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Which Clock IC will support TCXO clipped sine wave input?

g.f.
Guru 15520 points
Other Parts Discussed in Thread: LMK03806, CDCLVC1310, LMK00105

Hi,

I have a question about clock IC.

I'm searching for the clock buffer which support "clipped sine wave" input from TCXO.
Is there any TI clock buffer IC which support the following:
/////////////////////////////////
*TCXO clipped sine wave input
*3 output
*output level : LVPECL or CMOS
*Max 27MHz output
/////////////////////////////////

It seem there are no TI clock buffer which matches.
Therefore, I wonder if the following TI clock generator can be the solution:
///////////
*LMK03806
*CDCLVC1310
///////////
Is it available? If not which TI clock IC can be used for my request?

best regards,
g.f.

 

  • 0
    TI__Mastermind 24205 points

    Hi,

    Here is some data on LMK00105 that you might find useful

    We suggest you drive the TCXO output into the OSCIN input (via AC coupling cap) as shown in the datasheet

    Below is some test data for LMK00105 that compares the output phase noise floor (offset >5 MHz) when OSCin or CLKin is driven by a 0.9Vpp sinewave input at various frequencies.  OSCin performs better than CLKin up to about 150 MHz.

    Frequency (MHz)             OSCin (dBc/Hz)                 CLKin (dBc/Hz)

                    10                           -145                                       -123

                    20                           -148                                       -130

                    40                           -149                                       -140

                    50                           -150                                       -143

                    75                           -150                                       -146

                    100                         -151                                       -141

                    150                         -147                                       -147

                    200                         -150                                       -149

                    250                         -139                                       -143

                    300                         -144                                       -148

    Regards

    Arvind Sridhar

  • 0 in reply to Arvind Sridhar
    Guru 15520 points

    Hi Arvind,

    Thank you for the reply and the details.
    I understood.

    best regards,
    g.f.