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