1K
S5
8
1
3
CHAN-P1
CHAN-N1
49.9
R62
J9
5
2
4
ANP1
ANN1
-
1
2
4
6
8
VOCM
AN0-
3
AN0+
+
6
AN1-
5
AN1+
AN2+
AN3+
AN4+
AN5+
AN6+
AN7+
REF-
R18
1K
R63 49.9
C62
AN2-
7
-
SW-DPDT
AN3-
9
OPA1632
10
12
14
16
18
20
AGND
11
C63
0.1uF
AGND
13
0.1uF
-10V
C43
AGND
15
VCOM
17
REFN
REFP
AGND
19
1.5nF C0G
AGND
REF+
R19
ANALOGHDR
1K
J9A (TOP) = SAM_TSM-110-01-L-DV-P
J9B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K
ti
6730 SOUTH TUCSON BLVD., TUCSON, AZ 85706 USA
DATA ACQUISITION PRODUCTS
HIGH-PERFORMANCE ANALOG DIVISION
SEMICONDUCTOR GROUP
TITLE
SIZE
ENGINEER RUSSELL ANDERSON
DRAWN BY RUSSELL ANDERSON
DOCUMENT CONTROL NO. 6492533
ADS1274EVM
B
DATE 29 AUG 2008
REV
B
SHEET
2
OF
2
FILE
1
2
3
4
5
6
EVALUATION BOARD/KIT IMPORTANT NOTICE
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES
ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have
electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental
measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does
not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling
(WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.
Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from
the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER
AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive.
TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or
services described herein.
Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. This
notice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/or
safety programs, please contact the TI application engineer or visit www.ti.com/esh.
No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or
combination in which such TI products or services might be or are used.
FCC Warning
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES
ONLY and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radio
frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules, which are
designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may
cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may
be required to correct this interference.
EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of 3.3V to 5V and the output voltage range of 0V to 5V.
Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions
concerning the input range, please contact a TI field representative prior to connecting the input power.
Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM.
Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification,
please contact a TI field representative.
During normal operation, some circuit components may have case temperatures greater than 30°C. The EVM is designed to operate
properly with certain components above 85°C as long as the input and output ranges are maintained. These components include but are
not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified
using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation,
please be aware that these devices may be very warm to the touch.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2009, Texas Instruments Incorporated
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,
and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should
obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are
sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard
warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where
mandated by government requirements, testing of all parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and
applications using TI components. To minimize the risks associated with customer products and applications, customers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,
or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information
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warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual
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Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied
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TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably
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Following are URLs where you can obtain information on other Texas Instruments products and application solutions:
Products
Amplifiers
Applications
Audio
Automotive
Broadband
Digital Control
Medical
Military
Optical Networking
Security
amplifier.ti.com
dataconverter.ti.com
www.dlp.com
www.ti.com/audio
Data Converters
DLP® Products
DSP
Clocks and Timers
Interface
www.ti.com/automotive
www.ti.com/broadband
www.ti.com/digitalcontrol
www.ti.com/medical
www.ti.com/military
www.ti.com/opticalnetwork
www.ti.com/security
www.ti.com/telephony
www.ti.com/video
dsp.ti.com
www.ti.com/clocks
interface.ti.com
logic.ti.com
power.ti.com
microcontroller.ti.com
www.ti-rfid.com
Logic
Power Mgmt
Microcontrollers
RFID
Telephony
Video & Imaging
Wireless
RF/IF and ZigBee® Solutions www.ti.com/lprf
www.ti.com/wireless
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2009, Texas Instruments Incorporated
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