AD512x & AD514x Nonvolatile DigiPOTs Analog Devices Inc. AD512x and AD514x Nonvolatile Digital Potentiometers provide a nonvolatile solution for 128-/256-position adjustment applications, offering guaranteed low resistor tolerance errors of ±8% and up to ±6mA current density in the A, B, and W pins. The low resistor tolerance and low nominal temperature coefficient of these ADI devices simplify open-loop applications and applications requiring tolerance matching.