MAX5418PETA+

Overview

The MAX5418PETA+ is a nonvolatile, linear-taper digital potentiometer featuring 256 tap points and a nominal end-to-end resistance of 100kΩ. It utilizes a fast-mode I²C-compatible serial interface for wiper control and includes internal EEPROM to store the wiper position for power-on recall. The device operates on a single supply voltage ranging from +2.7V to +5.25V with a typical standby current of 500nA. It offers low temperature coefficients of 35ppm/°C end-to-end and 5ppm/°C ratiometric, housed in an 8-pin TDFN package.

Feature Summary

• Nonvolatile memory retains wiper position across power cycles
• I²C-compatible serial interface supports data rates up to 400kbps
• Linear taper with 256 discrete tap positions
• Low ratiometric temperature coefficient of 5ppm/°C

Applications

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

Procurement Notes

Verify the specific factory-preset address associated with the 'P' suffix against the ordering information table. Confirm that the required I²C bus pullup resistors are included in the design, as they are not integrated within the component. Ensure the PCB layout accommodates the exposed pad connected to GND for thermal performance.

Selection Notes

Select this model over the MAX5417 or MAX5419 when a nominal 100kΩ resistance is required. The 'P' suffix indicates a specific factory-programmed slave address; verify compatibility with existing bus addressing schemes if multiple devices share the same I²C lines. The device supports both volatile and nonvolatile register writes for flexible wiper control strategies.

Part Context

This component belongs to the MAX5417/MAX5418/MAX5419 family of 256-tap digital potentiometers. The family shares identical pinouts, interfaces, and electrical characteristics, differing primarily in the nominal end-to-end resistance values: 50kΩ for MAX5417, 100kΩ for MAX5418, and 200kΩ for MAX5419.

Replacement Considerations

Direct functional substitutes within the same package include the MAX5417LETA+, MAX5417META+, MAX5417NETA+, MAX5417PETA+, MAX5419LETA+, MAX5419META+, MAX5419NETA+, and MAX5419PETA+. Note that these alternatives have different nominal resistances (50kΩ or 200kΩ) compared to the 100kΩ of the MAX5418PETA+.