256‐position I2C Compatible Digital Potentiometer (POT)

The CA5171 is a 256-position digital linear taper potentiometer ideally suited for replacing mechanical potentiometers and variable resistors.

The wiper settings are controlled through an I2C-compatible digital interface. Upon power-up, the wiper assumes a midscale position and may be repositioned anytime after the power is stable. The device can be programmed to reset the wiper position to midscale or to go to a shutdown state during operation. An address input pin, AD0, allows the connection of two devices onto the same I2C bus.

Features

? 256-position

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

? I2C 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 × 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

CAT5171屬于集成電路（IC） > 數(shù)字電位計(jì)。安森美半導(dǎo)體公司制造生產(chǎn)的CAT5171數(shù)字電位計(jì)數(shù)字電位器是一系列集成電路器件，可提供類(lèi)似于傳統(tǒng)機(jī)械電位器或變阻器的可調(diào)節(jié)電阻，但通過(guò)電子信號(hào)而非機(jī)械輸入來(lái)進(jìn)行控制。雖然這些器件的電阻可耗散的電能相對(duì)有限，但其電子控制能力有助于小型化、自動(dòng)化和遠(yuǎn)程控制信號(hào)級(jí)模擬電路，而這些電路本來(lái)可能會(huì)使用機(jī)械電位器。