AD5204BRU50-REEL7

Overview

The AD5204BRU50-REEL7 is a quad-channel digital potentiometer IC from Analog Devices, featuring 256 programmable positions per channel. It operates on a single supply of +2.7 V to +5.5 V or a dual supply of ±2.3 V to ±2.7 V. The device utilizes a 3-wire SPI-compatible serial interface for data input and includes an SDO pin for daisy-chaining. Each channel provides a nominal resistance of 50 kΩ with a temperature coefficient of 700 ppm/°C. The unit is housed in a 24-lead TSSOP package and supports operation within an industrial temperature range of −40°C to +85°C.

Feature Summary

• Quad-channel architecture with 256 independent tap positions
• 50 kΩ nominal end-to-end resistance with linear taper
• 3-wire SPI-compatible serial interface with daisy-chain capability via SDO
• Power-on midscale preset and hardware reset (PR) pin functionality

Applications

• Mechanical potentiometer replacement in embedded systems
• Instrumentation gain and offset adjustment circuits
• Programmable voltage-to-current conversion stages
• Line impedance matching networks

Procurement Notes

Verify the specific suffix 'RU' confirms the TSSOP-24 package variant rather than SOIC or LFCSP options. Confirm the '50' designation matches the required 50 kΩ terminal resistance. Ensure the reel packaging aligns with automated assembly requirements. Cross-reference the revision level against current design specifications.

Selection Notes

Select this component when four independent variable resistors are required in a compact surface-mount form factor. The 50 kΩ value suits moderate impedance applications where 10 kΩ or 100 kΩ variants are unsuitable. Verify that the volatile memory behavior meets system power-loss requirements, as settings are not retained without external backup logic.

Part Context

This part belongs to the AD5204 family of 4-channel digital potentiometers. It shares functional similarities with the AD5206 (6-channel) but differs in pin count and channel density. The BRU50 suffix specifically denotes the commercial grade, 50 kΩ resistance, and TSSOP-24 packaging configuration within the broader AD5204 product line.

Replacement Considerations

Direct pin-compatible replacements include other AD5204 variants with different resistance values (e.g., AD5204BRZ10 for 10 kΩ). For higher channel counts, the AD5206 series may be considered if the footprint allows. Verify thermal resistance characteristics if replacing SOIC versions with TSSOP.