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LMK04816 issue

John J Wu
Genius 3870 points
Other Parts Discussed in Thread: LMK04816, CLOCKDESIGNTOOL

I’m looking at using the LMK04816 as central piece of our clk module. The new clk block is attached.

It seems that the LMK04816 is just a very good fit….

the External clk is 10MHz;

the Recovered/dirty clk is 10MHz minimum to 125MHz maximum;

I tried playing with the simulation tool provided on the web but I didn’t have too  much luck….

Thanks,

John 

  • 0
    TI__Genius 10320 points

    Hi John,

    Try using our Clock Design Tool found here: http://www.ti.com/tool/clockdesigntool

    Because the LMK04816 requires a VCXO or a tunable crystal, a more specific desired frequency plan may be necessary. However, from the information you provided a 100 MHz VCXO should work. (a 150 MHz VCXO would allow you to have a higher PLL2 phase detector frequency, but they are more costly).

    Running PLL2 VCO at 2.4 GHz would allow you to divide down to 800 MHz and 25 MHz simultaneously (as well as other frequencies).

    Gabe