MAX5418LETA+T

Overview

The MAX5418LETA+T is a single-channel, nonvolatile digital potentiometer featuring a 100kΩ end-to-end resistance and 256 tap positions. It utilizes a fast-mode I²C-compatible serial interface for wiper control. The device incorporates internal EEPROM to store the wiper position, enabling power-on recall. Electrical specifications include ±0.5 LSB INL and DNL in voltage-divider mode, a 35ppm/°C end-to-end temperature coefficient, and a 5ppm/°C ratiometric coefficient. It operates on a single supply from +2.7V to +5.25V with a typical standby current of 500nA.

Feature Summary

• Nonvolatile memory retains wiper position across power cycles
• Fast-mode I²C serial interface supporting up to 400kbps
• Linear taper with 256 discrete tap points
• Low ratiometric temperature coefficient of 5ppm/°C

Applications

• Mechanical potentiometer replacement
• Low-drift programmable-gain amplifier circuits
• LCD contrast control
• Volume control systems

Procurement Notes

Verify the specific suffix 'LETA' corresponds to the required I²C address configuration (010100A) and package type (8-pin TDFN). Confirm RoHS compliance status via the manufacturer's official documentation. Ensure the ordering part number matches the exact resistance value and pinout requirements for the target design.

Selection Notes

Select this component when a 100kΩ digital potentiometer with nonvolatile storage is required. The MAX5418 variant provides the specific 100kΩ resistance; choose MAX5417 for 50kΩ or MAX5419 for 200kΩ if different values are needed. The 'L' suffix indicates a factory-set I²C address, while the 'A0' pin allows toggling between two addresses within that group.

Part Context

This component belongs to the MAX5417/MAX5418/MAX5419 family of 256-tap nonvolatile digital potentiometers. All variants share identical pinouts, interfaces, and electrical characteristics, differing only in nominal end-to-end resistance values. The MAX5418 specifically denotes the 100kΩ resistance option within this series.

Replacement Considerations

Public confirmed substitute part numbers: MAX5417LETA+T, MAX5419LETA+T.