Hi everyoneI want to measure a small voltage of 10mv-50mv of a sine wave.Can i use Internal adc of nucleo board ? what is the lowest voltage i can measure using internal adc.

Associate III

Solved

Nucleo-446re internal adc

Hi everyone

I want to measure a small voltage of 10mv-50mv of a sine wave.
Can i use Internal adc of nucleo board ? what is the lowest voltage i can measure using internal adc.

Best answer by PGump.1

Hi,

You will get scaled down values. Only you can decide if they are any good for your application...

The math behind ADC isn't difficult, start there.

To get the maximum out of an ADC, you need to get a solid understanding of Sampling Theorem...

Kind regards
Pedro

Senior II

Hi,

Is 10mV-50mV peak-to-peak, peak, average, RMS?

What resolution (how many bits) do you need?

Kind regards
Pedro

AI = Artificial Intelligence, NI = No Intelligence, RI = Real Intelligence.

Associate III

Thank you

Senior II

Hi,

You'll have to lower your expectations. If you can get the +REF down to 1.7V, you may get 5-6 bits...

I hope that helps.

Kind regards
Pedro

AI = Artificial Intelligence, NI = No Intelligence, RI = Real Intelligence.