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