Hi Team Good Evening, I am using STM32H7A3 series Microcontroller for our project. How to set the sampling cycle for Direct, Fast and Slow channel? As per datasheet, Slow channel ADC Max Freq is 10MHz. Is Slow channel ADC works more than 10MHz?

[Muhammed Güler]

https://www.st.com/resource/en/application_note/an2834-how-to-get-the-best-adc-accuracy-in-stm32-microcontrollers-stmicroelectronics.pdf

If you review this document, you can find the answer to your question and more.

[HChan.7]

Hi,

I already studied this application note. But they said to refer the datasheet for Direct, Fast and Channel Configuration. Based on the STM32H7A3 datasheet, I got the maximum speed for Slow channel is 10MHz.

Based on above link application note, they calculated minimum sampling time for STM32H7 series based on some hardware configuration. Please find the below picture (in document page no 33).

Could you please help me for this calculation? How they calculated this minimum sampling time for each bit resolution with LSB?

and

I got one formula to find time constant tc = (RADC+RAIN) × CADC.

What is the value for RADC for STM32H7 series? (This value is not mentioned in datasheet also)