MAX5424ETA+T

Overview

The MAX5424ETA+T is a single-channel, nonvolatile digital potentiometer with a nominal end-to-end resistance of 200kΩ and 256 tap positions. It operates on a single supply voltage ranging from +2.7V to +5.25V. The device features a 3-wire SPI-compatible serial interface for wiper control and includes internal EEPROM to retain the wiper position during power cycles. Key electrical characteristics include a ±0.5 LSB integral nonlinearity (INL) and differential nonlinearity (DNL) in voltage-divider mode, a 35ppm/°C end-to-end temperature coefficient, and a typical standby supply current of 0.5µA.

Feature Summary

• Nonvolatile memory retains wiper position upon power-up or via interface command
• SPI-compatible 3-wire serial interface supporting data rates up to 5MHz
• Linear taper with 256 tap points and ±0.5 LSB INL/DNL in voltage-divider mode
• Low standby current of 0.5µA typical and 35ppm/°C end-to-end temperature coefficient

Applications

• Mechanical potentiometer replacement
• Low-drift programmable gain amplifier circuits
• Audio volume control
• Liquid-crystal display (LCD) contrast control
• Low-drift programmable filters

Procurement Notes

Verify the component authenticity by checking the manufacturer marking 'AIH' on the 8-pin TDFN package. Confirm the ordering suffix '+T' indicates tape-and-reel packaging with a standard factory quantity of 2,500 units. Ensure the specific part number matches the datasheet revision and that RoHS compliance documentation is available for regulatory requirements.

Selection Notes

Select the MAX5424ETA+T when a 200kΩ nominal resistance is required; the MAX5422 offers 50kΩ and the MAX5423 offers 100kΩ. This device is suitable for applications requiring low-temperature-coefficient variable resistors due to its 5ppm/°C ratiometric temperature coefficient. Ensure the system voltage falls within the 2.7V to 5.25V range and that the SPI interface timing constraints are met for reliable communication.

Part Context

The MAX5424ETA+T belongs to the MAX5422/MAX5423/MAX5424 family of 256-tap, nonvolatile, SPI-interface digital potentiometers. These devices replace mechanical potentiometers using a simple digital interface. The family shares identical pinouts, functional diagrams, and nonvolatile memory reliability specifications, differing primarily in their nominal end-to-end resistance values.

Replacement Considerations

Direct functional substitutes within the same package and specification profile include the MAX5422ETA+T (50kΩ) and MAX5423ETA+T (100kΩ). Verify that the alternative resistance value meets the circuit requirements before substitution.