AD5204BRUZ50

Overview

The AD5204BRUZ50 is a quad-channel, 8-bit digital potentiometer with 256 tap positions and a nominal terminal resistance of 50 kΩ. It operates on a single supply from 2.7 V to 5.5 V or dual supplies up to ±2.7 V. The device uses a 3-wire SPI-compatible serial interface for independent channel programming. Key electrical parameters include a typical wiper resistance of 100 Ω, a temperature coefficient of 700 ppm/°C, and a maximum power dissipation of 0.3 mW. It features volatile memory, a power-on midscale preset, and an open-drain SDO pin for daisy-chaining.

Feature Summary

• Quad-channel architecture with 256-position resolution per channel
• 50 kΩ nominal end-to-end resistance with ±30% tolerance
• 3-wire SPI-compatible serial interface (SDI, CLK, CS)
• Power-on midscale preset via internal circuitry or PR pin

Applications

• Mechanical potentiometer replacement in embedded systems
• Programmable gain and offset adjustment in instrumentation
• Line impedance matching and programmable voltage-to-current conversion

Procurement Notes

Verify the package type matches the design requirements; the BRUZ suffix indicates a 24-lead TSSOP package. Confirm that the system can tolerate volatile memory behavior, as settings are lost upon power loss. Ensure the PCB layout accounts for the specific thermal resistance characteristics of the TSSOP package during operation.

Selection Notes

Select this component when four independent variable resistors are required in a compact surface-mount form factor. The 50 kΩ value is suitable for moderate current applications where lower power consumption is prioritized over high bandwidth. Verify that the host controller supports the required 3-wire serial protocol timing constraints.

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 BRUZ50 variant specifically denotes the 50 kΩ resistance option housed in a 24-lead Thin Shrink Small Outline Package (TSSOP).

Replacement Considerations

Direct pin-compatible replacements within the same family include the AD5204BRZ50 (SOIC package) or other resistance variants like AD5204BRU10 (10 kΩ) if the resistance value change is acceptable.