Questions about ADuM 3440 Propagation Delay

Hi, I have three questions about ADuM 3440 Propagation Delay.

 

  1. What exactly meaning of tPSK? It is said in the datasheet that “tPSK is the magnitude of the worst-case difference in tPHL or tPLH that is measured between units at the same operating temperature, supply voltages, and output load within the recommended operating condition”, but what the “units” refer to? Different ADuM 3440, or different channels?

 

  1. IS tPSKCD the propagation delays between any two channels of a given ADuM 3440?

 

  1. Will tPSK and tPSKCD change after ADuM 3440 power up?

 

Thanks,

Jiulu

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  • 0
    •  Analog Employees 
    on Jan 9, 2017 11:38 PM

    Hi Jiulu,

    1. The "units" means different channels of different ADuM3440( eg: between ch1 of one ADuM3440 and ch2 of the other)

    2. Yes, tPSKCD is the propagation delay between any two channels of a given ADuM3440.

    3. tPSK and tPSKCD are tested when ADuM3440 is powered up, the specs are guaranteed under test environment such as "TA = 25C, VDD1 = VDD2 = 5 V"

    We recommend you to use ADuM140E instead of ADuM3440 for your new design. ADuM140E has better perfomance than ADuM3440 such as wider supply voltage range / higher CMTI / lower prop delay / higher operating temp.

    Regards,

    Neil

Reply
  • 0
    •  Analog Employees 
    on Jan 9, 2017 11:38 PM

    Hi Jiulu,

    1. The "units" means different channels of different ADuM3440( eg: between ch1 of one ADuM3440 and ch2 of the other)

    2. Yes, tPSKCD is the propagation delay between any two channels of a given ADuM3440.

    3. tPSK and tPSKCD are tested when ADuM3440 is powered up, the specs are guaranteed under test environment such as "TA = 25C, VDD1 = VDD2 = 5 V"

    We recommend you to use ADuM140E instead of ADuM3440 for your new design. ADuM140E has better perfomance than ADuM3440 such as wider supply voltage range / higher CMTI / lower prop delay / higher operating temp.

    Regards,

    Neil

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