Product Details
●The AD5291 and AD5292 are single-channel, 256-/1024-position digital potentiometers1 that combine industry leading variable resistor performance with nonvolatile memory (NVM) in a compact package. These devices are capable of operat-ing across a wide voltage range, supporting both dual supply operation at ±10.5 V to ±16.5 V and single supply operation at +21 V to +33 V, while ensuring less than 1% end-to-end resistor tolerance error and offering 20-time programmable (20-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 AD5291 and AD5292 device wiper settings are controllable through the SPI digital interface. Unlimited adjustments are allowed before programming the resistance value into the 20-TP memory. The AD5291 and AD5292 do not require any external voltage supply to facilitate fuse blow, and there are 20 opportunities for permanent programming. During 20-TP activation, a permanent blow fuse command freezes the wiper position (analogous to placing epoxy on a mechanical trimmer).
●The AD5291 and AD5292 are available in a compact 14-lead TSSOP package. The part is guaranteed to operate over the extended industrial temperature range of −40°C to +105°C.
●1The terms digital potentiometer and RDAC are used interchangeably.
●Applications
● Mechanical potentiometer replacement
● Instrumentation: gain and offset adjustment
● Programmable voltage-to-current conversion
● Programmable filters, delays, and time constants
● Programmable power supply
● Low resolution DAC replacement
● Sensor calibration
●### Features and Benefits
● Single-channel, 256-/1024-position resolution
● 20 kΩ, 50 kΩ, and 100 kΩ
●nominal resistance
● Maximum ±1% nominal resistor tolerance error (resistor performance mode)
● 20-times programmable wiper memory
● Rheostat mode temperature coefficient: 35 ppm/°C
● Voltage divider temperature coefficient: 5 ppm/°C
● +9 V to +33 V single-supply operation
● ±9 V to ±16.5 V dual-supply operation
● See data sheet for additional features
