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Quick Start

Recommended Equipment

•

DC power supply (3.3V @ 0.5A)

•

Stereo audio source (e.g., CD player, MP3 player, etc.)

•32Ω or 16Ω headphones

•

MAX9723D EV system

MAX9723D EV kit

Maxim CMODUSB+ or CMOD232+ system

command module

•

A user-supplied Windows 98SE/2000/XP PC

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 98SE/

2000/XP operating system.

Procedure

Follow the steps below to verify board operation.

Caution: Do not turn on the power supply until all con-

nections are complete.

1) Visit the Maxim website (www.maxim-ic.com/evkit-

software) to download the most recent version of

the EV kit software, 9723RXX.ZIP. Save the EV kit

software to a temporary folder and uncompress the

ZIP file.

2) Install the MAX9723D EV kit software on your com-

puter by running the INSTALL.EXE program inside

the temporary folder. The program files are copied

and icons are created in the Windows Start |

Programs menu.

3) Carefully connect the system command module to

the EV kit by aligning the 20-pin connector of the

MAX9723D EV kit with the 20-pin header of the

Maxim system command module interface board.

4) Enable the pullup resistors on the system command

module by making sure the SDA switch and SCL

switch (both on SW1) are thrown on.

5) If using Maxim’s serial-interface board (CMOD232+),

connect a 9-pin male-to-female cable from the com-

puter’s serial port to CMOD232+. CMOD232+

requires a 9V power supply to P1 (DC IN). For regu-

lated 3.3V output voltage, install a shunt across pins

1-2 of J1 on the CMOD232+. If using Maxim’s USB

interface board (CMODUSB+), connect the A-to-B

USB cable from the computer’s USB port to

CMODUSB+. CMODUSB+ requires no external

power as it is powered from the PC USB port. For reg-

ulated 3.3V output, install a shunt across pins 2-3 of

J1 on the CMODUSB+.

6) Ensure that a shunt is placed across pins 1-2 of

JU3 on the MAX9723D EV kit board.

MAX9723D Evaluation Kit/Evaluation System

2

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Note: Indicate that you are using the MAX9723D when

contacting these component suppliers.

DESIGNATION

QTY

DESCRIPTION

J1

1

2 x 10 right-angle receptacle

JU1, JU2, JU3

3

3-pin headers

PJ1

1

3.5mm stereo jack

(SMT, lead free, and RoHS)

CUI Inc. SJ-3523-SMT

R1, R2

2

10kΩ ±1% resistors (0603)

lead free

R3, R6

2

22.1kΩ ±1% resistors (0603)

lead free

R4, R5

2

47.5kΩ ±1% resistors (0603)

lead free

U1

1

MAX9723DETE+ (16-pin TQFN)

Stereo DirectDrive headphone

amplifier

—

3

Shunts

—

1

MAX9723D EV kit PCB

Component List (continued)

MAX9723DEVKIT+

SUPPLIER

PHONE

WEBSITE

Keystone

800-221-5510

www.keyelco.com

Murata

770-436-1300

www.murata.com

TDK

847-703-6100

www.component.tdk.com

Component Suppliers

FILE

DESCRIPTION

INSTALL.EXE

Installs the EV kit files on your

computer

MAX9723V03.EXE

Application program

TROUBLESHOOTING_USB.

PDF

USB driver installation help

file

FTD2XX.INF

USB device driver file

UNINST.INI

Uninstall the EV kit software

MAX9723D EV Kit Files