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 MAX5427ETA 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.
Feature
- 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
Applications
- Mechanical Potentiometer Replacements
- Products Using One-Time Factory Calibration
