What parameter of the stm32 microcircuit determines the maximum signal frequency that the ADC can fix?

Question

Electronics

For example, there is stm32f103c8t6. If you use this controller as an ADC for one channel, then what restrictions will the input signal have for clamping?
If the signal is frequency modulated, then what is the maximum frequency that can be digitized:
-theoretically (without processing and transmission, for example, simply adding ciphered values ​​\u200b\u200bin RAM)
-practically (ADC + UART / usb / other interface)
Is it possible to work with sound on stm32f103c8t6 (how to determine the maximum available parameters: sample rate, depth)?
Is it possible to fix the inclusion of a microwave using stm32f103?
At what maximum frequency can you receive signals from the radio if you connect the radio part (analogue, without frequency multipliers) to the ADC?

Answer 1

Fox Jovovich said about Kotelnikov's theorem .

If the signal is frequency modulated, then what is the maximum frequency that can be digitized

For such a signal, a comparator (1 bit) is enough.

At what maximum frequency can you receive signals from the radio if you connect the radio part (analogue, without frequency multipliers) to the ADC?

If we are talking about F103 - very small (SDV / DV at best).

Answer 2

Google Kotelnikov's theorem. The point is not in the form of signal modulation, but in the ADC sampling rate, and everything is simple here - you can only capture a signal whose frequency is STRICTLY BELOW half of the ADC sampling rate.
For sound, the minimum sampling rate is 44100 (here 100 is just a margin), then only audio engineers will hear the error when switching between the source and the recorded signal on a professional audio system.
It makes no sense to take a frequency above 192 kHz for sound, even an audio engineer will not guess there.