AD5222BRU100

Overview

The AD5222BRU100 is a dual-channel, 128-position digital potentiometer in a TSSOP-14 package. It features a nominal end-to-end resistance of 100 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 of ±2.7 V, it consumes a maximum of 40 µA. The device uses an Increment/Decrement interface controlled by CS, CLK, and U/D pins, allowing push-button operation without a microcontroller. It powers on to a centered wiper position.

Feature Summary

• Dual-channel architecture with 128 tap positions per channel
• 100 kΩ nominal resistance with 1% channel-to-channel matching
• Increment/Decrement control interface for direct push-button operation
• Power-on reset centers wipers for symmetric initial resistance

Applications

• Stereo channel audio level control
• Mechanical potentiometer replacement in test equipment
• Remote incremental adjustment applications
• Instrumentation gain and offset adjustment

Procurement Notes

Verify the specific suffix 'RU' confirms the TSSOP-14 package variant rather than the standard SO-14. Confirm the '100' designation matches the required 100 kΩ resistance value. Check manufacturing date codes as this component may be subject to obsolescence management given its publication era.

Selection Notes

Select this model when a 100 kΩ resistance range is required. Ensure the application supports the Increment/Decrement logic interface; SPI-compatible alternatives like the AD5203 are needed for serial bus integration. Verify that the 40 µA power consumption fits the system budget and that the -40°C to +85°C industrial temperature range meets environmental requirements.

Part Context

This component belongs to the AD5222 family of dual digital potentiometers. The BRU100 suffix specifically denotes the Industrial temperature grade (-40°C to +85°C), the TSSOP-14 surface-mount package, and the 100 kΩ terminal resistance. Other variants exist for different resistances (10k, 50k, 1M) and packages (SOIC).

Replacement Considerations

For SPI interfaces, consider the AD5203 or AD5206. For voltage mode DACs, the AD5622 is a functional alternative. Direct pin-for-pin replacements for the Increment/Decrement interface are limited within the same family.