General Description

The MAX5427/MAX5428/MAX5429 linear-taper digital potentiometers function as mechanical potentiometers, but replace the mechanics with a simple 2-wire digital interface. These digital potentiometers are unique in that they have an optional one-time programmable feature that either sets the wiper’s power-on reset (POR) position to a user-defined value, or the wiper can be set and the interface disabled to prevent further adjustment.

Features

♦ Wiper Position Stored After One-Time Fuse

   Programming

♦ User-Defined Power-On Reset Position

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

   and 5ppm/°C Ratiometric Temperature Coefficient

♦ 32 Tap Positions

♦ Tiny 8-Pin Thin QFN and µMAX Packages

♦ Ultra-Low 1.5µA (max) Static Supply Current

♦ 2.7V to 5.5V Single-Supply Operation

♦ Wiper Position Programmed Through Simple

   2-Wire Serial Interface

♦ 10kΩ, 50kΩ, and 100kΩ End-to-End Resistances

Applications

   Mechanical Potentiometer Replacement

   Products Using One-Time Factory Calibration