描述 Description

The CAT5191 is a 256-position linear taper digital POT 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.The CAT5191 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 CAT5191 ideal for battery-powered portable applications.The CAT5191 is designed as a pin for pin replacement for the AD5245 and operates over the -40°C to +85°C industrial temperature range.

特性 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
? Extended Operating Temperature -40°C to +125°C

應用 Application

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

簡介

CAT5191屬于集成電路（IC）的數字電位計。由制造生產的CAT5191數字電位計數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節(jié)電阻，但通過電子信號而非機械輸入來進行控制。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。