AD5220BRM10

Overview

The AD5220BRM10 is a single-channel, 7-bit digitally controlled variable resistor (digital potentiometer) manufactured by Analog Devices Inc. It features a nominal resistance of 10 kΩ with 128 tap positions and volatile memory that retains the wiper setting during operation but loses it upon power loss. The device operates on a supply voltage range of 2.7 V to 5.5 V and utilizes a standard three-wire serial interface consisting of Chip Select (CS), Clock (CLK), and Up/Down (U/D) inputs for control. Packaged in an 8-lead Mini Small Outline Package (MSOP), it supports both rheostat and potentiometer divider modes.

Feature Summary

• Seven-bit resolution providing 128 discrete wiper positions for precise resistance adjustment.
• Three-wire serial interface compatible with standard CMOS logic families using CS, CLK, and U/D pins.
• Nominal resistance of 10 kΩ with a temperature coefficient of 800 ppm/°C and ±30% tolerance at +25°C.
• Operates within a wide supply voltage range of 2.7 V to 5.5 V with low standby current.

Applications

• Programmable gain amplifiers requiring digital control over gain settings.
• Voltage reference trimming and calibration circuits.
• Audio volume control applications utilizing the potentiometer divider mode.
• Variable attenuator circuits in signal processing chains.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status as indicated by the 'Z' suffix in ordering guides, noting that specific suffixes may denote packaging variations rather than functional changes. Ensure ESD precautions are observed during handling due to the sensitivity of the internal CMOS circuitry.

Selection Notes

Select this model when a single-channel variable resistor with 10 kΩ nominal value is required. The BRM variant indicates an MSOP package suitable for surface mount applications. Consider the volatile memory characteristic; if non-volatile storage is needed for power-down retention, alternative models such as the AD5248 should be evaluated. Verify that the 128-position resolution meets the application's precision requirements.

Part Context

This component belongs to the AD5220 family of single-channel digital potentiometers. The 'BRM' designation specifies the commercial temperature range (-40°C to +85°C) and the 8-lead MSOP package option. The trailing '10' denotes the 10 kΩ nominal end-to-end resistance. Other variants in the series include 50 kΩ and 100 kΩ versions, as well as automotive qualified models designated with a 'W' prefix.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Analog Devices for cross-reference recommendations based on specific pinout and electrical parameter compatibility.