General Description

The MAX5477/MAX5478/MAX5479 nonvolatile, dual, linear-taper, digital potentiometers perform the function of a mechanical potentiometer, but replace the mechanics with a simple 2-wire digital interface. Each device performs the same function as a discrete potentiometer or variable resistor and has 256 tap points.

Features

♦ Power-On Recall of Wiper Position from Nonvolatile Memory

♦ EEPROM Write Protection

♦ Tiny 3mm x 3mm x 0.8mm Thin QFN Package

♦ 70ppm/°C End-to-End Resistance Temperature Coefficient

♦ 10ppm/°C Ratiometric Temperature Coefficient

♦ Fast 400kbps I2C-Compatible Serial Interface

♦ 1µA (max) Static Supply Current

♦ Single-Supply Operation: +2.7V to +5.25V

♦ 256 Tap Positions per Potentiometer

♦ ±0.5 LSB DNL in Voltage-Divider Mode

♦ ±1 LSB INL in Voltage-Divider Mode

Applications

    Mechanical Potentiometer Replacement

    Low-Drift Programmable-Gain Amplifiers

    Volume Control

    Liquid-Crystal Display (LCD) Contrast Control