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MAX5427：32-Tap, One-Time Programmable, Linear-Taper Digital Potentiometers

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. The MAX5427 has an end-to-end resistance of 100kΩ, the MAX5428 a resistance of 50kΩ, and the MAX5429 a resistance of 10kΩ. All these devices have 32 wiper positions, operate from a single 2.7V to 5.5V supply, and use less than 1.5µA (max) static supply current. The MAX5427/MAX5428/MAX5429 are available in 8-pin thin QFN and µMAX® packages. Each device is guaranteed over the extended temperature range of -40°C to +85°C.

Key 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 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 EV Kit Available

MAX5427, MAX5428, MAX5429: Functional Block Diagram Applications/Uses Mechanical Potentiometer Replacements Products Using One-Time Factory Calibration

DataSheet

Parametrics

Design kits & evaluation modules

• MAX5427EVKIT

Ordering Information