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.
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