How to calculate ADC conversion time

Hello,

I did this calculation once before for my F5437A, perhaps they have the same FamilyUserGuides. You will find it in there for sure.

There are 2 critical timings , one for sample and hold:

It is important for the accuracy of your ADC value, the longer the sample and hold timing is the more accurate your digital value will be to the original analog value, of course there is a minimum recommended or needed sample and hold timing, which is calculated in a formula in the FamilyUserGuide.

And the other one is the actual conversion time, I think it is normally simply 13 clock cycles, and by clock the internal ADC clock is meant, not the one you are running your CPU with, for example external 25 MHz crystal. And in your Datasheet is stated a value for maximum ADC clock, which in my case for example was 5,4 MHz ( of course everything below is ok too).

So in your case I suppose you have to find out what your ADC clock is set to, which you did yourself in the ADC initialisation, and then read out the conversion time from your datasheet and voila :)

Seb