STM32F722 ADC

[Loca_Boi]

Hello everyone, I'm trying to read four analog signals on my STM32F722RET7 using ADC1 with four consecutive channels and outputting the results over UART.

Even though the input voltages remain constant, the ADC readings fluctuate without any change in the input signal. Can you please suggest a solution for this?

[Uwe Bonnes]

Quantify the fluctuation? Some small fluctuation is normal, high fluctuation points to errors n your setup, e.g. high input impedance, too small sampling times, instable VREF, EMC etc.

 

[TDK]

How to optimize the ADC accuracy in the STM32 MCUs - Application note