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Evaluation Board User Guide
UG-040
One Technology Way • P. O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Evaluating the AD1937/AD1939 Four ADC/Eight DAC with PLL 192 kHz, 24-Bit Codec
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 32
EVAL-AD1937AZ/EVAL-AD1939AZ PACKAGE
CONTENTS
AD1937/AD1939 evaluation board
USBi control interface board
USB cable
OTHER SUPPORTING DOCUMENTATION
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
through an SPI or I
2
C interface. A small external interface
board, EVA L -ADUSB2EBZ (also called USBi), connects to a PC
USB port and provides I
2
C and SPI access to the evaluation
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.
FUNCTIONAL BLOCK DIAGRAM
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, BCLK, SDATA
Figure 1.
Verzeichnis
