描述 Description

The CAT5259 is four digital POTs integrated with control logic and 16 bytes of NVRAM memory. Each digital POT consists of a series of 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. A separate 8-bit control register (WCR) independently controls the wiper tap switches for each digital POT. Associated with each wiper control register are four 8-bit non-volatile memory data registers (DR) used for storing up to four wiper settings. Writing to the wiper control register or any of the non-volatile data registers is via a 2-wire serial bus. On power-up, the contents of the first data register (DR0) for each of the four potentiometers is automatically loaded into its respective wiper control registers.The CAT5259 can be used as a potentiometer or as a two terminal, variable resistor. It is intended for circuit level or system level adjustments in a wide variety of applications. It is available in the 0°C to 70°C commercial and -40°C to 85°C industrial operating temperature ranges.

特性 Features

? Four linear taper digital potentiometers
? 256 resistor taps per potentiometer
? End to end resistance 50 kΩ or 100 kΩ
? Potentiometer control and memory access via 2-wire interface (I2C like)
? Low wiper resistance, typically 100 Ω
? 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 1.0 μA
? 1,000,000 nonvolatile WRITE cycles
? 100 year nonvolatile memory data retention
? Industrial temperature range

應用 Application

? Audio Equipment
? Industrial Controls
? Automobiles
? Industrial Equipment

簡介

CAT5259屬于集成電路（IC）的數(shù)字電位計。由制造生產(chǎn)的CAT5259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。