CAT5221WI00

双数字可编程电位计（ DPP ™ ）与64丝锥和I2C接口 Dual Digitally Programmable Potentiometer DPP™ with 64 Taps and I2C Interface

The CAT5221 is two digital POTs integrated with control logic and 16 bytes of EEPROM memory. Each digital POT 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. A separate 6-bit control register WCR independently controls the wiper tap switches for each digital POT. Associated with each wiper control register are four 6-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 I²C 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 WCR.The CAT5221 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.

Features

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Two linear-taper digital potentiometers

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64 resistor taps per potentiometer

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End to end resistance 2.5 kΩ, 10 kΩ, 50 kΩ or 100 kΩ

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Potentiometer control and memory access via I²C interface

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Low wiper resistance, typically 80 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 1.0 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 ranges