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What is a digital potentiometer?
A digital potentiometer is a variable resistor that can be used as a voltage divider. It adjusts and trims electronic circuits similar to variable resistors, rheostats and mechanical potentiometers. Also called digital POT, RDAC, or digipot, these compact devices can be used to calibrate system tolerances or dynamically control system parameters.
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2002-11-13 Using multiple DS1267 Digital Potentiometers with an 8051 microprocessor generating 3-wire signals
This application note provides an overview of different configurations for communicating to multiple DS1267s with a common bus.
2001-04-09 Using multiple DS1267 digital potentiometers with an 8051 microprocessor generating 3-wire signals
This application note provides an overview of different configurations for communicating to multiple DS1267 digital potentiometers with a common bus. It also provides the hardware and software required for communicating to two DS1267s daisy-chained together in series.
2004-05-25 Using digital potentiometers to design low-pass adjustable filters
This app note presents a programmable, second-order, low-pass filter in four different scenarios.
2003-06-28 Using Digital Potentiometers in Adjustable Step-Down DC-DC Converter Design.
This application note describes how to use a digital ptoentimeter to generate an adjustable voltage supply a MAX1776 Step-Down DC-DC Converter
2010-08-24 Using digital potentiometers for programmable amplifier gain
This application note discusses implementations of programmable gain circuits using an op amp and a digital potentiometer
2007-10-24 SPI interface characterizes digital potentiometers
The latest non-volatile digital potentiometers from Microchip Technology Inc. feature SPI interface.
2003-09-19 Resolution enhancements of Digital Potentiometers with Multiple Devices
This application note explains how digital potentiometers can be configured to optimize the resolution of a given application.
2003-10-03 Programmable Oscillator Uses Digital Potentiometers
This application note describes the design of an oscillator where setting the resistance of the digital potentiometers programs the oscillation frequency and amplitude independently.
2009-03-18 Pots, pans, logs and linear digital pots create arbitrary voltage curves
Linear digital potentiometers can be used to make arbitrary voltage curves and waveforms. An alternative name for a digital pot is a "string" DAC. Logging pots is the art of making a linear pot produce a logarithmic response for applications such as audio.
2005-08-05 New digital pots from Maxim housed in 3-by-3mm TQFN
The new MAX5481-MAX5484 devices from Maxim Integrated Products are touted to be the industry's first pin-selectable up/down or SPI-compatible, 1024-tap nonvolatile digital potentiometers packaged in a 3-by-3mm, 16-pin TQFN
2005-04-05 Maxim's digital pots with EEPROM
Maxim unveiled what it claims as the industry's smallest 256-step, dual, nonvolatile digital potentiometers with on-chip EEPROM and packaged in a 3-by-3mm TQFN.
2005-08-18 Maxim unveils new digital pots
The MAX5481-MAX5484 devices from Maxim Integrated Products are touted to be the industry's first pin-selectable up/down or SPI-compatible, 1024-tap nonvolatile digital potentiometers packaged in a 3-by-3mm, 16-pin TQFN
2004-10-29 Maxim unveils 'smallest I?C, 32-tap nonvolatile digital pots
Maxim disclosed that they have developed the industry's smallest I?C, 32-tap, nonvolatile digital potentiometers.
2003-11-26 Maxim digital pots have on-chip EEPROM
Maxim Integrated Products has introduced what it claims is the industry's first family of 32-tap, non-volatile digital potentiometers with on-chip EEPROM.
2001-04-11 LCD contrast control using Dallas Semiconductor digital potentiometers
This application note describes how to use the DS1668/DS1669 digital potentiometers as drop-in replacements for the standard mechanical potentiometer used in LCDs to control contrast.
2004-11-23 How to increase the bandwidth of digital potentiometers 10x to 100x
This app note presents a simple circuit technique to increase the bandwidth of digital potentiometers by a factor of 10 to 100 times.
2007-09-27 How to construct a pushbutton controller for the DS1803/DS1805 digital potentiometers
This application note describes a simple method that uses pushbuttons and a microcontroller to change the resistance of a DS1803 or DS1805 digital potentiometer
2009-05-11 How to calculate the wiper voltage of a digital potentiometer
This application note explains the issues involved in the calculation of the wiper voltage of a digital potentiometer, breaking the process into smaller steps
2005-12-22 Digital pots with push-button interface
Maxim Integrated Products' new dual, 32-tap, audio-taper digital potentiometers feature a debounced, simple push-button interface for volume and balance control.
2006-12-21 Digital pots offer alternative to DACs
Catalyst's five new digital programmable potentiometers offer low-noise, stable and reliable alternatives to DACs and mechanical potentiometers.
2003-08-21 Digital pots cut non-volatile memory price
Analog Devices' AD517x family features compact "set & forget" digital potentiometers that features automatic resistance lock.
2002-04-16 Digital potentiometers enhance volume controls
This technical news feature discusses some the advantages and disadvantages of implementing digital potentiometers to shrink volume control size in audio systems.
2006-03-07 Digital potentiometers consume 0.3A
Microchip Technology announced a family of low-power, low-voltage, 6bit digital potentiometers that are said to be cost and size competitive with mechanical versions.
2005-06-09 Digital potentiometers are priced like mechanical counterparts
The new family of digitally-controlled potentiometers from Microchip Technology are said to be cost and size competitive with current mechanical potentiometer devices
2008-03-13 Digital pot with EEPROM runs record write cycles
A dual 8bit digital potentiometer with high-performance EEPROM and data retention and write cycles has been launched by austriamicrosystems for communications, industrial, medical and automotive applications
2007-06-11 DC/DC module trim with digital potentiometers
This application note describes the trimming technique for DC/DC converter modules using industry standards for output voltage trim.
2002-08-29 Dallas IC integrates three digital potentiometer
The DS3903 digital potentiometer IC contains three nonvolatile, low-temperature coefficient digital potentiometers that can be accessed through a 2-wire bus.
2007-08-15 DACs vs. digital potentiometers: Which is right for my application?
Designers and procurement engineers whose applications require a finely tuned analog output controlled by a digital input have two options: digital potentiometers and DACs.
2002-02-07 Catalyst Semiconductor digital potentiometer offers 1 percent resolution
The CAT5111 and CAT5113 digital potentiometers are designed to replace mechanical potentiometers and trimmers in systems requiring automated or self-calibration.
2003-01-15 Catalyst digital pots store data for 100 years
The quad CAT5401 and dual CAT5411 64-tap, non-volatile digital pots are able to retain data for up to 100 years
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