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Using a STM32H7 and internal ADC through DFSDM using sinc filter and aliasing protection

MGoth.2
Associate

‎2022-03-11 9:12 AM

Using a STM32H7 and internal ADC through DFSDM using sinc3 filter and would like aliasing protection.

The sinc filter has the notch at the new sample frequency. I would prefere to have the notch at half the new sampling frequency to get better aliasing protection. Would this be possible within the STM32H7 DFSDM filter structure and internal ADC.

Or is the only solution to go for external ADC?

By the way the sincFAST filter what is the difference compared to sinc1-filter?

/Mattias

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MGoth.2
Associate

‎2022-03-15 2:02 AM

Does it exist any good documentation of the sincFAST filter in the DFSDM?

What is the filter respsonse?

Is it possible to change order?

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