ADC grounding recommendations

Have been thinking about ADCs and doing a layout, which always brings me back to one of my favorite articles on the web about layout, thought I’d share it here. Also with resources like this, I do normally recommend you download and save them somewhere like a dropbox. This is knowledge that never goes out of style :slight_smile:

http://www.analog.com/en/analog-dialogue/articles/staying-well-grounded.html

PDF version:

I also had the privilege of chatting with Hank Z on The Amp Hour a couple years ago, he’s a great engineer and was a joy to talk to:

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Generally, use a single ground plane, and partition your layout to keep the analog and digital stuff separate.

Remember that the return current for a signal follows the path of least inductance. This means that the return current for a digital trace will be in the plane directly below (or above) it.

Thanks Chris,

Those are very helpful links. Of all of electronics, I find signal integrity stuff the hardest; it always seems to be shrouded in a veil of mystery, especially with book titles like: “High-speed digital design - a handbook of black magic”.

/Niels.