The AD5272 / AD5274 are single-channel, 1024-/256-position digital rheostats that combine industry leading variable resistor performance with nonvolatile memory (NVM) in a compact package. The AD5272 / AD5274 ensure less than 1% end-to-end resistor tolerance error and offer 50-times programmable (50-TP) memory. The guaranteed industry leading low resistor tolerance error feature simplifies open-loop applications as well as precision calibration and tolerance matching applications. The AD5272 / AD5274 device wiper settings are controllable through the I2C-compatible digital interface. Unlimited adjustments are allowed before programming the resistance value into the 50-TP memory. The AD5272/AD5274 do not require any external voltage supply to facilitate fuse blow and there are 50 opportunities for permanent programming. During 50-TP activation, a permanent blow fuse command freezes the wiper position (analogous to placing epoxy on a mechanical trimmer). The AD5272 / AD5274 are available in a 3 mm × 3 mm 10-lead LFCSP package and in a 10-lead MSOP package. The parts are guaranteed to operate over the extended industrial temperature range of −40°C to +125°C. Applications * Mechanical rheostat replacements * Op-amp: variable gain control * Instrumentation: gain, offset adjustment * Programmable voltage to current conversions * Programmable filters, delays, time constants * Programmable power supply * Sensor calibration * Single-channel, 1024-/256-position resolution * 20 kΩ, 50 kΩ, 100 kΩ nominal resistance * Maximum ±1% nominal resistor tolerance error * 50-times programmable (50-TP) wiper memory * Rheostat mode temperature coefficient: 5 ppm/°C * 2.7 V to 5.5 V single-supply operation * ±2.5 V to ±2.75 V dual-supply operation for ac or bipolar operations https://elecena.pl/product/1048844/256-position-1-resistor-tolerance-error-ic-interface-and-50-tp-memory-digital-rheostat 2010-05-12 https://elecena.pl/product/1048844/256-position-1-resistor-tolerance-error-ic-interface-and-50-tp-memory-digital-rheostat 2018-03-28 https://elecena.pl/product/1048844/256-position-1-resistor-tolerance-error-ic-interface-and-50-tp-memory-digital-rheostat 2025-01-21