AD5251/AD5252 is a digital potentiometer produced by Analog Devices. It has 64-bit/256-bit resolution and can be selected in four resistance ranges of 1kΩ, 10kΩ, 50kΩ and 100kΩ. It has a non-volatile memory that stores potentiometer settings. It supports I2C interface and can read and write potentiometer through I2C interface.