Can the power be shut off and turned back on in a nonvolatile digital potentiometer so it can be considered refreshed?
A. No. That only refreshes the register logic, not the EEPROM. Data will have to be reloaded again before its rated retention time–usually after at least 10 years–to put a fresh charge onto the EEPROM cell. AD5290: Compact +30-V/15-V 256-Position Digital Potentiometer Developed on ADI’s new iCMOSTM industrial process technology, the AD5290 delivers an unbeatable combination of features and performance in an ultrasmall package size. This device performs the same electronic adjustment function as traditional mechanical potentiometers or variable resistors, but with the enhanced resolution needed for high-voltage designs and the benefits of complete digital control. The AD5290 also provides superior temperaturecoefficient performance and solid-state reliability. AD5251/AD5252/AD5253/AD5254: Nonvolatile Dual- and Quad-Channel I2C-Compatible Digital Potentiometers The AD525x family of dual and quad 6- and 8-bit resolution digital potentiometers is ideal for I2C-controlled applications in
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