描述 Description

The CAT5172 is a 256-position linear taper digital POT 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.The CAT5172 operates from 2.7 V to 5.5 V, while consuming less than 2 μA. This low operating current, combined with a small package footprint, makes the CAT5172 ideal for battery powered portable appliance.

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

應(yīng)用 Application

? Potentiometer Replacement
? Transducer Adjustment of Pressure, Temperature, Position, Chemical, and Optical Sensors
? RF Amplifier Biasing
? Gain Control and Offset Adjustment
? Industrial Equipment

簡(jiǎn)介

CAT5172屬于集成電路（IC）的數(shù)字電位計(jì)。由制造生產(chǎn)的CAT5172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。