256‐position SPI Compatible Digital Potentiometer (POT)

The CAT5172 is a 256-position digital linear taper potentiometer ideally suited for replacing mechanical potentiometers and variable resistors. Like mechanical potentiometers, the CAT5172 has a resistive element, which can span VCC to Ground or float anywhere between the power supply rails.

Wiper settings are controlled through an SPI-compatible digital interface. Upon power-up, the wiper assumes a mid-span position and may be repositioned anytime after the power is stable.

Features

• 256-position

• End-to-End Resistance: 50 kΩ, 100 kΩ

• SPI Compatible Interface

• Power-on Preset to Midscale

• Single Supply 2.7 V to 5.5 V

• Low Temperature Coefficient 100 ppm/°C

• Low Power, IDD 2 μA max

• Wide Operating Temperature −40°C to +85°C

• SOT−23 8-lead (2.9 mm x 3 mm) Package

• These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS Compliant

Typical Applications

• Potentiometer Replacement

• Transducer Adjustment of Pressure, Temperature, Position, Chemical, and Optical Sensors

• RF Amplifier Biasing

• Gain Control and Offset Adjustment