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Posts Tagged ‘digital potentiometers’

App note: Programmable analog functions

Sunday, July 14th, 2019

Another app note from ON Semiconductors about various digital potentiometers application. Link here (PDF) Analog circuits are made programmable by using digital potentiometers (POTs) to vary the key circuit parameters. This application note provides the analog design engineer with basic reference designs and circuit ideas for controlling the key parameters...

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App note: Digital potentiometer (POT) to control LED brightness

Sunday, July 14th, 2019

Controlling LED brightness through digital potentiometer and a LED driver from ON Semiconductor. Link here (PDF) Light-emitting diodes (LEDs) require a regulated current, and their brightness is proportional to the current that flows through them. Some LED drivers use an external resistor to set the LED current. A digital POT...

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App note: Replacing mechanical potentiometers with digital potentiometers

Sunday, August 12th, 2018

Another application note from Analog Devices this time about the superiority of digital over mechanical potentionmenters. Link here (PDF) Potentiometers have been widely used since the early days of electronic circuits, providing a simple way to calibrate a system, adjusting offset voltage or gain in an amplifier, tuning filters, controlling...

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App note: Minimizing the temperature dependence of digital potentiometers

Sunday, August 27th, 2017

Application notes from NIDEC COPAL Electronics Corp. about digital potentiometer's temperature dependence. Link here (PDF) The digital potentiometers (DP) has two temperature dependent parameters, the TC of the end-to-end resistance Rpot and the ratiometric TC. The temperature dependence of the parameters of an analog circuit using a digital potentiometers is...

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App note: Resolution enhancements of digital potentiometers with multiple devices

Sunday, March 19th, 2017

An old application note from Analog Devices about configuring multiple digital potentiometers to improve resolution, accuracy and programming complexity might add-up to the mix though. Link here (PDF) Digital potentiometers usually come with standard resistance values of 10k, 100k, and 1MW at a given number of adjustable steps. If an...

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App note: Minimizing the temperature dependence of digital potentiometers (POTs)

Sunday, November 30th, 2014

An app note from ON Semiconductors. The digital POT has two temperature dependent parameters, the TC of the end-to-end resistance RPOT and the ratiometric TC. The temperature dependence of the parameters of an analog circuit using a digital POT is reduced if the performance of the circuit is shifted from...

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app note: Digital Potentiometers: Frequently Asked Questions

Sunday, June 1st, 2014

FAQ on Analog Device's digital Potentiometers. App note here. A digiPOT is a digitally controlled resistor that changes the impedance between the terminals and wiper depending on the code loaded in the RDAC register. Digital potentiometers avoid the problems that mechanical potentiometers face, such as physical size and wear and...

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