The AD5272/AD5274BCPZ-100 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/AD5274BCPZ-100 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/AD5274BCPZ-100 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/AD5274BCPZ-100 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/AD5274BCPZ-100 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.
Feature
- 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 orbipolar 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
(Picture: Pinout)
