AD5204BRU10

Overview

The AD5204BRU10 is a quad-channel, 256-position digitally controlled variable resistor from Analog Devices. It features a nominal terminal resistance of 10 kΩ with a temperature coefficient of 700 ppm/°C. The device operates on a single supply of +2.7 V to +5.5 V or dual supplies of ±2.7 V. It utilizes a 3-wire SPI-compatible serial interface for control and includes volatile memory that retains settings during shutdown. Key electrical parameters include a typical wiper resistance of 50 Ω at 5 V, a bandwidth of 721 kHz for the 10 kΩ version, and a power-on midscale preset.

Feature Summary

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

Applications

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

Procurement Notes

Verify the package type matches the design requirements, as the BRU suffix indicates a TSSOP-24 package. Confirm the '10' suffix corresponds to the 10 kΩ resistance value. Ensure the system design accounts for the volatile nature of the RDAC latches, requiring state restoration upon power loss unless a hardware reset is utilized.

Selection Notes

Select this component when four independent digital potentiometers are required in a single package. The 10 kΩ resistance offers a higher bandwidth (721 kHz) compared to higher resistance variants. Consider the 50 Ω wiper resistance and ±30% tolerance for precision applications. The device supports both single and dual supply configurations, offering flexibility for various logic levels.

Part Context

The AD5204BRU10 belongs to the AD5204/AD5206 family of digital potentiometers. While the AD5204 provides four channels, the AD5206 variant offers six channels. Both share similar electrical characteristics and interfaces. This specific part is distinguished by its 10 kΩ resistance value and TSSOP packaging, differentiating it from 50 kΩ or 100 kΩ versions and SOIC/LFCSP packages.

Replacement Considerations

Direct functional substitutes within the same family include the AD5204BRZ10 (SOIC-24 package) and AD5204LFCP10 (LFCSP-32 package). For applications requiring more channels, the AD5206 series is compatible but requires pinout adaptation. Non-family replacements must match the 256-position resolution, SPI interface, and 10 kΩ resistance value.