AD5204BRZ100

Overview

The AD5204BRZ100 is a four-channel, 256-position digitally controlled variable resistor from Analog Devices. It features a nominal terminal resistance of 100 kΩ with a temperature coefficient of 700 ppm/°C and a typical wiper resistance of 100 Ω. The device operates on a single supply of +2.7 V to +5.5 V or dual supplies of ±2.3 V to ±2.7 V, drawing a maximum supply current of 60 μA. It utilizes a 3-wire SPI-compatible serial interface for programming and includes power-on midscale preset functionality.

Feature Summary

• Four independent channels with 256 programmable positions
• Nominal resistance of 100 kΩ with ±30% tolerance at 25°C
• SPI-compatible 3-wire serial interface with daisy-chain capability via SDO pin
• Power-on midscale preset and hardware reset (PR) pin

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 against the ordering suffix, as the AD5204 series is available in 24-lead SOIC, 24-lead TSSOP, and 32-lead LFCSP packages. Confirm that the BRZ suffix corresponds to the required industrial temperature range and RoHS compliance status for the target application environment.

Selection Notes

Select this component when a 100 kΩ end-to-end resistance is required for four independent channels. Ensure the design accommodates the 700 ppm/°C temperature coefficient if precision over temperature is critical. Verify that the system logic levels are compatible with the specified input voltage thresholds for the chosen supply voltage.

Part Context

This part belongs to the AD5204 family of digital potentiometers, which provides electronically adjustable resistance without mechanical wear. It serves as a direct replacement for traditional mechanical pots in applications requiring remote or automated calibration. The BRZ100 variant specifically denotes the 100 kΩ resistance value within the standard surface-mount packaging options.

Replacement Considerations

Direct functional equivalents include other AD5204 variants with different resistance values (e.g., AD5204BRZ50). For non-volatile memory requirements, consider the AD5124 series. Ensure any substitute maintains the same 256-position resolution and SPI interface compatibility.