MAX97001EVKIT+ [MAXIM]
MAX97001 Evaluation Kit;型号: | MAX97001EVKIT+ |
厂家: | MAXIM INTEGRATED PRODUCTS |
描述: | MAX97001 Evaluation Kit |
文件: | 总12页 (文件大小:1578K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
19-5082; Rev 0; 12/09
MAX97001 Evaluation Kit
General Description
The MAX97001 evaluation kit (EV kit) is a fully assembled
and tested PCB that evaluates the MAX97001 mono
Class D audio power amplifier and stereo Class H
Features
Sꢀ Proven_Audio_PCB_Layout
Sꢀ On-Board_USB_Interface_Circuit_Generates_I2C-
Compatible_Signals
M
DirectDrive headphone amplifier communicating over
Sꢀ PCB_Pads_for_User-Supplied_I2C-Compatible_
a 2-wire I2C interface. The EV kit features an on-board
microcontroller for communicating with the I2C interface
of the MAX97001. PCB pads are provided for accessing
the analog inputs and amplifier outputs.
Signals
Sꢀ Surface-Mount_Components
Sꢀ Windows_2000-,_Windows_XP-,_and_Windows_Vista_
(32-Bit)-Compatible_Software
The MAX97001 EV kit requires a 2.7V to 5.5V supply for
PVDD and a 1.8V supply for VDD.
Sꢀ Fully_Assembled_and_Tested_
M
M
M
Windows 2000-, Windows XP -, and Windows Vista -
compatible software is provided to facilitate configura-
tion. The software controls an on-board microcontroller
over USB, which generates I2C commands.
Ordering Information
PART
TYPE
MAX97001EVKIT+
EV Kit
+Denotes lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
C26–C29,
0
Not installed, ceramic capacitors
(0402)
0.1FF Q10%,16V X7R ceramic
capacitors (0603)
C39–C42
C1, C3–C10, C17 10
Murata GRM188R71C104K
0.1FF Q10%, 16V X7R ceramic
capacitors (0402)
Murata GRM155R71C104K
C31, C33
C43–C47
2
5
4.7FF Q10%, 6.3V X5R ceramic
capacitor (0603)
Murata GRM188R60J475K
C2
1
2
0.22FF Q10%, 10V X5R ceramic
capacitors (0402)
Murata GRM155R61A224K
10pF Q5%, 50V C0G ceramic
capacitors (0603)
C11, C12
Murata GRM1885C1H100J
D1
1
1
Green LED (0603)
GND
Black miniature test point
10FF Q10%, 6.3V X5R ceramic
capacitors (0603)
Murata GRM188R60J106M
C13, C15, C32,
C34
4
3.5mm stereo phone jack, SMT
(3 positions, nonswitch)
HPJK
1
HPL
1
1
2
2
2
White miniature test point
Red miniature test point
White RCA jacks (left)
Red RCA jacks (right)
2-pin headers
1FF Q10%, 10V X5R ceramic
capacitors (0402)
Murata GRM155R61A105K
C14, C16, C22–
C25, C35–C38
10
2
HPR
JINA1, JINB1
JINA2, JINB2
JU1, JU2
22pF Q5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H220J
C18, C19
C20
Not installed, inductors (provided
with EV kit)
TOKO A916CY-220M
L1, L2
0
2
3300pF Q10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H332K
1
OUT-, OUT+
1-pin headers
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
Windows, Windows XP, 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.
MAX97001 Evaluation Kit
Component List (continued)
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
USB mini type-B receptacle con-
nector
93C46 type 3-wire EEPROM
(8 SO)
P1
1
7
U3
U4
1
1
UART-to-USB converter (32 TQFP)
R1, R10–R13,
R18, R19
0I Q5% resistors (0402)
3.3V regulator (5 SC70)
Maxim MAX8511EXK33+
(Top Mark: AEI)
R2
R3
1
1
1
3
2
2
0
2
2
220I Q5% resistor (0603)
10kI Q5% resistor (0603)
2.2kI Q5% resistor (0603)
1.5kI Q5% resistors (0603)
27I Q5% resistors (0603)
10I Q1% resistors (0402)
Not installed, resistors (0603)
0I Q5% resistors (0603)
22I Q5% resistors (0402)
U5
U6
Y1
Y2
1
1
1
1
R4
2.5V regulator (5 SC70)
Maxim MAX8511EXK25+
(Top Mark: ADV)
R5, R8, R9
R6, R7
R14, R15
R16, R17
R20, R21
R22, R23
16MHz crystal (HCM49)
Hong Kong X'tals
SSM16000N1HK188F0-0
6MHz crystal (HCM49)
Hong Kong X'tals
SSL60000N1HK188F0-0
Not installed, multipurpose test
points
TP1, TP2
0
USB high-speed A-to-mini B
cable, 2m
Mono Class H speaker and
DirectDrive headphone amplifier
(20 WLP)
—
1
2
1
U1
1
—
Shunts
Maxim MAX97001EWP+
PCB: MAX97001 EVALUATION
KIT+
—
32-bit microcontroller
(68 QFN-EP*)
U2
1
*EP = Exposed pad.
Maxim MAXQ2000-RAX+
Component Suppliers
SUPPLIER
PHONE
WEBSITE
Hong Kong X’tals Ltd.
852-35112388
770-436-1300
847-297-0070
www.hongkongcrystal.com
www.murata-northamerica.com
www.tokoam.com
Murata Electronics North America, Inc.
TOKO America, Inc.
Note: Indicate that you are using the MAX97001 when contacting these component suppliers.
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MAX97001 Evaluation Kit
4) Verify that a shunt is installed on jumper JU3.
MAX97001 EV Kit Files
5) 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 a window is not seen that is similar to the one
described above after 30s, remove the USB cable
from the board and reconnect it. Administrator privi-
leges are required to install the USB device driver
on Windows.
FILE
DESCRIPTION
Installs the EV kit files on your
computer
INSTALL.EXE
MAX97000_1_2.EXE
FTD2XX.INF
Application program
USB device driver file
Uninstalls the EV kit software
UNINST.INI
USB_Driver_Help.PDF USB driver installation help file
6) Follow the directions of the Found_New_Hardware
window to install the USB device driver. Manually
Quick Start
Required Equipment
specify the location of the device driver to be C:\
Program_Files\MAX97000ꢀ1ꢀ2 (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 installation. Refer to the USB_Driver_Help.PDF
document included with the software for additional
information.
• 5V, 1A DC power supply (PVDD)
• 1.8V, 100mA DC power supply (VDD)
• Speaker
• Headphones
• User-supplied Windows 2000, Windows XP, or
Windows Vista PC with a spare USB port
• MAX97001 EV kit (cable included)
7) Connect the 5V power supply across the PVDD and
GND pads.
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_under-
lined refers to items from the Windows operating system
8) Connect the 1.8V power supply across the VDD and
GND pads.
9) Connect the speaker across the OUT+ and OUT-
test points.
Procedure
The MAX97001 EV kit is fully assembled and tested.
Follow the steps below to verify board operation:
10) Connect the headphones to HPJK.
11) Enable the power supplies.
1) Visit www.maxim-ic.com/evkitsoftware to down-
load the latest version of the EV kit software,
MAX97000_1_2xx.ZIP. Save the EV kit software to a
temporary folder and uncompress the ZIP file.
12) Start the MAX97001 EV kit software by selecting its
icon in the Start_|_Programs menu.
13) Observe as the program automatically detects the
address of the MAX97001 and starts the main program.
2) Install the EV kit software on the computer by run-
ning the INSTALL.EXE program inside the temporary
folder.
14) The MAX97001 is now ready for evaluation.
3) Verify that shunts are installed on jumpers JU1 and
JU2. This configures the I2C inputs to receive signals
from the USB interface circuitry.
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MAX97001 Evaluation Kit
The MAX97001 EV kit software Main_Control tab sheet
(Figure 1) divides the EV kit functions into logical blocks.
The MAX97001 EV kit software Registers tab (Figure 2)
displays each register’s individual bit logic-level status.
A data bit in bold indicates a logic-high, while a non-
bolded data bit indicates a logic-low. Clicking on the
individual data bit toggles the bit and performs a write
command. The new command is shown in the 0x edit
box at the far right. Write commands can be written to
the registers alternatively by typing a hex value in the
edit box and pressing Enter on the keyboard.
Detailed Description of Software
Note: Text in bold refers to items in the EV kit software.
Graphical User Interface (GUI)
The MAX97001 EV kit software GUI (Figures 1 and 2)
provides a convenient way to test the features of the
MAX97001. Figure 1 displays the MAX97001 EV kit soft-
ware’s Main_Control tab sheet, while Figure 2 displays
the Registers tab sheet. Actions on the two tabs gener-
ate I2C commands to update the MAX97001 internal
memory registers.
Figure 1. MAX97001 Evaluation Kit Software (Main Control Tab)
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MAX97001 Evaluation Kit
Figure 2. MAX97001 Evaluation Kit Software (Registers Tab)
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MAX97001 Evaluation Kit
box disables the zero-crossing detection (ZCD) during a
volume change operation when checked. When enabled
(unchecked), the ZCD forces all volume adjustment to
be made when the output signal is crossing zero, thus
reducing audio clicks during volume changes.
Software Startup
Upon starting the program, the MAX97001 EV kit soft-
ware automatically searches for the USB interface cir-
cuit and then for the MAX97001 device address. The
MAX97001 EV kit enters the normal operating mode
when the USB connection is detected and has found the
device address. If the USB connection is not detected,
the software prompts the user to retry or enter the demo
mode.
Input Gain
The MAX97001 EV kit software’s Input_ Gain group
box selects the input channel preamp gain for the
MAX97001. The MAX97001 input channel preamp gain
is selectable between -6dB, -3dB, 0dB, +3dB, +6dB,
+9dB, and +18dB.
Demo Mode
The MAX97001 EV kit software enters the demo mode
when the USB connection is not detected, or by select-
ing the Options_ |_ Demo_ Mode menu item in the main
window. When in demo mode, all software communica-
tion to the EV kit circuit is disabled; however, most of the
software GUI is functional. Demo mode allows the user
to evaluate the software without hardware connectivity.
If the USB cable is connected to the EV kit, but power
is not applied to PVDD, the EV kit GUI acts like it is in
demo mode. In such a case, the EV kit is connected to
the PC through USB and I2C commands can be sent to
the MAX97001. However, without power, the MAX97001
does not acknowledge the I2C commands. When power
is applied, press the Reset button to detect the pres-
ence of the MAX97001.
Charge Pump
The MAX97001 features an internal charge pump for
Maxim’s Class H DirectDrive architecture. The charge
pump operates in two modes, fixed mode and high-effi-
ciency mode. By default, the MAX97001 charge pump
operates in high-efficiency mode. High-efficiency mode
on the charge pump dynamically changes the internal
supply rails. To have fixed internal supply rails, check the
Fixed_Mode checkbox in the Charge_Pump group box.
Within fixed mode, there are two options for the supply
rails shown in the drop-down list, Q1.8V and Q0.9V.
Distortion Limiter
The distortion limiter limits distortion based on the
defined THD level and has programmable release time.
Write All/Read All/Reset
The Write_All button writes the current settings to all the
registers on the GUI. The EV kit software GUI performs
I2C write commands as changes occur on the GUI. The
Read_ All button changes the GUI settings to match
the MAX97001 register settings. To change settings
one time, enter demo mode by selecting the Options_|_
Demo_Mode menu item, change the GUI to the required
settings, exit demo mode by selecting Options_|_Demo_
Mode, and then press the Write_ All_ button. If further
changes are not required, enter demo mode to dis-
able communication to the MAX97001. To obtain the
MAX97001 settings, exit demo mode and press the
Read_All button. The Reset button clears the EV kit soft-
ware GUI and reprograms the MAX97001 to the default
values.
Switch Enable
The MAX97001 features an internal switch that can
bypass the Class D amplifier and allow an external
amplifier to power the same speaker connected to the
MAX97001 EV kit without requiring external switches.
Connect the external amplifier output to COM1 and
COM2, and enable in the software by checking the
Switch_Closed checkbox in the Analog_Switch group
box.
Low-Power Mode
The MAX97001’s low-power mode minimizes current
consumption when only using the headphone amplifier.
Low-power mode transmits a single-ended audio signal
to the headphone amplifier from either INA or INB, or a
differential signal from INA and INB. Low-power mode
can be enabled by clicking on the LP_Mode drop-down
list. The volume control and mixer are bypassed in this
mode.
MAX97001 Master Controls
The EV kit software’s MAX97001_Master_Controls group
box contains ENABLE, Volume_Slew_Disable, and Zero_
Crossing_Detection_Disable checkboxes. The ENABLE_
checkbox, which is also called the software shutdown,
enables or disables the MAX97001. The Volume_Slew_
Disable checkbox, when checked, disables the volume
slewing. The Zero_Crossing_Detection_Disable check-
Mixer
The speaker, left headphone, and right headphone
each have an independent mixer. The MAX97001 EV kit
accepts a pair of single-ended audio inputs for stereo
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MAX97001 Evaluation Kit
operation, or a pair of differential audio inputs for mono
operation. The single-ended input signals for the speak-
er and headphones are defined as IN_1 (left) and IN_2
(right). In the Input_ Configuration group box, select
Stereo_(S/E) for single-ended stereo operation or Mono_
(DIF) for differential mono operation. Depending on the
selection, the speaker and headphone mixers provide
options for selecting the audio source for the SPKR_
Mixer, Left_HP_Mixer, and Right_HP_Mixer.
the headphone volume. The Left_HP_Enable and Right_
HP_Enable checkboxes enable the headphone amplifiers.
The Left_ Headphone_ Volume and Right_ Headphone_
Volume track bars set the left and right headphone
volume, respectively, to between -64dB (min) to +6dB_
(max). Alternatively, the user can enter a numerical
value inside the Left_ Headphone_ Volume and Right_
Headphone_Volume edit boxes.
I2C Interface Indicator
The MAX97001 EV kit software Interface group box dis-
plays the MAX97001’s_ I2C_ Device_ Address, Register_
Address, and the last Data_ Sent. The MAX97001 I2C
device address is internally set to 0x9A.
Speaker Amplifier
The MAX97001 EV kit software’s Speaker_ Amplifier
group box contains the speaker mixer, speaker volume,
and speaker-enable control. Check the Speaker_Enable
checkbox to enable the speaker amplifier. The Speaker_
Volume track bar sets the speaker volume between
-30dB (min) to +20dB (max). Alternatively, the user can
enter a numerical value inside the Speaker_Volume edit box.
Simple I2C Commands
There are three methods for communicating with the
MAX97001 EV kit, through the Main_Control tab (Figure
1), the Registers tab (Figure 2), or by using low-level
SMBusK commands available in the Advanced_ User_
Interface window (Figure 3). Select the Options_|_Interface
(Advanced_ User_ Interface) menu item to display the
Advanced_User_Interface window that allows I2C opera-
tions, such as SMBusReadByte and SMBusWriteByte.
Headphone Amplifier
The Headphone_ Amplifier group box enables or dis-
ables the headphone outputs. The Left_ Headphone_
Volume and Right_Headphone_Volume track bars set
Figure 3. Advanced User Interface Window (2-Wire Interface Tab)
SMBus is a trademark of Intel Corp.
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MAX97001 Evaluation Kit
any filtering. Use the OUT+/OUT- test points to connect
the speaker directly to the MAX97001 outputs using a
twisted-pair cable. Do not install inductors L1 and L2 for
maximum efficiency.
Detailed Description of Hardware
The MAX97001 EV kit evaluates the MAX97001 Class D
audio amplifier and stereo DirectDrive headphone ampli-
fier that communicate over I2C. The EV kit demonstrates
the MAX97001 features, such as user-defined input con-
figuration, input gain, input source, output enable, and
volume control.
Filtered Output
Audio analyzers typically cannot accept pulse-width-
modulated (PWM) signals at their inputs. Therefore, the
MAX97001 EV kit includes a pair of lowpass filters at
the output to ease evaluation. To use the filtering output
pads (FOUT+/FOUT-), install inductors L1 and L2 (pro-
vided with the EV kit), connect the load between FOUT+
and FOUT-, and connect the filtered output to the audio
analyzer. The lowpass filters at the speaker outputs are
optimized for an 8I speaker.
The EV kit uses the MAX97001 IC in a 20-bump WLP
(2mm x 2mm) package on a proven four-layer PCB
design. The MAX97001 EV kit operates from a 2.7V to
5.5V supply for PVDD and a 1.8V supply for VDD.
Filterless Output
The MAX97001 EV kit’s filterless outputs (OUT+/OUT-)
can be connected directly to a speaker load without
Table_1._Jumper_Table
SHUNT_
POSITION
JUMPER
DESCRIPTION
Closed*
Open
On-board I2C (connects on-board SCL signal to the SCL pad)
User-supplied I2C (open the jumper and apply the SCL signal to the SCL pad)
JU1
Closed*
Open
On-board I2C (connects on-board SDA signal to the SDA pad)
User-supplied I2C (open the jumper and apply the SDA signal to the SDA pad)
JU2
*Default position.
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MAX97001 Evaluation Kit
Figure 4a. MAX97001 EV Kit Schematic (Sheet 1 of 2)
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ_ _ 9
MAX97001 Evaluation Kit
Figure 4b. MAX97001 EV Kit Schematic (Sheet 2 of 2)
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MAX97001 Evaluation Kit
1.0’’
1.0’’
Figure 6. MAX97001 EV Kit PCB Layout—Component Side
Figure 5. MAX97001 EV Kit Component Placement Guide—
Component Side
1.0’’
Figure 7. MAX97001 EV Kit PCB Layout—GND Layer 2
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MAX97001 Evaluation Kit
1.0’’
1.0’’
Figure 9. MAX97001 EV Kit PCB Layout—Solder Side
Figure 8. MAX97001 EV Kit PCB Layout—Power Layer 3
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.
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2009 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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