Posted on September 04, 2016 at 10:02Hi,
I meet a problem with my project in which a STM32F373 MCU is used to collect singnal in single-ended mode.I short the pin with GND to test the board,the ADC values I get seems to fluctuate like saw-tooth.
![0690X00000603BzQAI.jpg 0690X00000603BzQAI.jpg](/t5/image/serverpage/image-id/46754i4CFACF3A89370118/image-size/large?v=v2&px=999)
The graph above shows what I get with my board.The signal is moving averaged.
But if I chang SDADC module into differential mode,the saw-tooth liked pattern disappears.
The single passes through a RC network before it arrives at the SDADC pin.
Has anyone encountered such a prolem?
Thanks