Dig pots enable new level of precision calibration in industrial systems

Dig pots enable new level of precision calibration in industrial systems

Parts deliver 20 times better resistor tolerance than competing devices

Designed for open-loop applications and systems that demand precision calibration and tolerance matching, the AD5291/2/3 family of 10-bit programmable digital potentiometers features less than 1% end-to-end resistor tolerance error over a wide ±15-V supply range — claimed 20 times better than competing digital potentiometers, allowing designers to improve system control by setting more accurate amplifier gain ranges.

The parts support dual power supplies in the ±10.5 to ±15-V range and single supply operation in the 21 to 30-V range. The 1,024-tap AD5292 and pin-compatible, 256-tap AD5291 feature a 20-times-programmable memory.

The wiper setting of these two devices is controlled through an SPI-compatible port. An internal fuse is blown to permanently save the wiper position. Triggered by a simple software command, the devices need no external power supply to program them, saving cost and PCB area. The 1,024-tap AD5293 features volatile memory. (Ea/1,000: AD5291, $2.29, AD5292, $2.62, AD5293, $2.55 samples available now.)

Analog Devices , Wilmington , MA
Information 800-262-5643
http://www.analog.com