MAX9694EVKIT+ [MAXIM]
Lead-Free and RoHS Compliant;型号: | MAX9694EVKIT+ |
厂家: | MAXIM INTEGRATED PRODUCTS |
描述: | Lead-Free and RoHS Compliant |
文件: | 总12页 (文件大小:486K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
19-4313; Rev 0; 10/08
MAX9694 Evaluation Kit
Evluates:MAX694
General Description
Features
The MAX9694 evaluation kit (EV kit) demonstrates the
MAX9694 reference voltage generator for gamma cor-
rection in TFT-LCD panels, such as those found in high-
resolution TVs, high-end monitors, or for general
industrial reference voltage generation. The MAX9694
EV kit provides 14 programmable reference voltage
outputs (DAC outputs), four static buffered reference
voltage outputs (reference outputs), and a 7-bit digital
o 14 8-Bit Programmable Reference Voltages (DAC
Outputs)
o Four Static Buffered Reference Voltages
(Reference Outputs)
o Programmable V
Voltage Calibration
COM
o 400mA Peak Current on Reference Outputs and
DAC Outputs 1, 7, 8, and 14
variable reference (DVR) for V
voltage calibration.
COM
The EV kit can use a 9V to 20V DC power supply for
powering the application circuit.
o 200mA Peak Current on DAC Outputs 2–6 and 9–13
o Peak Output Currents
400mA: 4 DAC Outputs and 4 DAC Reference
Outputs
2
The EV kit features a USB-to-I C interface circuit.
®
®
Windows 2000/XP- and Windows Vista -compatible
software, with a graphical user interface (GUI), is avail-
able for exercising the MAX9694 features. The EV kit
200mA: 10 DAC Outputs
2
can also connect to a user-supplied I C interface cir-
cuit for stand-alone MAX9694 operation.
o 9V to 20V DC Power-Supply Operation
2
o USB-Powered USB-to-I C Interface Circuit
o Windows 2000/XP/Vista (32-Bit)-Compatible Software
o Lead-Free and RoHS Compliant
o Proven PCB Layout
Ordering Information
PART
TYPE
MAX9694EVKIT+
EV Kit
o Fully Assembled and Tested
+Denotes lead-free and RoHS compliant.
Component List
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
Not installed, ceramic capacitors
(0603)
3300pF 10ꢀ, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H332K or
TDK C1608X7R1H332K
C1–C18
0
C37
1
2
3
0.1μF 10ꢀ, 25V X7R ceramic
capacitors (0603)
Murata GRM188R71E104K or
TDK C1608X7R1E104K
C19, C21, C23,
C25, C27–C34,
C40, C41, C42
15
22pF 5ꢀ, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H220J or
TDK C1608C0G1H220J
C38, C39
10μF 10ꢀ, 10V X7R ceramic
capacitors (0805)
Murata GRM21BR71A106K
C20, C26, C45,
C47
4
2
1μF 10ꢀ, 10V X5R ceramic
capacitors (0603)
Murata GRM188R61A105K or
TDK C1608X5R1A105K
10μF 10ꢀ, 25V X5R ceramic
capacitors (1206)
Murata GRM31CR61E106K
C43, C44, C46
C22, C24
C35, C36
Green LED (0603)
Panasonic LNJ314G8TRA
D1
1
0
10pF 5ꢀ, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H100J or
TDK C1608C0G1H100J
2
Not installed, ferrite-bead inductor
(0603)
FB1
Windows and Windows Vista are registered trademarks of
Microsoft Corp.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX9694 Evaluation Kit
Component List (continued)
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
Not installed, dual-row (2 x 20)
40-pin header
Reference voltage generator
(32 TQFN-EP*)
Maxim MAX9694ETJ+
J1
J2
0
0
U1
U2
1
1
Not installed, dual-row (2 x 2)
4-pin header
Low-power 16-bit microcontroller
(68 QFN-EP*)
Maxim MAXQ2000-RAX+
JU1
JU2
1
1
3-pin header
5-pin header
U3
U4
1
1
93C46 3-wire 16-bit EEPROM (8 SO)
UART-to-USB converter (32 TQFP)
OUT_1–OUT_14,
OUTREFUH,
OUTREFUL,
OUTREFLH,
OUTREFLL
0
Not installed, small PCB test points
3.3V regulator (5 SC70)
Maxim MAX8511EXK33+T
(Top Mark: AEI)
U5
U6
1
1
Not installed, resistors (0603)
R1–R20, R58 are open;
R29–R46 are short
R1–R20,
R29–R46, R58
2.5V regulator (5 SC70)
Maxim MAX8511EXK25+T
(Top Mark: ADV)
0
R21, R25
R22, R24
R23
2
2
1
100Ω 1ꢀ resistors (0603)
4.32kΩ 1ꢀ resistors (0603)
1.21kΩ 1ꢀ resistor (0603)
Evluates:MAX694
Dual bidirectional level translators
(8 TDFN-EP*)
Maxim MAX3394EETA+T
(Top Mark: APE)
U7
1
1
R26, R27, R50,
R54, R55
5
2.2kΩ 5ꢀ resistors (0603)
USB type-B right-angle female
receptacle
USB
R28
R47, R48
R49
1
2
1
1
1
0
1
3.3kΩ 1ꢀ resistor (0603)
27Ω 5ꢀ resistors (0603)
1.5kΩ 5ꢀ resistor (0603)
10kΩ 5ꢀ resistor (0603)
220Ω 5ꢀ resistor (0603)
Not installed, resistor (0402)
0Ω 5ꢀ resistor (0603)
Y1
1
1
2
1
16MHz crystal
Y2
6MHz crystal
R51
—
Shunts (JU1, JU2)
PCB: MAX9694 Evaluation Kit+
R52
—
R53
*EP = Exposed pad.
R59
Component Suppliers
SUPPLIER
Murata Electronics North America, Inc.
Panasonic Corp.
PHONE
WEBSITE
770-436-1300
800-344-2112
847-803-6100
www.murata-northamerica.com
www.panasonic.com
TDK Corp.
www.component.tdk.com
Note: Indicate that you are using the MAX9694 when contacting these component suppliers.
2
_______________________________________________________________________________________
MAX9694 Evaluation Kit
Evluates:MAX694
MAX9694 EV Kit Files
FILES
INSTALL.EXE
MAX9694.EXE
REF.INI
DESCRIPTION
Installs the EV kit files on your computer
Application program
Software Initialization File
FTD2XX.INF
USB device driver file
UNINST.INI
Uninstalls the EV kit software
USB driver installation help file
USB_Driver_Help.PDF
Search for the best driver for your device option.
Specify the location of the device driver to be
C:\Program Files\MAX9694 (default installation
directory) using the Browse button. During device
driver installation, Windows may show a warning
message indicating that the device driver Maxim
uses does not contain a digital signature. This is not
an error condition and it is safe to proceed with instal-
lation. Refer to the USB_Driver_Help.PDF document
included with the software for additional information.
Quick Start
Required Equipment
Before beginning, the following equipment is needed:
•
•
MAX9694 EV kit (USB cable included)
A user-supplied Windows 2000/XP- or Windows
Vista-compatible PC with a spare USB port
•
•
9V to 20V DC power supply @ 500mA
One digital voltmeter (DVM)
5) Once the software and hardware installation is com-
plete, disconnect the USB cable from the EV kit.
Note: In the following sections, software-related items
are identified by bolding. Text in bold refers to items
directly from the EV kit software. Text in bold and
underlined refers to items from the Windows operating
system.
6) Verify that shunts are installed as follows:
JU1: Pins 1-2 (on-board 3.3V digital power supply)
JU2: Pins 1-2 (MAX9694 write address = 0xE8)
7) Connect the USB cable to the EV kit.
Procedure
The MAX9694 EV kit is fully assembled and tested.
Follow the steps below to verify board operation:
8) Connect the DVM negative terminal to the AGND
PCB pad next to the VREFL_L PCB pad.
1) Visit www.maxim-ic.com/evkitsoftware to down-
load the latest version of the EV kit software,
9694Rxx.ZIP. Save the EV kit software to a tempo-
rary folder and uncompress the ZIP file.
9) Connect a voltage probe to the DVM positive termi-
nal for later use.
10) Set the power supply to 15V and disable the power-
supply output.
2) Install the EV kit software on your computer by run-
ning the INSTALL.EXE program inside the tempo-
rary folder. The program files are copied and icons
are created in the Windows Start | Programs
menu.
11) Connect the power-supply positive terminal to the
AVDD PCB pad (center of board) and the negative
terminal to the nearby AGND PCB pad.
12) Enable the power-supply output.
3) Connect the USB cable from the PC to the EV kit
board. A New Hardware Found window pops up
when installing the USB driver for the first time. If
you do not see a window that is similar to the one
described above after 30 seconds, remove the USB
cable from the board and reconnect it.
Administrator privileges are required to install the
USB device driver on Windows.
13) Start the MAX9694 EV kit software by opening its
icon in the Start | Programs menu. The EV kit soft-
ware main window appears, as shown in Figure 1.
14) Use the DVM voltage probe to measure the refer-
ence input voltages on the VREFU_H, VREFU_L,
VREFL_H, and VREFL_L PCB pads, and type those
values into the corresponding edit boxes of the
Reference Voltages (V) group box in the software.
4) Follow the directions of the Add New Hardware
Wizard to install the USB device driver. Choose the
_______________________________________________________________________________________
3
MAX9694 Evaluation Kit
15) Press the Quick Start button.
MUST be measured at the appropriate PCB pads and
the values entered in the respective Reference
Voltages (V) edit boxes for the DAC output calculations
to be correct.
16) Use the DVM voltage probe to verify that the DAC
output voltages are close to the voltages shown in
the Output (V) edit boxes for the respective channel.
Upon IC startup, the DAC outputs wake up in high-
impedance mode. To exit high-impedance mode, press
the Quick Start button or perform the following steps:
Detailed Description of Software
The MAX9694 evaluation software main window is
shown in Figure 1. The GUI software automatically
detects the MAX9694 device address and displays it in
the I2C Address Setting drop-down list and in the soft-
ware status bar. The DAC output voltages in the Upper
DAC Channels and Lower DAC Channels group
boxes are calculated using the upper and lower refer-
ence input voltages on PCB pads VREFU_H, VREFU_L,
VREFL_H, and VREFL_L. The reference input voltages
1) Modify any of the DAC channel’s register values.
Register values are modified using the edit boxes
and scrollbars of the Register Settings tab. See
the Output Register Values section for more infor-
mation.
2) Press the Load All Values To Registers button.
The Quick Start button loads all registers with the val-
ues shown in Figure 1.
Evluates:MAX694
Figure 1. MAX9694 Evaluation Software Main Window
4
_______________________________________________________________________________________
MAX9694 Evaluation Kit
Evluates:MAX694
2
Output (V) edit box. The software uses a register
value that generates a voltage closest to the
desired voltage value.
I C Address Setting
2
The MAX9694’s I C slave address is displayed in the
I2C Address Setting drop-down list and in the bottom
status bar of the software window. If an address is
manually selected in the drop-down list, the software
verifies the address and changes the address dis-
played appropriately. If no acknowledge is received
from the EV kit, a pop-up window opens, directing the
user to properly set jumper JU2 on the EV kit. If the
Auto Detect Address checkbox is checked, the soft-
When a register value is changed, the corresponding
field changes its color to red. A user should synchro-
nize the GUI fields and actual device registers by
pressing the Load All Values To Registers button.
The Load All Reg Values From File button is used to
load all the register values and reference voltages from
a user-selected text file. The Save All Reg Values To
File button is used to save all the register values and
reference voltages on the current GUI to a user-named
text file.
2
ware automatically detects the I C address of the
MAX9694.
Upper and Lower DAC Output Voltages
The upper and lower DAC output voltages are generat-
ed using an on-board resistor-divider network. The user
can also apply external references to the VREFU_H,
VREFU_L, VREFL_H, and VREFL_L and AGND PCB
pads. The voltages on these four pads MUST be cap-
tured and typed into the appropriate edit boxes in the
Reference Voltages (V) group box for the calculated
DAC output voltages shown in the Upper DAC
Channels and Lower DAC Channels group boxes to
be correct.
V
Calibration
COM
V
calibration is controlled using the scrollbar and
COM
edit box of the DVR_OUT group box (see the Hardware
Configuration for V Calibration section to make use
COM
of this feature). The register value for the 7-bit DAC
controls the DVR_OUT sink current adjusting the volt-
age at the DVR_OUT pin as follows:
⎛
⎞
R20
R19 + R20
D +1
128
R19
20 × R28
⎛
⎝
⎞
⎠
⎛
⎝
⎞
⎠
⎛
⎝
⎞
⎠
V
=
× 1−
×
× AVDD
DVR
⎜
⎟
⎜
⎟
⎜
⎟
⎜
⎟
⎝
⎠
The transfer function for the upper DAC channels is:
where D is the DVR_OUT 7-bit register value and AVDD
is the voltage at the AVDD PCB pad.
D
256
V
= VREFU_L +
× (VREFU_H - VREFU_L)
OUT
Advanced User Interface
The transfer function for the lower DAC channels is:
D
A serial interface can be used by advanced users by
clicking Options | Interface (Advanced Users) from
the menu bar.
V
= VREFL_L +
× (VREFL_H - VREFL_L)
OUT
256
Click on the 2-wire interface tab shown in Figure 2.
Press the Hunt for active listeners button to obtain the
current MAX9694 slave address in the Target Device
Address: combo box. In the General commands tab
select 1 – SMBusWriteByte(addr,cmd,data8) in the
Command (SMBus Protocols, Raw Block Read/Write,
EEPROM Read/Write) drop-down list. Enter the desired
values into the Command byte: and Data Out: combo
boxes and then press the Execute button.
In both equations, D is the register’s decimal value.
Refer to the MAX9694 IC data sheet for more details.
When the evaluation software is run for the first time,
the reference input-voltage values in the Reference
Voltages (V) group box are loaded from an initialization
file (REF.INI). When the program is closed, the current
values are logged into the initialization file. The next
time the program is run, the latest values are loaded
automatically.
Detailed Description of Hardware
Output Register Values
Each DAC channel’s register value can be set in three
ways within the Upper DAC Channels and Lower DAC
Channels group boxes by:
The MAX9694 EV kit demonstrates the MAX9694 refer-
ence voltage generator in a 32-pin TQFN surface-
mount package with an exposed pad. EV kit
applications include gamma correction in TFT-LCD
panels, such as those found in high-resolution TVs,
high-end monitors, or for general industrial reference
voltage generation. Using four input reference voltages
(DAC reference inputs), the MAX9694 EV kit provides
14 programmable reference voltage outputs (DAC out-
•
•
Moving the channel’s scrollbar.
Typing register values directly into the channel’s
Reg Value edit box (decimal 8-bit equivalent).
•
Typing the expected output voltage in the channel’s
_______________________________________________________________________________________
5
MAX9694 Evaluation Kit
Evluates:MAX694
2
Figure 2. Advanced I C User Interface Window (2-Wire Interface Tab)
puts), four static buffered reference voltage outputs
(reference outputs), and a 7-bit DVR output for calibrat-
The on-board resistor-divider network (R21–R25) gen-
erates the reference inputs (REFU_H, REFU_L,
REFL_H, and REFL_L). The user can also apply exter-
nal reference voltages to the VREFU_H, VREFU_L,
VREFL_H, and VREFL_L PCB pads after removing
resistors R21–R25.
ing a V
voltage.
COM
To monitor the MAX9694 EV kit’s 14 DAC outputs
(OUT1–OUT14), and four reference outputs
(OUT_REFU_H, OUT_REFU_L, OUT_REFL_H, and
OUT_REFL_L), use header J1 or the labeled test points.
Reference outputs OUT_REFU_H, OUT_REFU_L,
OUT_REFL_H, OUT_REFL_L and DAC outputs OUT1,
OUT7, OUT8, and OUT14 provide 400mA of peak cur-
rent. DAC outputs OUT2–OUT6 and OUT9–OUT13 pro-
vide 200mA of peak current. Please stay within the
MAX9694 IC’s power rating. Refer to the MAX9694 IC
data sheet for more information.
The EV kit uses a 9V to 20V DC power supply, connect-
ed across the AVDD and AGND PCB pads, for powering
the EV kit application circuit. The EV kit may require up to
500mA of supply current depending on output loading.
6
_______________________________________________________________________________________
MAX9694 Evaluation Kit
Evluates:MAX694
2
The USB-to-I C interface circuit is powered by 2.5V
MAX9694 Slave Address Description
2
and 3.3V Maxim MAX8511 voltage regulators. The
application circuit’s digital supply (DVDD) can operate
from the on-board 3.3V supply or from a 2.7V to 3.6V
user supply. A Maxim MAX3394E dual, bidirectional
level translator provides logic-level translation between
the MAXQ2000 low-power 16-bit microcontroller and
the featured MAX9694 reference voltage generator.
The MAX9694 I C slave address can be set by jumper
JU2. The slave address can be set to one of four different
addresses. See Table 2 for slave address configuration.
Stand-Alone User-Supplied
2
I C Communication
The MAX9694 EV kit can be used in stand-alone opera-
2
tion to interface with a user’s I C system without using a
Hardware Configuration
PC. To use the MAX9694 EV kit with a user-supplied
2
for V
Calibration
I C interface, perform the following steps:
COM
COM
To make use of the MAX9694 V
connect the DVR_OUT PCB pad to a V
install appropriate values for resistors R19 and R20. By
default, the EV kit comes with 3.3kΩ installed at set resis-
tor R28. Refer to the Digital Variable Reference (DVR) sec-
tion of the MAX9694 IC data sheet for more information.
calibration feature,
1) Disconnect the USB cable from the EV kit.
amplifier or
COM
2) Cut open the shorting traces of jumper J2 on the top
layer.
3) Move the jumper JU1 shunt to pins 2-3.
4) Connect the positive terminal of a user-supplied 2.7V
to 5.5V DC power supply to the DIN PCB pad and
the negative terminal to the nearby DGND PCB pad.
Digital Supply Configuration
The MAX9694 EV kit provides two options to power the
MAX9694 DVDD, digital supply input. DVDD can operate
2
5) If the user-supplied I C interface circuit includes
2
from the 3.3V supply generated by the USB-to-I C inter-
pullup resistors for SDA and SCL, remove resistors
R26 and R27. Resistors R26 and R27 are pulled up
to DVDD.
face circuit or from a user-supplied 2.7V to 5.5V DC power
supply connected across the DIN and DGND PCB pads.
The user supply must provide a minimum of 100mA.
See Table 1 to configure DVDD using jumper JU1.
2
6) Connect the user-supplied I C interface signals
and signal ground return to the EV kit PCB pads, as
shown in Table 3.
Caution: Always ensure that DVDD is powered before
AVDD.
Table 1. Digital Supply Configuration (Jumper JU1)
2
SHUNT POSITION
DVDD PIN CONNECTION
DVDD POWER
I C COMMUNICATION
1-2*
3.3V
On-board
On-board
User-supplied
DVDD range: 3.3V to 5.5V**
2-3
DVDD PCB pad
DVDD PCB pad
On-board
User-supplied
DVDD range: 2.7V to 5.5V
2-3
User-supplied
*Default position.
2
**Minimum DVDD is limited to 3.3V by the USB-to-I C interface circuit 3.3V logic level.
2
Table 2. Slave Address Configuration
(Jumper JU2)
Table 3. User-Supplied I C Interface
USER-SUPPLIED
SIGNAL
EV KIT PCB PAD
SIGNAL
MAX9694 ADDRESS (hex)
SHUNT
A0 PIN
2
SDA
I C data
SDA
SCL
POSITION
CONNECTION
WRITE
0xE8
READ
0xE9
0xEB
0xED
0xEF
2
SCL
I C clock
1-2*
DGND
DIN
Signal ground
return
1-3
0xEA
0xEC
0xEE
GND
DGND
1-4
1-5
SCL
SDA
*Default position.
_______________________________________________________________________________________
7
MAX9694 Evaluation Kit
Evluates:MAX694
Figure 3. MAX9694 EV Kit Schematic—Application Circuit
8
_______________________________________________________________________________________
MAX9694 Evaluation Kit
Evluates:MAX694
2
Figure 4. MAX9694 EV Kit Schematic—USB-to-I C Circuit
_______________________________________________________________________________________
9
MAX9694 Evaluation Kit
Evluates:MAX694
Figure 5. MAX9694 EV Kit Component Placement Guide—Component Side
10 ______________________________________________________________________________________
MAX9694 Evaluation Kit
Evluates:MAX694
Figure 6. MAX9694 EV Kit PCB Layout—Component Side
______________________________________________________________________________________ 11
MAX9694 Evaluation Kit
Evluates:MAX694
Figure 7. MAX9694 EV Kit PCB Layout—Solder Side
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2008 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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