General Description

The MAX5422/MAX5423/MAX5424 nonvolatile, linear-taper, digital potentiometers perform the function of a mechanical potentiometer, but replace the mechanics with a simple 3-wire SPI™-compatible digital interface. Each device performs the same function as a discrete potentiometer or variable resistor and has 256 tap points.

Features

♦ Wiper Position Stored in Nonvolatile Memory

   (EEPROM) and Recalled Upon Power-Up or

   Interface Command

♦ 3mm x 3mm x 0.8mm TDFN Package

♦ 35ppm/°C End-to-End Resistance Temperature

   Coefficient

♦ 5ppm/°C Ratiometric Temperature Coefficient

♦ 50kΩ, 100kΩ, and 200kΩ Resistor Values

♦ 5MHz SPI-Compatible Serial Interface

♦ 500nA (typ) Static Supply Current

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

♦ 256 Tap Positions

♦ ±0.5 LSB DNL in Voltage-Divider Mode

♦ ±0.5 LSB INL in Voltage-Divider Mode

Applications

   Mechanical Potentiometer Replacement

   Low-Drift Programmable Gain Amplifiers

   Audio Volume Control

   Liquid-Crystal Display (LCD) Contrast Control

   Low-Drift Programmable Filters