双数字可编程电位计（ DPPA ?? ¢ ）与64丝锥和2线接口 Dual Digitally Programmable Potentiometers DPP⢠with 64 Taps and 2-wire Interface
The CAT5419 is two digital POTs integrated with control logic and 16 bytes of NVRAM memory. A separate 6-bit control register WCR independently controls the wiper tap position for each digital POT. Associated with each wiper control register are four 6-bit nonvolatile 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 I²C-like. On power-up, the contents of the first data register DR0 for each of the two potentiometers is automatically loaded into its respective wiper control registers WCR. pin protects against inadvertent programming of the data register.The CAT5419 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 2-wire interface I²C like
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- Low wiper resistance, typically 80 Ω
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- Four non-volatile wiper settings for each potentiometer
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- Recall of 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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- Write protection for data register
