1/f noise corner frequency

Question

Hi, 
 
 Could you please tell me what is the 1/f noise corner frequency of the ADC ? I couldn't find it in the data sheet. 
 
 BR, 
 Nicolas

ZoltanDTI · Accepted Answer

Hi Nicolas, 
 1/f noise has normal distribution too, so what you have found is not an indicator of the presence of 1/f noise. 
 I think the problem can be with the interpretation of the peak-to-peak value, although I do not know how you have determined it. 
 6 RMS means that on average 99,73% of the samples fall in this range. Taking your case, you have 524288 samples, so you can easily have more than 1400 samples outside the 6 RMS range and therefore have larger peak-to-peak value. Using a normal distribution calculator I&rsquo;ve found, that at 9.5 RMS you can still have typically 1 sample out of this range (due to statistics it can be more or less of course). This seems to fit your observation quite well. 
 I agree with that if you are interested in the frequency dependence of the noise, you should use spectral analysis (FFT) and the analog front end can affect the results. 
 I hope I could help. 
 Zoltan)

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1/f noise corner frequency