CAT5251YI50

四路数字可编程电位计（ DPP⑩ ）与256丝锥和SPI接口 Quad Digitally Programmable Potentiometer DPP™ with 256 Taps and SPI Interface

The CAT5251 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 SPI 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 register.The CAT5251 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 -40°C to 85°C industrial operating temperature range.

Features

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Four linear-taper digital potentiometers

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256 resistor taps per potentiometer

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End to end resistance 50 kΩ or 100 kΩ

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Potentiometer control and memory access via SPI interface

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Low wiper resistance, typically 100 Ω

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

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Automatic recall of saved wiper settings at power up

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2.5 to 6.0 volt operation

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Standby current less than 1 µA

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1,000,000 nonvolatile WRITE cycles

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100 year nonvolatile memory data retention

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Industrial temperature range