Categories

App note: Replacing mechanical potentiometers with digital potentiometers

Posted on Sunday, August 12th, 2018 in app notes by DP

an_analog_AN1121

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 screen brightness, among other uses. Due to their physical construction, mechanical potentiometers have some limitations inherent to their nature, such as size, mechanical wear, wiper contamination, resistance drift, sensitivity to vibration, humidity, and layout inflexibility.

Digital potentiometers are designed to overcome all these problems, offering increased reliability and higher accuracy with smaller voltages glitches. The mechanical potentiometer has now been relegated to environments where the digital potentiometer cannot be a suitable replacement, such as high temperature environments or in high power applications.

Comparing both technologies is the simplest way to discern which is the optimal solution for your system.

This entry was posted on Sunday, August 12th, 2018 at 5:00 pm and is filed under app notes. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

Leave a Reply

Notify me of followup comments via e-mail. You can also subscribe without commenting.

Recent Comments

  • Crawford: Biscuits!
  • hli: Sunday++
  • Jack: Hello! Any board relating to LC filter circuits?
  • Fabien: PCB is life, life is PCB.
  • Kurt: We sleep safely at night because rough men stand ready to visit violence on those who would harm us. (Rough women, too.)