How to read analog input data from soil moisture sensor using AML-S905X-CC ADC PINS

Cool. I used it now with two resitors of 220 OHM to get 1.65V from 3.3V Vin can you explain me the numbers I’m getting from the ADC pin? I didn’t find it’s specification… is it 10bits? what is the minimum and maximum I can get…?
Now the values is about 3700 when the sensor dry and 2400 when it totally wet (covered by water). Is it make sense? I want to be ensure I won’t damage my libre le potato and sensor…