I have a question from our customer about the decimation filter of AD9689.
> How does AD9689 round data in DDC and FIR (decimation filter) operations?
> Depending on the processing method, a DC component may be generated, but is this an operation that does not cause a DC component?
The decimal coefficient of the decimation filters are indicated in the datasheet and has a higher resolution than the ADC.
I think, depending on the waveform, this issue seems to change depending on whether the data is filtered after decimating or after filter processing.
Would you explain to me how do I understand about this issue?