AD5220BR100

Overview

The AD5220BR100 is a single-channel, 7-bit digital potentiometer with a nominal resistance of 100 kΩ. It features an Up/Down (U/D) serial interface for wiper position control and volatile memory that resets to mid-scale upon power-up. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V. Key electrical characteristics include a typical wiper resistance of 40 Ω, a resistor temperature coefficient of 800 ppm/°C, and a maximum supply current of 40 mA at 5 V. It is housed in an 8-lead SOIC package.

Feature Summary

• Single channel variable resistor with 128 tap positions
• Up/Down serial interface requiring Clock, Chip Select, and Direction pins
• Volatile wiper position storage with internal power-on reset to mid-scale
• Nominal resistance options of 10 kΩ, 50 kΩ, or 100 kΩ

Applications

• Mechanical potentiometer replacement in instrumentation systems
• Programmable gain amplifier circuits
• Offset adjustment in signal conditioning chains
• Programmable voltage-to-current conversion

Procurement Notes

Verify the specific suffix against the manufacturer's ordering guide to confirm resistance value and packaging format. The BR100 designation indicates a 100 kΩ variant in an SOIC package. Confirm RoHS compliance status as indicated by Z suffixes in other variants within the same family.

Selection Notes

Select this component when a single-channel, digitally controlled resistance is required without non-volatile memory retention. Ensure the system can tolerate the 800 ppm/°C temperature coefficient of the end-to-end resistance. The U/D interface requires fewer pins than SPI but necessitates external debouncing for mechanical switch inputs.

Part Context

This part belongs to the AD5220 series of programmable resistors. It serves as a direct electronic replacement for mechanical potentiometers in applications requiring remote or automated resistance adjustment. The BR100 specifically denotes the 100 kΩ version packaged in an 8-lead Small Outline Integrated Circuit (SOIC).

Replacement Considerations

Direct pin-compatible replacements within the same package include other AD5220 variants such as AD5220BR10 (10 kΩ) or AD5220BRZ100 (RoHS compliant 100 kΩ). Verify that the substitute maintains the same 100 kΩ nominal resistance and SOIC-8 footprint.