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