GENERAL DESCRIPTION

The AD5171 is a 64-position, one-time programmable (OTP) digital potentiometer 2 that uses fuse link technology to achieve the memory retention of the resistance setting function. OTP is a cost-effective alternative over the EEMEM approach for users who do not need to reprogram new memory settings in the digital potentiometer. This device performs the same electronic adjustment function as most mechanical trimmers and variable resistors.

FEATURES

64 position

One-time programmable (OTP) set-and-forget resistance setting—low cost alternative over EEMEM

Unlimited adjustments prior to OTP activation

5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ end-to-end resistance

Low temperature coefficient: 5 ppm/°C in potentiometer mode

Low temperature coefficient: 35 ppm/°C in rheostat mode

Compact standard 8-lead SOT-23 package

Low power: IDD = 10 μA maximum

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

I2C-compatible digital interface

Computer software replaces microcontroller in factory programming applications

Full read/write of wiper register

Extra I2C device address pin

Low operating voltage: 2.7 V to 5.5 V

OTP validation check function

Automotive temperature range: −40°C to +125°C

APPLICATIONS

System calibrations

Electronics level settings

Mechanical trimmers and potentiometer replacements

Automotive electronics adjustments

Gain control and offset adjustments

Transducer circuit adjustments

Programmable filters up to 1.5 MHz BW 1