Teensy4 - ADC & AREF

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dparker

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Paul, thank you for continuing to evolve this amazing platform.

I've been working on a Teensy3.2 based project using onboard ADC with a 2.5v AREF. I would love to step the project up to a Teensy4, but didn't spot an AREF pin on the pin diagram. Is the Teensy4 using an internal AREF? If so, is the range adjustable or is it locked?

Thanks!
 
After checking the datasheet and running a couple of tests, it looks like AREF == Vdda (3.3v)
Adjusting my circuit to support [0 - 3.3v] instead of [0 - 2.5v] is easy enough, so I'm going that route.
 
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