GENERAL DESCRIPTION

The AD5273 is a 64-position, one-time programmable (OTP) digital potentiometer4 that employs fuse link technology to achieve permanent program setting. This device performs the same electronic adjustment function as most mechanical trimmers and variable resistors. It allows unlimited adjustments before permanently setting the resistance values. The AD5273 is programmed using a 2-wire, I2C-compatible digital control. During write mode, a fuse blow command is executed after the final value is determined, thereby freezing the wiper position at a given setting (analogous to placing epoxy on a mechanical trimmer).

FEATURES

64 positions

One-time programmable (OTP)1 set-and-forget

Resistance setting—low cost alternative over EEMEM

Unlimited adjustments prior to OTP activation

1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ end-to-end terminal resistance

Compact 8-lead SOT-23 standard package

Ultralow power: IDD = 5 µA maximum

Fast settling time: tS = 5 µs typical during power-up

I2C-compatible digital interface

Computer software2 replaces microcontroller in

factory programming applications

Wide temperature range: −40°C to +105°C

Low operating voltage: 2.7 V to 5.5 V

OTP validation check function

APPLICATIONS

System calibrations

Electronics level settings

Mechanical potentiometers and trimmer replacement

Transducer circuit adjustments

Programmable filters up to 6 MHz BW3