Dealing with opamp/voltage divider when used with ADCs

[gabbla]

Hello all,

I'm working on a STM32H5 based board, which is equipped with an NTC. The NTC is used in conjunction with a non-inverting opamp with a gain of 2. The opamp output is then connected to one of the ADCs. Such ADC does not supports any gain but ADC_GAIN_1 (and I don't really understand why), so I can't configure a channel to be chopped in half (to remove the 2x gain of the opamp).
Now, I'd like to use the ntc-thermistor-generic, but it's obviously not working as expected due to the signal being conditioned.
How should we handle situations like this one?

Thank you,
Gab