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ADC08D1520: Swapped DI and DId, DQ and DQd in 1:4 DEMUX DES MODE when they adjusted the sampling clock phase with the registers (coarse phase adjust and intermediate phase adjust)

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Part Number:ADC08D1520

Hello,

My customer has a question about ADC08D1520.

[Background]

They evaluated the output waveform of the ADC08D1520 while changing the sampling clock phase with the registers (Addr=Fh) in their board.

Input signal is CW.

The configuration is 1:4 DEMUX DES MODE.

They changed the phase from 0ps to 142ps with course phase adjust and intermediate phase adjust.

It swapped DI and DId, DQ and DQd in that test.

[Q1]

Is there a possibility that the swapping DI and DId, DQ and DQd occurs by changing the phase adjust ?

[Q2]

Does the DCLK phase change by changing the phase adjust ?

Best Regards,

Hiroshi Katsunaga


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