Quad Digitally Controlled Variable Resistors Low Noise, Low Power I2C Bus, 256 Taps

The ISL90842 integrates four digitally controlled potentiometers (DCP) configured as variable resistors on a monolithic CMOS integrated circuit.

The digitally controlled potentiometers are implemented with a combination of resistor elements and CMOS switches. The position of the wipers are controlled by the user through the I2C bus interface. Each potentiometer has an associated Wiper Register (WR) that can be directly written to and read by the user. The contents of the WR controls the position of the wiper.

Features

• Four variable resistors in one package

• 256 resistor taps - 0.4 resolution

• I2C serial interface

• Wiper resistance: 70Ω typical @ 3.3V

• Standby current <5µA max

• Power supply: 2.7V to 5.5V

• 50kΩ, 10kΩ total resistance

• 14 Lead TSSOP

• Pb-free plus anneal available (RoHS compliant)

ISL90842WIV1427Z属于集成电路（IC） > 数字电位计。瑞萨科技有限公司制造生产的ISL90842WIV1427Z数字电位计数字电位器是一系列集成电路器件，可提供类似于传统机械电位器或变阻器的可调节电阻，但通过电子信号而非机械输入来进行控制。虽然这些器件的电阻可耗散的电能相对有限，但其电子控制能力有助于小型化、自动化和远程控制信号级模拟电路，而这些电路本来可能会使用机械电位器。