EEVblog Electronics Community Forum

General => General Technical Chat => Topic started by: implor on February 16, 2020, 01:26:02 pm

Title: When is an differentialen ADC worth it?
Post by: implor on February 16, 2020, 01:26:02 pm

What is your decision process?

Assuming you have an single ended source and ADC is on same PCB.

Say that requires resolution is 0.1% and Vref is 1.2V.

Is it worth the extra cost?

Title: Re: When is an differentialen ADC worth it?
Post by: SiliconWizard on February 16, 2020, 02:07:09 pm

Agreed. Note that many high-res ADCs will have differential inputs anyway (usually starting with 16-bit, and even more common at 24-bit) to meet their rated specs. So you don't necessarily have a choice. You may of course still drive them single-ended, but with extra care and as blueskull said, never without proper additional filtering and a pretty limited bandwidth.