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Digital potentiometers (digipots) are used to trim and scale analog signals. They provide an output resistance that is variable based on digital inputs and so are sometimes referred to as resistive digital-to-analog converters (RDACs).

Digipots are typically available with linear or logarithmic tap points. In addition, Maxim offers some further variations of the basic digipot. Nonvolatile digipots retain their last programmed wiper position when the power supply is switched off. OTP digpots set the wiper's power-on reset (POR) position to a user-defined value.

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Featured Products

MAX5440 Stereo Volume Control with Rotary Encoder Interface

MAX5440 Stereo Volume Control with Rotary Encoder Interface

The MAX5440 dual, 40kΩ logarithmic taper volume control features a debounced up/down interface for use with a simple rotary encoder without using a microcontroller (µC). Each potentiometer has 32 log-...
MAX5128 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package

MAX5128 128-Tap, Nonvolatile, Linear-Taper Digital Potentiometer in 2mm x 2mm µDFN Package

The MAX5128 nonvolatile, single, linear-taper, digital potentiometer performs the function of a mechanical potentiometer, but replaces the mechanics with a simple 2-wire digital interface. The MAX5128...
MAX5481 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers

MAX5481 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers

The MAX5481–MAX5484 10-bit (1024-tap) nonvolatile, linear-taper, programmable voltage-dividers and variable resistors perform the function of a mechanical potentiometer, but replace the mechanics with...
MAX5394 Single, 256-Tap Volatile, SPI, Low-Voltage Linear Taper Digital Potentiometer

MAX5394 Single, 256-Tap Volatile, SPI, Low-Voltage Linear Taper Digital Potentiometer

The MAX5394 single, 256-tap volatile, low-voltage linear taper digital potentiometer offers three end-to-end resistance values of 10kΩ, 50kΩ, and 100kΩ. Potentiometer terminals are independent of supp...
MAX5389 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer

MAX5389 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer

The MAX5389 dual, 256-tap, volatile, low-voltage linear taper digital potentiometer offers three end-to-end resistance values of 10kΩ, 50kΩ, and 100kΩ. Operating from a single +2.6V to +5.5V power sup...
MAX5395 Single, 256-Tap Volatile, I<sup>2</sup>C, Low-Voltage Linear Taper Digital Potentiometer

MAX5395 Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer

The MAX5395 single, 256-tap volatile, low-voltage linear taper digital potentiometer offers three end-to-end resistance values of 10kΩ, 50kΩ, and 100kΩ. Potentiometer terminals are independent of supp...
MAX5388 Dual, 256-Tap, Volatile Low-Voltage Linear Taper Digital Potentiometers

MAX5388 Dual, 256-Tap, Volatile Low-Voltage Linear Taper Digital Potentiometers

The MAX5386/MAX5388 dual, 256-tap, volatile, low- voltage linear taper digital potentiometers offer three end-to-end resistance values of 10kΩ, 50kΩ, and 100kΩ. Operating from a single +2.6V to +5.5V ...
MAX5386 Dual, 256-Tap, Volatile Low-Voltage Linear Taper Digital Potentiometers

MAX5386 Dual, 256-Tap, Volatile Low-Voltage Linear Taper Digital Potentiometers

The MAX5386/MAX5388 dual, 256-tap, volatile, low- voltage linear taper digital potentiometers offer three end-to-end resistance values of 10kΩ, 50kΩ, and 100kΩ. Operating from a single +2.6V to +5.5V ...
MAX5387 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer

MAX5387 Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer

The MAX5387 dual, 256-tap, volatile, low-voltage linear taper digital potentiometer offers three end-to-end resistance values of 10kΩ, 50kΩ, and 100kΩ. Operating from a single +2.6V to +5.5V power sup...
MAX5393 Dual 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometers

MAX5393 Dual 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometers

The MAX5391/MAX5393 dual 256-tap, volatile, low-voltage linear taper digital potentiometers offer three end-to-end resistance values of 10kΩ, 50kΩ, and 100kΩ. Operating from a single +1.7V to +5.5V po...
MAX5391 Dual 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometers

MAX5391 Dual 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometers

The MAX5391/MAX5393 dual 256-tap, volatile, low-voltage linear taper digital potentiometers offer three end-to-end resistance values of 10kΩ, 50kΩ, and 100kΩ. Operating from a single +1.7V to +5.5V po...
DS1809 Dallastat

DS1809 Dallastat

The DS1809 Dallastat is a single, 64-position digital potentiometer which provides both a simple contact closure-controlled interface and a microprocessor-controlled interface. Wiper position is maint...
DS1267B Dual Digital Potentiometer

DS1267B Dual Digital Potentiometer

The DS1267B has two 256-position potentiometers, with wiper positions each set by stored 8-bit values. The DS1267B communicates through a 3-wire serial port interface that drives an internal control l...
DS1868B 2-Channel Digital Potentiometer

DS1868B 2-Channel Digital Potentiometer

The DS1868B has two 256-position potentiometers, with wiper positions each set as 8-bit values. The potentiometers can be used independently or stacked for increased total resistance and number of tap...

MAX5395LEVKIT Evaluation Kit for the MAX5395L, MAX5395M, and MAX5395N

The MAX5395L evaluation kit (EV kit) demonstrates the MAX5395L single, 256-tap volatile, low-voltage linear digital potentiometer. The device comes in an 8-pin TDFN-EP package. The EV kit provides con...

MAX5394MEVKIT Evaluation Kit for the MAX5394L, MAX5394M, and MAX5394N

The MAX5394M evaluation kit (EV kit) demonstrates the MAX5394M single, 256-tap volatile, low-voltage linear digital potentiometer. The device comes in an 8-pin TDFN-EP package. The EV kit provides con...
DS1855 Dual Nonvolatile Digital Potentiometer and Secure Memory

DS1855 Dual Nonvolatile Digital Potentiometer and Secure Memory

The DS1855 dual nonvolatile (NV) digital potentiometer and secure memory consists of one 100-position linear taper potentiometer, one 256-position linear taper potentiometer, 256 bytes of EEPROM memor...
MAX5456 Stereo Audio Taper Potentiometers with Pushbutton Interface

MAX5456 Stereo Audio Taper Potentiometers with Pushbutton Interface

The MAX5456/MAX5457 dual, logarithmic taper digital potentiometers feature a simple pushbutton interface that controls volume and balance in audio applications. Each potentiometer has 32 tap points an...
MAX5457 Stereo Audio Taper Potentiometers with Pushbutton Interface

MAX5457 Stereo Audio Taper Potentiometers with Pushbutton Interface

The MAX5456/MAX5457 dual, logarithmic taper digital potentiometers feature a simple pushbutton interface that controls volume and balance in audio applications. Each potentiometer has 32 tap points an...
MAX5487PMB1 MAX5487PMB1 Peripheral Module

MAX5487PMB1 MAX5487PMB1 Peripheral Module

The MAX5487PMB1 peripheral module provides the necessary hardware to interface the MAX5487 dual linear-taper digital potentiometer to any system that utilizes Pmod™-compatible expansion ports configur...

Reference Designs

Carmel (MAXREFDES18#): High Accuracy Analog Current/Voltage Output

The Carmel (MAXREFDES18#) subsystem reference design is an isolated, high-accuracy analog curren...

3V DACs Used in ±10V Applications

This application note discribes using a 3V DAC, then level shifting and amplifying the output to...