AD5222BR50

Overview

The AD5222BR50 is a dual-channel, 128-position digitally controlled variable resistor with a nominal end-to-end resistance of 50 kΩ. It operates on a single supply from 2.7 V to 5.5 V or a dual supply up to ±2.7 V. The device features a simple digital interface using Chip Select (CS), Clock (CLK), and Up/Down (U/D) inputs for position control. Key electrical parameters include a maximum power dissipation of 400 mW at 5 V, a wiper resistance of 45–100 Ω, and a temperature coefficient of –35 ppm/°C. It is housed in an SO-14 package and supports industrial temperatures from –40°C to +85°C.

Feature Summary

• Dual channel architecture with independent or common mode operation via MODE pin
• 128-position resolution with 50 kΩ nominal terminal resistance
• Low power consumption with 40 mA maximum supply current
• Push-button controllable interface eliminating microcontroller requirements

Applications

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

Procurement Notes

Verify the specific ordering suffix 'R' confirms the SO-14 surface-mount package variant. Confirm the '50' designation matches the required 50 kΩ terminal resistance value. Ensure the 'BR' suffix aligns with the specified –40°C to +85°C extended industrial temperature range. Cross-reference the datasheet revision to ensure compatibility with design specifications.

Selection Notes

Select this model when a 50 kΩ resistance value is required for the variable resistor function. Consider the 128-position resolution for applications needing moderate adjustment granularity. Evaluate the 40 mA max current against system power budgets. Choose between common mode (preserving relative wiper distance) and independent mode based on whether synchronized or separate channel adjustment is needed.

Part Context

This component belongs to the AD5222 family of dual digital potentiometers. Other variants in the series offer different terminal resistances including 10 kΩ, 100 kΩ, and 1 MΩ. Alternative packages such as TSSOP-14 are available for space-constrained designs. Related SPI-compatible products include the AD5203 and AD8400 series for applications requiring serial interface protocols instead of push-button control.

Replacement Considerations

Direct functional substitutes within the same family include the AD5222BR10, AD5222BR100, and AD5222BR1M, which share identical pinouts and control logic but differ in terminal resistance values. For compact layouts, the AD5222BRU50 offers the same electrical characteristics in a TSSOP-14 package.