AD5222BR10

Overview

The AD5222BR10 is a dual-channel, 128-position digital potentiometer from Analog Devices. It features two independent variable resistors with a nominal end-to-end resistance of 10 kΩ and a temperature coefficient of –35 ppm/°C. The device operates on a single supply of 2.7 V to 5.5 V or a dual supply of ±2.7 V. It utilizes an increment/decrement interface controlled by CS, CLK, and U/D inputs, allowing push-button operation without a microcontroller. Key electrical parameters include a maximum supply current of 40 mA, wiper resistance of 45 Ω (typical), and a settling time of 2 ms for the 10 kΩ version.

Feature Summary

• Dual-channel architecture with 128 tap positions per channel
• Increment/Decrement control interface compatible with mechanical switches
• Nominal resistance of 10 kΩ with ±30% tolerance and –35 ppm/°C temperature coefficient
• Low power consumption with 40 µA maximum supply current

Applications

• Stereo channel audio level control
• Mechanical potentiometer replacement in instrumentation
• Remote incremental adjustment applications
• Programmable voltage-to-current conversion

Procurement Notes

Verify the specific ordering suffix 'R-14' confirms the SO-14 surface-mount package when sourcing. Confirm the 'BR' designation indicates the industrial temperature range of –40°C to +85°C. Ensure compatibility with the required 10 kΩ nominal resistance value for the target circuit design.

Selection Notes

Select this model for applications requiring precise electronic adjustment of resistance values without mechanical wear. The 10 kΩ variant offers a bandwidth of 1 MHz at mid-scale. Consider the 45 Ω typical wiper resistance for low-voltage signal paths. The simple serial interface reduces component count compared to SPI-compatible alternatives.

Part Context

This component belongs to the AD5222 family of dual digital potentiometers. Other variants in the series offer different nominal resistances including 50 kΩ, 100 kΩ, and 1 MΩ. Alternative packages such as TSSOP-14 are available under the AD5222BRU10 designation. The device serves as an electronic alternative to traditional mechanical potentiometers in test and measurement equipment.

Replacement Considerations

Direct pin-compatible replacements within the same package include other AD5222 variants with different resistance values (e.g., AD5222BR50). For SPI interfaces, consider the AD5203 or AD8400 series, though these require different control logic.