AD5220BR100-REEL

Overview

The AD5220BR100-REEL is a single-channel digital potentiometer IC from Analog Devices, featuring a nominal resistance of 100 kΩ and 128 tap positions. It operates on a single supply voltage ranging from 2.7 V to 5.5 V with a typical supply current of 15 µA. The device utilizes an Up/Down serial interface for wiper control and includes volatile memory that resets to the midscale position upon power-up. Packaged in an 8-lead SOIC (R-8) format, it supports operation across a temperature range of -40°C to +85°C.

Feature Summary

• 100 kΩ nominal end-to-end resistance with 128 programmable tap positions
• Up/Down serial interface requiring Clock, Chip Select, and Direction pins
• Volatile wiper memory with automatic power-on midscale preset
• Single-supply operation from 2.7 V to 5.5 V

Applications

• Mechanical potentiometer replacement in industrial controls
• Programmable gain amplifiers and offset adjustment circuits
• Adjustable voltage references and programmable filters

Procurement Notes

Verify the specific reel packaging suffix against the manufacturer's ordering guide to confirm tape-and-reel specifications. Ensure the component meets RoHS compliance requirements if mandated by the design. Confirm the 100 kΩ resistance value matches the circuit design needs, as other variants exist for 10 kΩ and 50 kΩ applications.

Selection Notes

Select this model when a 100 kΩ resistance value is required for the variable resistor application. The Up/Down interface is suitable for systems using simple GPIO lines for direction and clocking. Consider the volatile memory characteristic; if non-volatile storage is necessary for wiper position retention during power loss, a different part number within the family must be selected.

Part Context

This component belongs to the AD5220 series of digitally controlled variable resistors. The 'BR' designation indicates the commercial temperature grade (-40°C to +85°C) and SOIC package. The '100' suffix specifies the 100 kΩ nominal resistance, while '-REEL' denotes the bulk reel packaging format intended for automated surface-mount assembly.

Replacement Considerations

Direct functional substitutes include other AD5220 variants with different resistance values or packages, such as AD5220BRZ100 or AD5220BRMZ100. Cross-family replacements require verification of interface compatibility and pinout alignment.