AD5204BR10

Overview

The AD5204BR10 is a four-channel, 256-position digitally controlled variable resistor from Analog Devices. It operates on a single +2.7 V to +5.5 V supply or ±2.7 V dual supply. The device features a 10 kΩ nominal terminal resistance with a 700 ppm/°C temperature coefficient. Control is managed via a 3-wire SPI-compatible serial interface using an 11-bit data word. Key electrical parameters include a typical wiper resistance of 50 Ω to 100 Ω and a power-on midscale preset. The component supports daisy-chaining through an SDO pin and includes a shutdown mode for low-power applications.

Feature Summary

• Four independently programmable channels with 256 digital positions
• 10 kΩ fixed terminal resistance (nominal)
• 3-wire SPI-compatible serial interface with daisy-chain capability
• Power-on midscale preset and hardware reset functionality

Applications

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

Procurement Notes

Verify the specific package type required for the design, as the AD5204 is available in 24-lead SOIC, 24-lead TSSOP, and 32-lead LFCSP variants. Confirm that the 10 kΩ resistance value aligns with the circuit requirements, as other values like 50 kΩ and 100 kΩ exist in the series. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS input structure.

Selection Notes

Select this component when a multi-channel digital rheostat is needed with SPI compatibility. The 10 kΩ version offers higher bandwidth (721 kHz) compared to higher resistance options. Consider the LFCSP package if board space is limited, noting its lower thermal resistance. Verify that the system logic levels match the specified VIH/VIL thresholds for the chosen supply voltage.

Part Context

This part belongs to the AD5204/AD5206 family of digital potentiometers. The AD5204 provides four channels, while the AD5206 provides six. Both share similar control interfaces and electrical characteristics but differ in channel count and pin configurations. The BR suffix typically indicates a specific tape and reel packaging option within the broader product line.

Replacement Considerations

Direct replacements include other AD5204 variants with different resistance values (e.g., AD5204BR50, AD5204BR100) or packages. For single-channel needs, the AD8400 is a compatible alternative. Ensure any substitute maintains the 256-position resolution and SPI interface compatibility.