2021-04-06 05:03 AM
I am trying to configure STM32H742 to convert 3 different input channels (3, 5, 16) in an ADC (1) .
I have achieved to convert just one channel with a sampling frequency of 1MHz, seeing that 1 million samples are converted per second. But when I add new inputs to convert I can not see that the converted sampled are scaling correctly. I am wondering that it may be an ADC limitation for the sampling frequencies.
So which is the maximum sampling frequency of the ADC 1? I can not find it on the reference manual.
Thank you all.
Solved! Go to Solution.
2021-04-06 05:57 AM
Hello @EEtxe.1 ,
I recommend you to have a look to Application Note AN5354 "Getting started with the STM32H7 Series MCU 16-bit ADC".
Imen
2021-04-06 05:57 AM
Hello @EEtxe.1 ,
I recommend you to have a look to Application Note AN5354 "Getting started with the STM32H7 Series MCU 16-bit ADC".
Imen
2021-04-07 04:53 AM
Hello @Imen GH , first of all thank you for your answer, it was very helpful.
But I have a new doubt now that I am having a look to the Application Note and the Reference Manual. Are the 6 fast channels preconfigured by default as fast or I need to configure them as fast? If I have to configure them how can I do it or where can I have a look at how is it done?
Reference manual says:
Up to 20 analog input channels (x = ADC number= 1 to 3):
– ADCx_INP[0:5] fast channels
– ADCx_INP[6:19] slow channels
But I use package LQFP100, and the Application Note says that there are 3 fast channels.
Thank you.