MAX5418PETA+T

Overview

The MAX5418PETA+T is a nonvolatile, linear-taper digital potentiometer featuring 256 tap points and an I²C-compatible serial interface. It provides a nominal end-to-end resistance of 100kΩ with a ratiometric temperature coefficient of 5ppm/°C. The device operates on a single supply voltage ranging from +2.7V to +5.25V and draws a typical standby current of 500nA. An internal EEPROM stores the wiper position for power-on recall, ensuring data retention for up to 200,000 write cycles. Packaged in a compact 3mm x 3mm 8-pin TDFN format, it supports fast-mode communication at data rates up to 400kbps.

Feature Summary

• Nonvolatile memory retains wiper position across power cycles
• I²C-compatible serial interface with four factory-preset addresses
• Linear taper with 256 discrete tap positions
• Low standby current consumption of 500nA

Applications

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

Procurement Notes

Verify the 'T' suffix indicates tape-and-reel packaging when sourcing this component. Confirm that the specific ordering code matches the required I²C address configuration, as the base model offers multiple address options. Ensure compliance with RoHS standards if applicable to the assembly process.

Selection Notes

Select the MAX5418 variant specifically for applications requiring a 100kΩ nominal resistance. Consider the MAX5417 or MAX5419 if lower or higher resistance values are needed. Verify that the system bus supports the required I²C pull-up resistors and that the operating voltage remains within the 2.7V to 5.25V range.

Part Context

This component belongs to the MAX5417/MAX5418/MAX5419 family of 256-tap nonvolatile digital potentiometers manufactured by Analog Devices / Maxim Integrated. The series shares identical pinouts and functional interfaces, differing primarily in nominal resistance values: 50kΩ, 100kΩ, and 200kΩ respectively.

Replacement Considerations

Direct replacements include other models within the MAX5417/MAX5418/MAX5419 family, provided the resistance value and I²C address match the design requirements. Cross-model substitution requires verifying that the specific resistor tolerance and temperature coefficients meet the circuit specifications.