ADC Vref stability

[johnerrington]

Since we dont know what is connected INSIDE the chip those connections arent very meaningful

@tdavid

the Vref measured on the external pin

How are you measuring that?

Can you provide your code for the ADC measurement program, and a schematic of eveything you have connected to the Portenta - including how it is powered?

How to make a schematic you can post.

When you submit a question on the forum you will usually need to add a schematic (circuit diagram). The tutorial that follows will explain some ways to create a useful image; however lets start by explaining how to add the image to your post. Its easy. Having created the image all you need to do is : Save the image somewhere convenient - maybe your desktop Start your post, and place the cursor (insertion point) where you want the image to be shown; [upload image to forum] 3: click th…

Corrected link from post 2

https://www.st.com/resource/en/application_note/an5354-getting-started-with-the-stm32h7-series-mcu-16bit-adc-stmicroelectronics.pdf