256-Position, Two-Time Programmable, I²C Compatible Digital Potentiometer

The AD5170 is a 256-position, Two-Time Programmable(TTP) Digital Potentiometer that employs fuse link technology to enable two opportunities at permanently programming the resistance setting. This device performs the same electronic adjustment function as mechanical potentiometers or variable resistors, with enhanced resolution, solid-state reliability, and superior low temperature coefficient performance.
The AD5170 is controlled using a 2-wire, I2C compatible digital Interface It allows unlimited adjustments before permanently(you really have two opportunities) setting the resistance value. After the final value is determined, a fuse blow command is executed which freezes the wiper position (analogous to placing epoxy on a mechanical trimmer).
In addition, for applications that program the AD5170 at the factory, Analog Devices offers device programming software running on Windows NT, 2000, and XP operating systems. This software effectively replaces any external I2C controllers, which in turn enhances users systems time-to-market.
An AD5170 evaluation kit and software are available. The kit includes the connector and cable that CAN be converted for further factory programming applications.
By Analog Devices, Inc.