CAT5221屬于集成電路（IC）的數(shù)字電位計(jì)。由安森美半導(dǎo)體公司制造生產(chǎn)的CAT5221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。

DESCRIPTION

The CAT5221 is two Digitally Programmable Potentiometers (DPPs?) integrated with control logic and 16 bytes of NVRAM memory. Each DPP consists of a series of 63 resistive elements connected between two externally accessible end points. The tap points between each resistive element are connected to the wiper outputs with CMOS switches.

FEATURES

■ Two linear-taper digitally programmable potentiometers

■ 64 resistor taps per potentiometer

■ End to end resistance 2.5 k?, 10 k?, 50 k? or 100 k?

■ Potentiometer control and memory access via I2C interface

■ Low wiper resistance, typically 80 ?

■ Nonvolatile memory storage for up to four wiper settings for each potentiometer

■ Automatic recall of saved wiper settings at power up

■ 2.5 to 6.0 volt operation

■ Standby current less than 1μA

■ 1,000,000 nonvolatile WRITE cycles

■ 100 year nonvolatile memory data retention

■ 20-lead SOIC and TSSOP packages

■ Industrial temperature range