ADAU1466 - ASRC - is digital filtering involved?

Hi, I just wanted to know if using the ASRCs involves digital filtering as it is done like in an AD1896?

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  • Any form of sample rate conversion, whether synchronous or asynchronous, inherently involves digital filtering, specifically a low-pass (typically linear-phase FIR) filter to prevent aliasing. This is mandatory to ensure that, as long as the input signal of the sample rate conversion has negligible energy outside the passband of the filter, the output of the sample rate conversion represents the same signal.

    This filtering is similar to the low-pass filtering (typically both digital and analog) done as part of A/D and D/A conversion, and indeed a sample rate converter can be viewed as an optimized simulation of a DAC (running at input sample rate) followed by an ADC (running at output sample rate), with the output filter of the DAC and the input filter of the ADC combined into one.

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  • Any form of sample rate conversion, whether synchronous or asynchronous, inherently involves digital filtering, specifically a low-pass (typically linear-phase FIR) filter to prevent aliasing. This is mandatory to ensure that, as long as the input signal of the sample rate conversion has negligible energy outside the passband of the filter, the output of the sample rate conversion represents the same signal.

    This filtering is similar to the low-pass filtering (typically both digital and analog) done as part of A/D and D/A conversion, and indeed a sample rate converter can be viewed as an optimized simulation of a DAC (running at input sample rate) followed by an ADC (running at output sample rate), with the output filter of the DAC and the input filter of the ADC combined into one.

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