AD5222BRU10

Overview

The AD5222BRU10 is a dual-channel, 128-position digital potentiometer in a TSSOP-14 package. It features a nominal resistance of 10 kΩ with a temperature coefficient of -35 ppm/°C and channel matching tolerance of 1%. Operating on a single supply of 2.7 V to 5.5 V or dual supplies up to ±2.7 V, it consumes a maximum of 40 µA. The device uses an Increment/Decrement interface controlled by CS, CLK, and U/D inputs, allowing push-button operation without a microcontroller. It powers on with the wiper centered.

Feature Summary

• Dual-channel architecture with 128 tap positions per channel
• Increment/Decrement control interface for direct push-button integration
• Common mode (synchronized) and independent wiper adjustment modes
• Internal power-on reset centers wipers at mid-scale

Applications

• Stereo channel audio level control
• Mechanical potentiometer replacement in test equipment
• Remote incremental gain and offset adjustment
• Programmable voltage-to-current conversion

Procurement Notes

Verify the specific suffix 'RU' confirms the TSSOP-14 package variant. Confirm the '10' suffix indicates the 10 kΩ resistance value. Check for ESD handling requirements during storage and assembly due to the sensitivity of the CMOS input structure.

Selection Notes

Select this model when a simple serial-like clock interface is preferred over SPI. Ensure the application current between the wiper and terminal does not exceed 20 mA to prevent switch degradation. Verify that the 128-position resolution meets the required adjustment granularity for the target circuit.

Part Context

This component belongs to the AD5222 family of dual digital potentiometers. It serves as an electronic alternative to mechanical pots, specifically optimized for instrument front-panel controls where microcontroller overhead should be minimized. It complements SPI-based models like the AD5203 for applications requiring different interface protocols.

Replacement Considerations

For SPI-compatible interfaces, consider the AD5203 or AD5206. For non-volatile memory retention, select from the AD5122 series. Mechanical replacements require verifying pinout compatibility and resistance values.