ANALOG DEVICES UG-276 Service Manual

Evaluation Board User Guide
EVAL-ADN2850SDZ
09842-001
SYSTEM DEMONSTRATION
PLATFORM
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
UG-276
Evaluation Board for the ADN2850 Digital Rheostat

FEATURES

Full featured evaluation board for the ADN2850 Several test circuits Various ac/dc input signals PC control via a separately purchased system development
platform (SDP) PC control software 26 extra bytes in EEMEM for user-defined information Resistor tolerance error stored in EEMEM

PACKAGE CONTENTS

EVAL-ADN2850SDZ evaluation board CD that includes
Self-installing software that allows users to control the
board and exercise all functions of the device Electronic version of the ADN2850 data sheet Electronic version of the UG-276 document

GENERAL DESCRIPTION

This user guide describes the evaluation board for evaluating the
ADN2850—a dual-channel, 1024-position, nonvolatile memory
digital resistor. With versatile programmability, the ADN2850 allows multiple modes of operation, including read/write access in the RDAC and EEMEM registers, increment/decrement of resistance, resistance changes in ±6 dB scales, wiper setting read­back, and extra EEMEM for storing user-defined information, such as memory data for other components or a lookup table.
The ADN2850 supports a dual-supply ±2.25 V to ±2.75 V operation and a single-supply 2.7 V to 5.5 V operation, making the device suited for battery-powered applications and many other applications. In addition, the ADN2850 uses a versatile SPI-compatible serial interface, allowing speeds of up to 50 MHz.
The E VA L -ADN2850SDZ can operate in single-supply and dual-supply mode and incorporates an internal power supply from the USB.
Complete specifications for the ADN2850 part can be found in the ADN2850 data sheet, which is available from Analog Devices, Inc., 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.

DIGITAL PICTURE OF EVALUATION BOARD WITH SYSTEM DEMONSTRATION PLATFORM

Figure 1.
Rev. 0 | Page 1 of 16
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