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Thread: Teensy4 - ADC & AREF

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  1. #1
    Junior Member
    Join Date
    Dec 2018
    Posts
    10

    Teensy4 - ADC & AREF

    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!

  2. #2
    Junior Member
    Join Date
    Dec 2018
    Posts
    10
    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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