MAX5428ETA-T

Overview

The MAX5428ETA-T is a single-channel digital potentiometer IC manufactured by Analog Devices Inc./Maxim Integrated. It features a 50 kOhm resistance value with 32 taps and utilizes a linear taper profile. The device employs a non-volatile memory architecture for wiper storage, ensuring data retention without power. Communication is handled via a serial 2-wire interface. It operates within a supply voltage range of 2.7 V to 5.5 V and draws a typical operating current of 1.5 uA. The component is housed in an 8-lead TDFN package with an exposed pad (TDFN-8 EP) and supports surface-mount installation across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Non-volatile memory retains wiper settings after power loss
• Serial 2-wire interface for simplified control
• Linear taper with 32 programmable tap positions
• Low power consumption with 1.5 uA operating current

Applications

• Programmable gain amplifier circuits
• Voltage reference adjustment
• Sensor biasing and calibration
• Audio volume control applications

Procurement Notes

Verify the specific suffix designation, as the provided model includes a hyphenated 'T' which may indicate tape-and-reel packaging variations compared to standard listings. Confirm end-of-life status or obsolescence notices directly with the manufacturer or authorized distributors prior to procurement planning. Ensure compatibility with existing PCB footprints for the TDFN-8 EP package.

Selection Notes

Select this component when a single-channel digital potentiometer with non-volatile storage and a 2-wire interface is required. The 50 kOhm resistance and 32-tap resolution are suitable for moderate precision adjustments. Compare against the MAX5427 series if higher resistance values like 100 kOhm are needed, or the MAX5422 series if SPI interface and higher resolution (256 taps) are preferred.

Part Context

The MAX5428 belongs to the Maxim Integrated MAX542x family of digital potentiometers. This family offers various resistance values and interface options. The MAX5428 specifically targets applications requiring low pin count and persistent setting storage using a simple 2-wire serial bus, distinguishing it from parallel or SPI-based counterparts in the same product line.

Replacement Considerations

Direct functional substitutes within the same family include the MAX5427 (100 kOhm, 32 taps) and MAX5429 (10 kOhm, 32 taps). For interface changes, the MAX5422 (SPI, 256 taps) offers higher resolution but requires different control logic.