Hi,
Our customer are evaluating PCM1795 right now and they are measuring THD+N at DSD mode with 128 fs. The datasheet specifies it at only 64 fs, so they understand that it's not guaranteed at 128 fs. But they hope to have the THD+N data at DSD mode with 128 fs just for their reference. Because they measured at the condition but they have not gotten expected result as below.
1, THD+N = 0.03% at 0dB with 20k LPF
2, THD+N = 0.002% at -3dB with 20k LPF (Getting better compared with #1)
As stated above, they have not had good result at 0dB, so it will be appreciated if we can have your advice about it.
Best Regards,
Sonoki / Japan Disty