描述 Description

The CAT5271 is a dual 256-positionlinear 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 go to a shutdown state during operation. The CAT5271 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 CAT5273 ideal for battery-powered portable applications. The CAT5271, designed as a pin for pin replacement for the AD5248, operates over the -40°C to +85°C industrial temperature range.

特性 Features

? Dual 256-position
? Offers high-resolution adjustment
? 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

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

CAT5271屬于集成電路（IC）的數(shù)字電位計。由制造生產的CAT5271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。