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LMK03200: td0-delay condition

Ryuuichi machida
Guru 11790 points
Part Number: LMK03200

Hello,

I would like you to confirm conditon about spec of "td0-delay".

Q1, According to datasheet, "td0-delay" spec for CLKOUT5 and CLKOUT6 is defined max "300ps" and min "-300ps".
I believe that this spec consider temperature, but can not understand whether this depends on output frequency or not ?
Is this spec not related to frequency ?

Q2, According to datasheet, there is following description.
"If FB_MUX = 2 (CLKout6), then td0-DELAY, OSCin to CLKoutX 0-delay, increases 100 ps."
However, as I described on previous question, it seems that tpd-delay value of clkout5 and clkout6 is same(300ps).
I'm confusing which information is correct. Could you please clarify about this ?

BR,

  • 0
    TI__Mastermind 28550 points

    Hello,

    Ryuuichi machida said:
    Q1, According to datasheet, "td0-delay" spec for CLKOUT5 and CLKOUT6 is defined max "300ps" and min "-300ps".
    I believe that this spec consider temperature, but can not understand whether this depends on output frequency or not ?
    Is this spec not related to frequency ?

    Since frequency is not specified, there is no dependence on frequency which would take it out of the min/max specified.

    Ryuuichi machida said:
    Q2, According to datasheet, there is following description.
    "If FB_MUX = 2 (CLKout6), then td0-DELAY, OSCin to CLKoutX 0-delay, increases 100 ps."
    However, as I described on previous question, it seems that tpd-delay value of clkout5 and clkout6 is same(300ps).
    I'm confusing which information is correct. Could you please clarify about this ?

    Both CLKout5 and CLKout6 min/max ZDM is within the +/- 300 ps range.  However the CLKout6 is +100 ps relative to CLKout5.

    73,
    Timothy

  • 0 in reply to Timothy T
    Guru 11790 points

    Hello Timothy-san,

    Thank you for your reply.
    But I can not understand about following reply.

    >Both CLKout5 and CLKout6 min/max ZDM is within the +/- 300 ps range.  However the CLKout6 is +100 ps relative to CLKout5.
    According to above, there is possiblity that td0-delay of CLKout5 become 300ps. In that case, how should I consider for td0-delay of CLKout6 ?

    Idea1 : Since td0-delay of Clkout6 should be within 300ps. So, td0-delay of CLKout6 is 300ps (ignore relative to CLKout5).

    Idea2 : Since CLKout6 is +100 ps relative to CLKout5. So td0-delay of CLKout6 is 400ps (there is possiblity that this spec is over 300ps).

    BR,

  • 0 in reply to Ryuuichi machida
    TI__Mastermind 28550 points

    Hi,

    Sorry for the confusion.  Maybe this is more clear:

    Min/max are the same +/-300 ps.  The typical value of CLKout6 is +100 ps from CLKout5 typical value.

    73,
    Timothy

  • 0 in reply to Timothy T
    Guru 11790 points

    Hello Timothy-san,

    I see. I understand that you pointed out following highlighted red(this difference is approx 100ps.)
    Is that correct ?



    BR,

  • +1 in reply to Ryuuichi machida
    TI__Mastermind 28550 points

    Hello Ryuuichi-san,

    This is correct.

    73,
    Timothy