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pcm4220 bandwidth : 0.4885*FS, not 0.4535*FS



Dear all,
we are running the PCM4220 at FS=100kHz, classic response. A linear frequency sweep is injected in the analog inputs, the data are read and the FFT clearly shows that the -3dB frequency cutoff is at 48.85 kHz and not at 45.35 kHz as expected according to the datasheet.
Is there a good reason for that ?
thanks in advance
sébastien