My adc is measuring -3,3 to 3,3 that 16 bit but I wanna build it as 0 3,3 V how can I configure it in this form?

[Tesla DeLorean · Accepted solution]

None of the STM32 support ADC of +/- 3.3V

Perhaps you be more specific, and detail how this is relevant to the forum

[situ.1]

STM32H743 I have connected PC with usb cable supplyin power from it.

When I apply 0 V I read 32768 approx.

Then I appiled -3.3 volt the it comes 0 Volt.

I wanna use it as 0 3.3 V and 16 bit please help!

[LauraCx]

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[Tesla DeLorean]

What board is this? A custom one? Share a circuit diagram, illustrate what you're trying to do.

The IC is not designed to take -3.3V on any of the input pins

I'd imagine doing so would probably cause damage to the IC or the pin in question.

[situ.1]

STM32H743ZIT6 . I am trying to measure 0 3.3 V from ADC and make it as 16 bit.

When I connect jumpers to pins that shows in photo and When I apply 0 V I read 32768 approx...

I wanna get this measurement between 0 and 3.3 Volt. Thankss

[situ.1]

And when I connect this pins -3.3 Volt I got 0 Value as digital thats proof of it works -3.3 +3.3 for 16 bits

[Tesla DeLorean]

STM32H743ZIT6 is a CHIP, not a BOARD

What BOARD is this on, and what's the CIRCUIT?

Why are you connecting -3.3V, this is way outside the absolute maximums? Damagingly

so.

Make sure you have a common ground between the STM32 and whatever else you're connecting too.

Make sure VSSA is this same Ground, and VDDA is 3.3V

DON'T go above/below this limits