Description

The AD5291 and AD5292 are single-channel, 256-/1024-position digital potentiometers that are designed to provide industry-leading variable resistor performance with nonvolatile memory (NVM) in a compact package.

Specifications and features

• Single-channel, 256-/1024-position resolution
• Nominal resistance options: 20 kΩ, 50 kΩ, and 100 kΩ
• Maximum ±1% nominal resistor tolerance error in 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
• SPI-compatible serial interface
• Wiper setting readback
• Power-on refreshed from 20-TP memory

Application Scenarios

This digital potentiometer model is ideal for various applications, such as:

• Mechanical potentiometer replacement
• Gain and offset adjustment in instrumentation
• Programmable voltage-to-current conversion
• Programmable filters, delays, and time constants
• Programmable power supply
• Low resolution DAC replacement
• Sensor calibration

Comparison

• Industry-leading variable resistor performance
• Nonvolatile memory (NVM) in a compact package
• Less than 1% end-to-end resistor tolerance error
• Wide operating 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
• 20-time programmable (20-TP) memory
• SPI-compatible serial interface

• No major disadvantages were found in this model.