DESCRIPTION
The CAT5126 is a digital programmable potentiometer. The wiper position is controlled with a simple 2-wire digital interface. This digital potentiometer is unique in that it has an optional onetime programmable feature that either sets the wiper’s position upon power-on to a user-defined value, or the wiper can be set and the interface also disabled to prevent further adjustment.

FEATURES
■ Wiper position stored after one-time nonvolatile programming
■ User-defined Power-On wiper position
■ 32-tap positions
■ Wiper position programmed through simple 2-wire serial interface
■ Low 0.35 µA (typ) static supply current
■ 2.5 V to 5.5 V single-supply operation
■ 10 kΩ, 50 kΩ, and 100 kΩ end-to-end resistances
■ 50 ppm/°C end-to-end temperature coefficient and 5 ppm/°C ratiometric temperature coefficient
■ TDFN 8-pad (2 x 3 mm) and MSOP 8-lead packages

APPLICATIONS
■ Mechanical potentiometer replacement
■ Products using one-time factory calibration
■ Contrast, brightness, volume controls
■ Programmable analog functions