ANALOG DEVICES UG-040 Service Manual

Evaluation Board User Guide

08411-001

Pb

a

SERIAL AUDIO

INTERFACES

CLOCK AND

DATA ROUTING

AD1939

VOLT

REG

AD1939

MCLK ROUTING

ANALOG
AUDIO

DAC 3 AND DAC 4

DAC 1 AND DAC 2

ANALOG

AUDIO

ANALOG
AUDIO

ADC 1 AND ADC 2

SPI

POWER SUPPLY

CONTROL

INTERFACE

S/PDIF

INTERFACE

LRCLK, BCL K, SDATA

UG-040

One Technology Way • P. O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: [phone] • Fax: [phone] • www.analog.com

Evaluating the AD1937/AD1939 Four ADC/Eight DAC with PLL 192 kHz, 24-Bit Codec

EVAL-AD1937AZ/EVAL-AD1939AZ PACKAGE CONTENTS

AD1937/AD1939 evaluation board
USBi control interface board
USB cable

OTHER SUPPORTING DOCU MENTATION

AD1937 data sheet
AD1939 data sheet

EVALUATION BOARD OVERVIEW

This document explains the design and setup of the evaluation
board for the AD1937 and AD1939. The evaluation board must
be connected to an external ±12 V dc power supply and ground.
On-board regulators derive 5 V and 3.3 V supplies for the
AD1937/AD1939. The AD1937/AD1939 can be controlled

FUNCTIONAL BLOCK DIAGRAM

through an SPI or I
board, EVA L-ADUSB2EBZ (also called USBi), connects to a PC
USB port and provides I
board through a ribbon cable. A graphical user interface (GUI)
program is provided for easy programming of the chip in a
Microsoft® Windows® PC environment. The evaluation board
allows demonstration and performance testing of most
AD1937/AD1939 features, including four ADCs and eight
DACs, as well as the digital audio ports.

Additional analog circuitry (ADC input filters, DAC output
filter/buffer) and digital interfaces such as S/PDIF are provided
to ease product evaluation.

All analog audio interfaces are accessible with stereo audio,

3.5 mm TRS connectors.

2

C interface. A small external interface

2

C and SPI access to the evaluation

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.

Rev. 0 | Page 1 of 32

Figure 1.