I made some tests yesterday with Analog inputs and had some strange results regarding to the VREF input of the Cortex, that is not supplied on the G120, and that would be useful for analog sampling stability.
In effect, when providing a stable Voltage in input of an anlog channel, I can see that the ReadRaw value can make a gap from 20 to 80 around the value between 2 measurments (0 to 4096 at 12 bits resolution…).
At VCC 3V, it means a fluctuation of about 2% or even 60 mV…
Can you confirm that the VREF stability can increase the stability of analog sampling, and thus, do you plan to add such an LM4040-N in a future realease of the G120, instead of simply making it common to the VCC Source ?
Thanks for your feedback !