Article Q: What is the frequency response of the digital filter?

The output data point 1 is the average of samples 1-128, output data point 2 is the average of samples 129-256, and so on. The frequency response is a pure SINC1 with notches defined by the oversampling ratio. The software model on the web enables configuring the digital filter as well RC filter in front of the ADC and observe how that impacts: frequency response, step response, performance and so on.

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