Different ADC's VREF

[JTánt.1]

Hi all,

I am working with the ADC of the STM32G484 microcontroller, and I would need to have two different reference voltages, in order to gain resolution.

I can't find anything about this in the datasheet, so it leads me to think that it is not possible.

Do they have experience in something like that?

Thank you very much, regards.

[TDK]

Nope. Single VREF for all ADCs. VREF has a pretty limited range of allowable values anyway, 1.62V at the absolute minimum, but that has requirements on the power supply setup.

The reference manual generally has more details about the capabilities of the chip than the datasheet.