Issue with nucleo L476RG and ADC and DMA with a 500KHz signal

Seth1er · ‎2022-06-27

Hello,

I try to use a nucleo to acquire a signal at 500KHz but I can't.

I already use this code to acquire a 30KHz signal with DMA a 1MHz sampling and it's OK.

now I try to with a wampling at 1MHZ, 10MHz, the acquire signal isn't the good one. Value fluctuating between min and max

If someone can help me, I don't understand why it doesn't work.

KDJEM.1 · ‎2022-07-06

Hi @Seth1er ,

I advise you to follow this Datasheet (DS10198) Table 76.

In this table, you can show that the different ADC characteristics. So, to resolve the problem, try to verify this ADC parameters.

More details on sampling time are available in this Application Note (AN2834).

Kaouthar

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