Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

that may result from its use. No license is granted by implication or other-

wise under any patent or patent rights of Analog Devices.Trademarks and

registered trademarks are the property of their respective companies.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 2002. All rights reserved.

AD5273

64-Position OTP Digital Potentiometer

GENERAL DESCRIPTION

The AD5273 is a 64-position, One-Time-Programmable (OTP)

digital potentiometer

the permanent program setting. This device performs the same

electronic adjustment function as most mechanical trimmers and

variable resistors. It allows unlimited adjustments before perma-

nently setting the resistance values. The AD5273 is programmed

using a 2-wire, I

mode, a fuse blow command is executed after the final value

is determined, therefore freezing the wiper position at a given

setting (analogous to placing epoxy on a mechanical trimmer).

When this permanent setting is achieved, the value will not change

regardless of the supply variations or environmental stresses under

normal operating conditions. To verify the success of permanent

programming, Analog Devices patterned the OTP validation such

that the fuse status can be discerned from two validation bits in

the read mode.

FUNCTIONAL BLOCK DIAGRAM

GND

AND

CONTROL LOGIC

A

W

B

WIPER

REGISTER

FUSE

LINK

A0

SDA

SCL

AD5273

In addition, for applications that program AD5273 at the factory,

Analog Devices offers device programming software

Windows

application effectively replaces any external I

in turn enhances users’ systems time-to-market.

AD5273 is available in 1 k , 10 k , 50 k , and 100 k

in

compact SOT23 8-lead standard package and operates from

–40°C to +105°C.

Besides its unique OTP feature, the AD5273 lends itself well to

general digital potentiometer applications due to its effective

resolution, array resistance options, small footprint, and low cost.

An AD5273 evaluation kit and software are available.The kit includes

the connector and cable that can be converted for further factory

programming applications.

For applications that require dynamic adjustment of resistance

settings with nonvolatile EEMEM, users should refer to AD523x

and AD525x families of nonvolatile memory digital potentiometers.

NOTES

the wide variations in computer configurations.

FEATURES

64 Positions

Resistance Setting

1 k , 10 k , 50 k , 100 k

End-to-End Terminal Resistance

Compact Standard SOT23-8 Package

C in Factory Programming

Applications

Wide Temperature Range: –40 C to +105 C

5 V Programming Voltage

Low Operating Voltage, 2.7 V to 5.5 V

OTP Validation Check Function

APPLICATIONS

Systems Calibrations

Electronics Level Settings

Automotive Electronics Adjustments

Transducer Circuits Adjustments

REV. 0