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