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LMK5B33414: Zero Delay Mode - variations

Piotr Nykiel
Prodigy 20 points
Part Number: LMK5B33414

In datasheet for LMK5B33414  we have parameter: Input-to-output propagation delay with ZDM enabled that value is:150 ps, and parameter: Input-to-output propagation delay variation with ZDM enabled that value is:+/65-ps.

How to understand second parameter? I understand like this: we have some constant delay 150ps and this delay flow over time in +/-65ps margins. Is this right? So this PLL is not determinitic.

  • +1
    TI__Expert 8630 points

    Hi Piotr, 

    Apologies for the delayed response here. The typical propagation delay when ZDM is enabled and DPLLx_PH_OFFSET = 172500 is around 150 ps. The +/- 65ps value is the maximum amount of variation in the propagation delay when ZDM is enabled, including variation over supply voltage and temperature.  ZDM still has a deterministic phase relationship between the input and outputs since it doesn't rely on the VCO post divider or channel output divider settings, and won't change over multiple power cycles of the device. Let me know if this answers your question. 

    Regards, 

    Connor