General Description

The MAX5471/MAX5472/MAX5474/MAX5475 linear taper digital potentiometers function as mechanical potentiometers, but replace the mechanics with a simple 3-wire up/down digital interface. These digital potentiometers feature nonvolatile memory (EEPROM) to return the wiper to its previously stored position upon power-up.

The MAX5471/MAX5472 are 2-terminal, variable resistors in 6-pin SOT23 packages. The MAX5474/MAX5475 are 3-terminal potentiometers in 8-pin SOT23 packages.

Features

♦ Wiper Position Stored in Nonvolatile Memory and Recalled Upon Power-Up

♦ Tiny SOT23 Package

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

♦ 5ppm/°C Ratiometric Temperature Coefficient

♦ 32 Tap Positions

♦ Voltage-Divider or Variable-Resistor Potentiometer Configuration

♦ 50kΩ and 100kΩ End-to-End Resistance Values

♦ 1µA (max) Static Supply Current

♦ 2.7V to 5.25V Single-Supply Operation

♦ 200,000 Wiper Store Cycles

♦ 50-Year Wiper Data Retention

Applications

  Mechanical Potentiometer Replacement

  Liquid-Crystal-Display (LCD) Screen Adjustment

  Audio Volume Control

  Programmable Filters