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26th June 2019, 23:20 #1
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when calculating the SNR of adc，should the bandwidth of noise be 1/2fsample？
when calculating the SNR of adc，if i want to calculate all the noise，should the bandwidth of noise be 1/2fsample？in the book，its said that the quantization noise of adc is distributed in the range from zero to 1/2fsample.and i have another question.when calculating the noise of a sigma delta adc from the output of its digital filter，should the integration bandwidth of noise be set to 0 to 1/2 of the clock frequency of the output digital code？

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27th June 2019, 01:11 #2

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27th June 2019, 06:05 #3
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Re: when calculating the SNR of adc，should the bandwidth of noise be 1/2fsample？
Hi,
many audio ADCs work with higher sampling rate, then they use digital filters, then they reduce the data rate.....
Thus 1/2 f more relates to the output data rate than to the true sampling rate.
> I'd choose the bandwidth to the "typical bandwidth of interest of the ADC".
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