General Description
The MAX97003 evaluation kit (EV kit) is a fully assembled
and tested PCB that evaluates the MAX97003 audio
subsystem. The device features a mono Class D speaker
amplifier and a stereo Class H DirectDriveM headphone
amplifier. The EV kit features an on-board microcontroller
for communicating with the I2C interface of the device.
Pads are provided for accessing the analog inputs and
amplifier outputs.
The EV kit requires a 2.7V to 5.5V power supply. The
on-board LDO generates an additional 1.8V supply from
the USB 5V supply. The EV kit delivers 1W into an 8I
speaker, and 32mW/channel into a 32I headphone.
Windows XPM-, Windows VistaM-, and WindowsM 7-compat-
ible EV kit software is provided to facilitate configuration.
The EV kit software controls the on-board microcontroller
over USB, which generates I2C commands.
Features
S 2.7V to 5.5V Single-Supply Operation
S Proven Audio PCB Layout
S On-Board USB Interface Circuit Generates
I2C-Compatible Signals
S PCB Pads for User-Supplied I2C-Compatible
Signals
S Surface-Mount Components
S Windows XP-, Windows Vista-, and Windows
7-Compatible Software
S Fully Assembled and Tested
I2C
STEREO/
MONO INPUT
POWER SUPPLY CONTROL
CLASS D
AMPLIFIER
CLASS H
AMPLIFIER
CHARGE
PUMP
STEREO/
MONO INPUT
2.7V TO
5.5V
VOLUME
DRC AND
EXPANDER
VOLUMEEXPANDER
1.8V
LIMITER
EARPHONE
GROUND SENSE
USB
ON-BOARD
MICROCONTROLLER
LDO
MAX97003
MAX97003 Evaluation Kit
Evaluates: MAX97003
_________________________________________________________________ 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.
19-6217; Rev 0; 2/12
Ordering Information appears at end of data sheet.
Figure 1. MAX97003 Evaluation Kit Simplified Block Diagram
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
Windows, Windows XP, and Windows Vista are registered
trademarks of Microsoft Corp.
DESIGNATION QTY DESCRIPTION
C1–C8, C114,
C123 10
1FF Q10%, 6.3V X5R ceramic
capacitors (0402)
Murata GRM155R60J105K
C9, C10, C101,
C103–C110,
C121
12
0.1FF Q10%, 6.3V X5R ceramic
capacitors (0402)
Murata GRM155R60J104K
C11, C12,
C102, C113,
C115, C122
6
10FF Q20%, 6.3V X5R ceramic
capacitors (0603)
Murata GRM188R60J106M
C13–C17 5
0.22FF Q10%, 6.3V X5R ceramic
capacitors (0402)
Murata GRM155R60J224K
C18–C25, C117 0Not installed, capacitors (0402)
C111, C112 2
10pF Q5%, 50V C0G ceramic
capacitors (0402)
Murata GRM1555C1H100J
C116 1
2.2FF Q20%, 6.3V X5R ceramic
capacitor (0402)
Murata GRM155R60J225M
C118, C119 2
22pF Q5%, 50V C0G ceramic
capacitors (0402)
Murata GRM1555C1H220J
C120 1
3300pF Q10%, 50V X7R ceramic
capacitor (0402)
Murata GRM155R71H332K
C125, C126 2
0.01FF Q10%, 16V X7R ceramic
capacitors (0402)
Murata GRM155R71C103K
D101 1 Green LED (0603)
FB101 0 Not installed, ferrite bead—short
(PC trace) (0603)
HPGND, OUT- 2Black multipurpose test points,
63 mil drill size
HPJK 1 3.5mm, 3-position stereo SMT
phone jack (non switch)
JINA1, JINB1 2Right-angle, PC-mount, white
RCA jacks
JINA2, JINB2 2Right-angle, PC-mount, red RCA
jacks
JU1, JU2, JU3 32-pin headers
JU4 1 3-pin header
L1, L2 0Not installed, inductors
DESIGNATION QTY DESCRIPTION
OUT+, TPHPR 2Red multipurpose test points,
63-mill drill size
P101 1
-20V, -2.4A p-channel MOSFET
(3 SuperSOT)
Fairchild FDN304PZ_NL
R1–R10, R101 11 0I Q5% resistors (0402)
R11, R12 222I Q5% resistors (0402)
R13, R14, R105 31.5kI Q5% resistors (0402)
R102 1 220I Q5% resistor (0402)
R103, R104,
R109 0Not installed, resistors (0402)
R106, R107 227I Q5% resistors (0402)
R108 1 1kI Q5% resistor (0402)
TPHPL 1 White multipurpose test point,
63-mill drill size
U1 1
Audio subsystem with I2C
(20 WLP)
Maxim MAX97003EWP+
U101 1
32-bit microcontroller
(68 QFN-EP)
Maxim MAXQ2000-RAX+
U102 0 Not installed, EEPROM (8 SO)
U103 1 UART-to-USB converter
(32 TQFP)
U104 1 3.3V, 120mA regulator (5 SC70)
Maxim MAX8511EXK33+T
U105 1 2.5V, 120mA regulator (5 SC70)
Maxim MAX8510EXK25+T
U106 1 1.8V, 300mA regulator (5 SOT23)
Maxim MAX8887EZK18+T
USB 1 USB mini-B receptacle
Y101 1
16MHz crystal
Hong Kong X’tals
SSM16000N1HK188F0-0
Y102 1
6MHz crystal
Hong Kong X’tals
SSL60000N1HK188F0-0
— 1 USB high-speed A-to-mini-B
cable
— 4 Shunts
— 1 PCB: MAX97003 EVALUATION
KIT
_________________________________________________________________ Maxim Integrated Products 2
MAX97003 Evaluation Kit
Evaluates: MAX97003
Component List
SUPPLIER PHONE WEBSITE
Fairchild Semiconductor 888-522-5372 www.fairchildsemi.com
Hong Kong X’tals Ltd. 852-35112388 www.hongkongcrystal.com
Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com
_________________________________________________________________ Maxim Integrated Products 3
MAX97003 Evaluation Kit
Evaluates: MAX97003
Component Suppliers
Note: Indicate that you are using the MAX97003 when contacting these component suppliers.
Quick Start
Recommended Equipment
• MAX97003EVkit(USBcableincluded)
• 5V,1ADCpowersupply(PVDD)
• Speaker
• Headphones
• User-supplied Windows XP, Windows Vista, or
Windows 7 PC with an available USB port
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.
Procedure
The EV kit is fully assembled and tested. Follow the steps
below to verify board operation. Caution: Do not turn on
the power supply until all connections are completed.
1) Visit http://www.maxim-ic.com/evkitsoftware to
download the latest version of the EV kit software,
97003Rxx.ZIP. Save the EV kit software to a tempo-
rary folder and uncompress the ZIP file.
2) Install the EV kit software on your computer by run-
ning the INSTALL.EXE program inside the temporary
folder. The program files are copied and icons are
created in the Windows Start | Programs| Maxim
EVKIT Software menu.
3) Verify that all jumpers are in their default positions, as
shown in Table 1.
4) Connect the power supply between the PVDD and
PGND PCB pads.
5) Set the power supply to 4.2V and turn it on.
6) Apply a stereo single-ended audio signal to INA1
and INA2.
7) Connect a speaker between the OUT+ and OUT- test
points.
8) Connect a headphone to HPJK.
9) Connect a USB cable between the PC and the Mini-
USB port on the EV kit. 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
privileges are required to install the USB device
driver on Windows.
10) Follow the directions in the Found New Hardware
window to install the USB device driver. Refer to the
USB_Driver_Help_200.PDF document included with
the software for additional information.
11) Start the EV kit software by opening its icon in the
Start | Programs | Maxim EVKITSoftware menu.
The EV kit software main window appears, as shown
in Figure 2.
12) Wait while the software connects to the EV kit. Once
the connection is established, the status bar at the
bottom displays Hardware: Connected and Device
Found.
13) Once the EV kit software has initialized, select the
Control Panel tab.
14) Click on the Input A drop-down menu in the Input
PreAmp Gain group box and select 0dB.
15) Check the INA1 checkbox in the HPL Mixer group
box and the INA2 checkbox in the HPR Mixer group
box.
16) Check the HPL Enable and HPR Enable check-
boxes.
17) Check the Lock L&R HP Vol checkbox to force the
left and right output volume to match.
18) Drag either horizontal slider in the Headphone
Amplifiers group box to Max.
19) Check the INA1 and INA2 checkboxes in the SPK
Mixer group box.
20) Check the SPK Enable checkbox.
21) Drag the horizontal slider in the Speaker Amplifier
group box to Max.
22) Check the Enabled checkbox in the MAX97003
Master Controls group box. Audio is output to both
the headphone and speaker.
_________________________________________________________________ Maxim Integrated Products 4
MAX97003 Evaluation Kit
Evaluates: MAX97003
Detailed Description of Software
Graphical User Interface (GUI)
The MAX97003 EV kit software GUI provides a conveni-
ent way to test the features of the MAX97003. Figure 2
displays the EV kit software’s Control Panel tab sheet,
while Figure 3 displays the Control Registers tab sheet.
Actions on either of these two tabs generate I2C com-
mands to update the device’s internal memory registers.
The EV kit software Control Panel tab sheet divides the
EV kit functions into logical blocks. The EV kit software
Control Registers tab sheet displays each register’s indi-
vidual bit logic-level status. A data bit in bold indicates
a logic-high, while a data bit that is not bold 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 edit box at the right. Alternatively, write
commands can be written to the registers by typing a
hex value in the edit box and pressing the Enter key on
the keyboard.
Figure 2. MAX97003 EV Kit Software Main Window (Control Panel Tab)
_________________________________________________________________ Maxim Integrated Products 5
MAX97003 Evaluation Kit
Evaluates: MAX97003
Figure 3. MAX97003 EV Kit Software Main Window (Control Registers Tab)
_________________________________________________________________ Maxim Integrated Products 6
MAX97003 Evaluation Kit
Evaluates: MAX97003
Software Startup
Upon starting the program, the EV kit software automati-
cally searches for the USB interface circuit and then for
the IC device address. The EV kit enters the normal oper-
ating mode when the USB connection is detected and
has found the device address. The Enabled checkbox in
the Control Panel tab sheet enables the device opera-
tion. If the USB connection is not detected, the software
prompts the user to retry or enter the demo mode.
Demo Mode
The EV kit software enters the demo mode when the USB
connection is not detected, or by selecting the Options
| Demo Mode menu item in the main window. When in
demo mode, all software communication 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
the USB, and I2C commands can be sent to the device.
However, without power, the device does not acknowl-
edge the I2C commands. When power is applied, press
the Reset button to detect the presence of the device.
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
device register settings. To change settings one time,
enter demo mode by selecting the Options | Demo
Mode menu item, change the GUI to the required set-
tings, exit demo mode by selecting Options | Demo
Mode, and then press the Write All button. To obtain
the device settings, press the Read All button and the
GUI is updated to reflect the current register states of
the device. In addition, the EV kit software can be set to
automatically read back the device registers every 1s by
selecting the Options | Auto I2C Read menu item. The
Reset button clears the EV kit software GUI and repro-
grams the device to the default values.
I2C Interface
The EV kit software Interface group box displays the
device’s I2C Device Address, Register Address, and
the last Data Sent. The MAX97003’s I2C device address
is internally set to 0x9A.
MAX97003 Master Controls
The EV kit software MAX97003 Master Controls group
box provides checkboxes to control the device’s Enabled,
Enhanced Volume Smoothing, Volume Slewing, and
Zero Crossing Detection.
Input Configuration/Input PreAmp Gain
The Input Configuration group box configures the
device’s input channels A and B for Stereo (single-
ended) or Mono (differential). The Input PreAmp Gain
group box selects the gain values for the input channels.
The input preamp gains range from -3dB to +12dB in
1.5dB steps.
Headphone Amplifiers
The Headphone Amplifiers group box configures the
device’s headphone power supply, headphone output
gain, input channel selection, enables, mutes, volume
controls, and expander settings. The Fixed Voltage
Charge Pump Mode checkbox selects between Class H
and fixed supply mode to power the headphones. When
the Fixed Voltage Charge Pump Mode checkbox is
checked, the Charge Pump Output Select radio group
box is enabled, allowing HPVDD/HPVSS to be set to
either Q1.8V or Q0.9V. The HP Output Gain ranges from
0dB to 6dB in 2dB steps. The HPL Mixer and HPR Mixer
group boxes select the input channels to the headphone
amplifiers. There are four input channels (INA1, INA2,
INB1, and INB2) that can be connected into each head-
phone amplifier. The HP Expander group box configures
the HP Expansion Ratio, HP Expander Attack Time,
and HP Expander Threshold. The Lock L&R HP Vol
checkbox locks the Right Headphone Volume track bar/
edit box to the Left Headphone Volume track bar/edit
box when it is checked.
Speaker Amplifier
The Speaker Amplifier group box configures the
device’s speaker output modulation, output gain, input
channel selection, enable, mute, volume control, expand-
er, dynamic range compressor, distortion limiter settings,
and the speaker low-power mode. The Fixed Class D
Freq Enable checkbox selects between spread-spec-
trum and fixed-frequency modulation for the speaker out-
put. The SPK Output Gain ranges from +12dB to +24dB
in 4dB steps. The SPK Mixer group box selects the input
channels to the speaker amplifier. There are four input
channels (INA1, INA2, INB1, and INB2) that can be con-
nected into the speaker amplifier. The SPK Expander
group box configures the SPK Expansion Ratio, SPK
Expander Attack Time, and SPK Expander Threshold.
The Dynamic Range Compressor (DRC) group box
configures the DRC Enable and Compression Ratio,
DRC Attack Time Constant, DRC Release Time, and
DRC Compression Threshold Level. The Distortion
Limiter group box is enabled when the Zero Crossing
Detection checkbox is unchecked. The Speaker Low-
Power Mode group box sets the SPK Low-Power Mode
Volume Threshold and selects the Class D output
mode. The Class D Output is selectable between Active
continuously or Active if the speaker volume setting
is above SLPTH (speaker low-power threshold).
_________________________________________________________________ Maxim Integrated Products 7
MAX97003 Evaluation Kit
Evaluates: MAX97003
Simple I2C Commands
There are three methods for communicating with the EV
kit, through the Control Panel tab sheet, the Control
Registers tab sheet, or by using low-level SMBus com-
mands available in the Advanced User Interface win-
dow (Figure 4). Select Options | Interface (Advanced
Users) to display the Advanced User Interface window,
which allows I2C operations such as SMBusReadByte
and SMBusWriteByte.
Figure 4. MAX97003 EV Kit Software (Advanced User Interface)
JUMPER SHUNT
POSITION DESCRIPTION
JU1 Closed* On-board I2C. Connects the on-board SCL signal to the SCL PCB pad.
Open User-supplied I2C. Open the jumper and apply the SCL signal to the SCL PCB pad.
JU2 Closed* On-board I2C. Connects the on-board SDA signal to the SDA PCB pad.
Open User-supplied I2C. Open the jumper and apply the SDA signal to the SDA PCB pad.
JU3 Closed* On-board VDD supply. Connects an on-board LDO, outputting 1.8V to the VDD PCB pad.
Open External VDD supply. Externally supply VDD with 1.8V.
JU4 1-2* On-board I2C. Connects the on-board I2C pullup resistors to 3.3V.
2-3 User-supplied I2C. Connect the external I2C master’s logic voltage to the VI2C PCB pad.
_________________________________________________________________ Maxim Integrated Products 8
MAX97003 Evaluation Kit
Evaluates: MAX97003
Detailed Description of Hardware
The MAX97003 EV kit evaluates the MAX97003 Class
D audio amplifier and stereo DirectDrive Class H head-
phone amplifier, which communicates over I2C. The
EV kit demonstrates the device features such as user-
defined input configuration, input gain, input source,
output enable, and volume control. The EV kit uses the
device in a 20-bump (2.4mm x 2mm) wafer-level pack-
age (WLP) on a proven six-layer PCB design. The EV kit
operates from a 2.7V to 5.5V and 1.8V DC power supply.
The EV kit delivers 1W into an 8I speaker and 32mW/
channel into a 32I headphone.
Filterless Output
The EV kit’s filterless outputs (OUT+, OUT-) can be
connected directly to a speaker load without any filter-
ing. Use the OUT+ and OUT- test points to connect the
speaker directly to the device outputs using a twisted-
pair cable. Do not install inductors L1 and L2 for maxi-
mum efficiency.
Filtered Output
Audio analyzers typically cannot accept pulse-width
modulated (PWM) signals at their inputs. Therefore, the
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 (provided 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.
Table 1. Default Shunt Positions (Ju1–Ju4)
*Default position.
_________________________________________________________________ Maxim Integrated Products 9
MAX97003 Evaluation Kit
Evaluates: MAX97003
Figure 5a. MAX97003 EV Kit Schematic (Sheet 1 of 2)
________________________________________________________________ Maxim Integrated Products 10
MAX97003 Evaluation Kit
Evaluates: MAX97003
Figure 5b. MAX97003 EV Kit Schematic (Sheet 2 of 2)
1.0”
1.0” 1.0”
1.0”
________________________________________________________________ Maxim Integrated Products 11
MAX97003 Evaluation Kit
Evaluates: MAX97003
Figure 6. MAX97003 EV Kit Component Placement Guide—
Component Side
Figure 7. MAX97003 EV Kit PC Board Layout—Component
Side
Figure 8. MAX97003 EV Kit PCB Layout—GND Layer 2
Figure 9. MAX97003 EV Kit PCB Layout—GND Layer 3
1.0”
1.0”
1.0”
________________________________________________________________ Maxim Integrated Products 12
MAX97003 Evaluation Kit
Evaluates: MAX97003
Figure 10. MAX97003 EV Kit PCB Layout—PWR Layer 4 Figure 11. MAX97003 EV Kit PCB Layout—GND Layer 5
Figure 12. MAX97003 EV Kit PCB Layout—Solder Side
PART TYPE
MAX97003EVKIT# EV Kit
________________________________________________________________ Maxim Integrated Products 13
MAX97003 Evaluation Kit
Evaluates: MAX97003
#Denotes RoHS compliant.
Ordering Information
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 2/12 Initial release —
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 14
© 2012 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
MAX97003 Evaluation Kit
Evaluates: MAX97003
Revision History
