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AD4680: Is tQUIET always necessary for all the Fsclk?

Hi All,

I have two questions about AD4680.

1)  Is the tQUITE in Figure 2 always necessary over the entire SCLK frequency range? 

    I understand we need a tQUITE time when using 40MHz SCLK to make sure 1Msps throughput, is tQUITE(500ns)  still required for 10MHz SCLK operation?

2)  In Figure 3, It seems that tCONVERT and tACQUIRE overlap, is it true?

     If yes, The AD4680 starts the next sampling while it is still in conversion operation, could you tell me why it can be achieved?

Warm Regards,