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AD5272 Datasheet

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Description
MFG CO.
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GENERAL DESCRIPTION
The AD5272/AD52741 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.

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
  I2C-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

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

 

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