AD5220BR100-REEL7

Overview

The AD5220BR100-REEL7 is a single-channel, 100 kΩ digital potentiometer IC from Analog Devices. It features 128 tap positions controlled via an Up/Down serial interface with Clock and Chip Select inputs. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V, drawing a typical supply current of 15 µA at 5 V. It utilizes volatile memory, resetting to the midscale position upon power-up. Packaged in an 8-lead SOIC (R-8) in a tape-and-reel format, it supports linear taper resistance profiles within an operating temperature range of -40°C to +85°C.

Feature Summary

• 100 kΩ nominal end-to-end resistance with 128 programmable wiper positions
• Up/Down serial control interface requiring only three pins (CLK, CS, U/D)
• Single-supply operation from 2.7 V to 5.5 V with low 15 µA typical current consumption
• Volatile wiper storage with automatic power-on reset to midscale

Applications

• Mechanical potentiometer replacement in industrial controls
• Programmable gain amplifiers and offset adjustment circuits
• Digital volume control in audio signal paths
• Programmable filters and time constant adjustment

Procurement Notes

Verify the specific suffix '-REEL7' confirms the tape-and-reel packaging configuration for automated assembly. Confirm RoHS compliance status as indicated by the 'Z' designation in standard part numbers, though this specific variant requires datasheet cross-reference. Ensure the 100 kΩ resistance value matches the circuit requirements, as other variants exist for 10 kΩ and 50 kΩ.

Selection Notes

Select this component when a simple Up/Down interface is preferred over SPI or I2C protocols. The 100 kΩ resistance value offers lower power consumption compared to lower resistance options but results in reduced bandwidth (69 kHz at 100 kΩ vs 650 kHz at 10 kΩ). Consider the volatile nature of the memory; if non-volatile retention is required, alternative models such as the AD5292 series should be evaluated.

Part Context

This part belongs to the AD5220 family of single-channel digital potentiometers. It shares the same core architecture and interface as the AD5220BR10 (10 kΩ) and AD5220BR50 (50 kΩ), differing primarily in the internal resistor string value. The BR100 variant is specifically designed for applications requiring higher impedance levels to minimize quiescent current draw.

Replacement Considerations

Direct pin-compatible substitutes include AD5220BR100 and AD5220BRZ100. For non-volatile memory requirements, consider the AD5292 series. For I2C interfaces, the AD5248 series is an alternative but requires different control logic.