ANALOG DEVICES UG-268 Service Manual

Evaluation Board User Guide

09805-001

SDATAFSYNC

IOUTB

MCLK

AD9838

RESET

FSELECT

PSELECT

EVAL-SDP-CB1Z

REF196

USB

SPORT

GPIO

IOUT

MCLK XO

SCLK

UG-268

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

Evaluating the AD9838 11 mW Power, 2.3 V to 5.5 V, 75 MHz Complete DDS

FEATURES

Full featured evaluation board for the AD9838 evaluation

board

Graphical user interface software for board control and data

analysis

Connector to E VAL-SDP-CB1Z system demonstration

platform (SDP) board

Various power supply and reference link options

APPLICATIONS

Biomedical sensors
Bioelectrical impedance analysis
Electrochemical analysis
Impedance spectroscopy
Complex impedance measurement
Nondestructive testing

GENERAL DESCRIPTION

The AD9838 is a 16 MHz low power DDS device capable of
producing high performance sine and triangular outputs. It
also has an on-board comparator that allows a square wave to
be produced for clock generation. Consuming only 20 mW of
power at 3 V makes the AD9838 an ideal candidate for power­sensitive applications.

The EVA L -AD9838SDZ board is used in conjunction with a
EVAL-SDP-CB1Z SDP board available from Analog Devices, Inc.
The USB-to-SPI communication to the AD9838 is completed
using this Blackfin®-based development board.

A high performance, on-board 16 MHz trimmed general oscillator
is available to use as the master clock for the AD9838 system.
Various links and SMB connectors are also available on the
EVAL-AD9838SDZ board to maximize usability.

Complete specifications for the AD9838 are provided in the
AD9838 data sheet, available from Analog Devices, and should
be consulted in conjunction with this user guide when using the
evaluation board.

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

FUNCTIONAL BLOCK DIAGRAM

Figure 1.

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