描述 Description

The CAT5140 is a single channel non-volatile 256-tap digital POT. This digital POT is comprised of a series of equal value resistor elements connected between two externally accessible end points. The tap points between each resistive element can be selectively connected to the wiper output via internal CMOS switches forming a linear taper electronic potentiometer.The CAT5140 contains a volatile wiper register (WR) and an 8-bit non-volatile EEPROM for wiper position and 5 additional non-volatile registers for general purpose data storage. Programming of the registers is controlled via I2C interface. On power up, the wiper position is reset to the most recent value stored in the non-volatile memory register (IVR).The CAT5140 operates over the industrial temperature range of -40°C to +85°C.

特性 Features

? 400 kHz I2C Compatible Interface
? 256 Position Linear Taper Potentiometer
? End-to-End Resistance = 50 kΩ / 100 kΩ
? TCR = 100 ppm/°C (typical)
? Standby Current = 2 μA (max)
? Typical Wiper Resistance = 70 Ω @ 3.3 V
? Operating Voltage = 2.5 V to 5.5 V
? 6 Registers 8-bit Non-volatile EEPROM
? 2,000,000 Data Write Stores
? 100 Year Data Retention
? 8-Lead MSOP Package
? Pb-free RoHS Compliant: NiPdAu Plating

應(yīng)用 Application

? Gain Adjustment and Line Impedance Matching
? Automated Calibration
? Contrast, Brightness and Volume Control
? LCD Screen Adjustment
? Instrumentation for Handheld, Portable Devices
? Industrial Automation for Handheld, Portable Devices
? Portable Games

簡介

CAT5140屬于集成電路（IC）的數(shù)字電位計。由制造生產(chǎn)的CAT5140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(diào)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。