Question
Is there a difference between volatile and non-volatile Digipots?
Answer
ADI’s wide portfolio supports four different options of integrated memory, allowing the user the flexibility to select the ideal digiPOT for the endapplication. Internal memory allows the user to set the wiper’s power-on reset (POR) position to a user programmed value. The wiper position can bereprogrammed multiple times but always returns to the programmed position on power-up. This function is ideal for calibration or for applicationsthat require a fast power-on time.• Volatile memory only: digiPOT typically powers up to midscale.• One-time programmable (OTP): allows user to program the wiper power-up position once—ideal for factory calibration.• Multitime programmable (MTP): ADI has product offerings that support 2×, 20×, or 50× programmable wiper memory.• EEPROM: ADI’s integrated EEPROM offers endurance up to 1M programming cycles and data retention of 50 years at 125°C.