AD5270BRMZ-100

The AD5270/AD5271 are single-channel, 1024-/256-position digital rheostats that combine industry leading variable resistor performance with nonvolatile memory (NVM) in a compact package. The AD5270/AD5271 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 AD5270/AD5271 device wiper settings are controllable through the SPI digital interface. Unlimited adjustments are allowed before programming the resistance value into the 50-TP memory. The AD5270/AD5271 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 resistance position (analogous to placing epoxy on a mechanical trimmer). The AD5270/AD5271 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

Key features

• 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
• SPI-compatible interface
• Wiper setting readback
• Power on refreshed from 50-TP memory
• Thin LFCSP, 10-lead, 3 mm×3 mm×0.8 mm package
• Compact MSOP, 10-lead, 3 mm×4.9 mm×1.1 mm package