MAX5477ETE+T

Overview

The MAX5477ETE+T is a dual, nonvolatile, linear-taper digital potentiometer featuring 256 tap positions per channel. It operates on a single supply voltage ranging from +2.7V to +5.25V with a maximum static supply current of 1µA. The device provides a nominal end-to-end resistance of 10kΩ and utilizes an I²C-compatible serial interface for communication at data rates up to 400kbps. Key electrical characteristics include ±1 LSB integral nonlinearity (INL) and ±0.5 LSB differential nonlinearity (DNL) in voltage-divider mode. The unit is housed in a 16-pin 3mm x 3mm x 0.8mm TQFN package with an exposed paddle and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Dual-channel architecture with 256 tap points and nonvolatile EEPROM storage for power-on wiper recall.
• I²C-compatible 2-wire serial interface supporting fast-mode speeds up to 400kbps with three address inputs.
• Low power consumption with 1µA maximum static supply current and single-supply operation from 2.7V to 5.25V.
• High precision performance including ±1 LSB INL, ±0.5 LSB DNL, and low temperature coefficients (70ppm/°C end-to-end).

Applications

• Mechanical potentiometer replacement in space-constrained designs.
• Low-drift programmable-gain amplifier circuit configurations.
• Liquid-crystal display (LCD) contrast control systems.

Procurement Notes

Verify the component authenticity by checking the top marking 'ABO' against the ordering information table. Confirm the package type is the 16-pin TQFN-EP variant. Ensure the datasheet revision matches the technical specifications provided. Cross-reference the manufacturer part number with authorized distributor listings to confirm availability status and lead times prior to procurement.

Selection Notes

Select the MAX5477ETE+T when a 10kΩ nominal resistance is required; alternative models in the series offer 50kΩ or 100kΩ options. Choose this specific package if board space is limited, as it offers a smaller footprint compared to the TSSOP variant. Consider the I²C interface requirements and ensure the system supports the necessary pull-up resistors for SDA and SCL lines. Verify that the nonvolatile memory endurance meets the application's write cycle expectations.

Part Context

This component belongs to the MAX5477/MAX5478/MAX5479 family of dual, 256-tap, nonvolatile digital potentiometers. The MAX5477 specifically denotes the 10kΩ resistance variant within this series. These devices are designed to replace mechanical potentiometers while offering digital control via a simple serial interface. The family shares identical pinouts and functional characteristics, differing primarily in resistance values and package options.

Replacement Considerations

Direct substitutes within the same family include the MAX5478ETE+T (50kΩ) and MAX5479ETE+T (100kΩ), which share the same package and interface but differ in resistance values. Other packages such as the MAX5477EUD+ (14-pin TSSOP) provide equivalent functionality with a different physical form factor. Ensure any replacement maintains the required resistance tolerance and interface compatibility.