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LMK05318B: maximum clock output power

mien nee lee
Prodigy 10 points
Part Number: LMK05318B

Can the clock output be configured to at least 10dbm power?

  • 0
    Intellectual 640 points

    Hi

    I have a LMK05318B Evaluation board and I did some measurements:

    I'm using 32MHz LVCMOS type output at 50ohm load, and the output level is between +6 to +6.5dBm (for the 1st 32MHz harmonic only)

    I also measured the entire signal bandwidth using a power meter, the signal power is about +9dBm at 50ohm load.

    If you require at least +10dBm and your output load is 50ohm, I'm not sure it is possible.

    If your output impedance is high, I think you'll be ok but the output will no longer be 50ohm matched and you will need to keep it very short in order to avoid reflections.

    Nir

  • 0
    TI__Genius 16585 points

    Hi Mien,

    Per Nir's comments, 10 dBm power cannot be guaranteed. The maximum output swing is spec'ed in the datasheet as follows:

    Regards,

    Jennifer

  • 0 in reply to Nir Alon
    Prodigy 10 points

    Hi Nir,

    Thanks for checking on the eval board.