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LMX1204: Spur issue between channels

Matteo Ricci
Prodigy 180 points
Part Number: LMX1204

Hi,

I am interested in the use of the LMX1204.
In particular, i would like to receive information about the channel isolation between the channel CLKOUTx_P/N and SYSREFOUTx_P/N.
Are there any spurious issues?
Do you have measures available in this regard?

Thank you in advance.
Best regards.

Matteo Ricci
 
  • 0
    TI__Genius 12550 points

    Hi Matteo,

    LMX1204 part usually use case is to buffer/multiplier/divider JESD204B complaint clocks (clock out and SYSREF), where SYSREF is needed for JESD link establishment and may not  necessary to have ON always. May I know, what is the use case to have isolation number between the clock out and SYSREF?

    We may have preliminary silicon data number, which is better than -60dBc between the differential CLKout and SYSREFout (100MHz). And we'll confirm the numbers later on the final silicon. 

    Thanks!

    Regards,

    Ajeet Pal

  • 0 in reply to Ajeet Pal
    Prodigy 180 points

    Hi Ajeet,

    i want to use two pairs of CLKOUT_X and SYSREFOUT_X: 

    does the activation of the SYSREFOUT_X involve the presence of unwanted spurious on the CLKOUT_X?

    Thank you in advance.
    Matteo
  • 0 in reply to Matteo Ricci
    TI__Genius 12550 points

    Hi Matteo,

    There is no spurs observed at CLKout with SYSREF output enables except crosstalk as mentioned above.

    Do you have any critical specs requirement for spurs at CLKout?

    Thanks!

    Regards,

    Ajeet Pal