connect 5v to ADC_VREF

RP2040 based microcontroller boards running MicroPython.
Target audience: MicroPython users with an RP2040 boards.
This does not include conventional Linux-based Raspberry Pi boards.
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nayanagg
Posts: 11
Joined: Mon May 03, 2021 8:26 pm

connect 5v to ADC_VREF

Post by nayanagg » Tue Jun 08, 2021 6:38 am

Hi,

Can I connect 5V voltage reference to ADC_VREF of Pi Pico ?

fdufnews
Posts: 63
Joined: Mon Jul 25, 2016 11:31 am

Re: connect 5v to ADC_VREF

Post by fdufnews » Tue Jun 08, 2021 8:47 am

No!!!
No signal on any IO shall be higher than the power supply of the processor, so stay under 3.3V.
If you need to convert signals their voltage are higher than 3.3V you shall use a voltage divider on those signals to reduce their voltage span to the 0 - 3.3v range

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