CAT5172屬于集成電路（IC）的數(shù)字電位計。由安森美半導(dǎo)體公司制造生產(chǎn)的CAT5172數(shù)字電位計數(shù)字電位器是一系列集成電路器件，可提供類似于傳統(tǒng)機械電位器或變阻器的可調(diào)節(jié)電阻，但通過電子信號而非機械輸入來進(jìn)行控制。雖然這些器件的電阻可耗散的電能相對有限，但其電子控制能力有助于小型化、自動化和遠(yuǎn)程控制信號級模擬電路，而這些電路本來可能會使用機械電位器。

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.

特性 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