We are using the LMK04110 with 100M Hz as input with the same as output and the variation possible is 5600ppm. What should be my VCXO frequency?
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We are using the LMK04110 with 100M Hz as input with the same as output and the variation possible is 5600ppm. What should be my VCXO frequency?
Hello Pearl,
My understanding is that you are...
You have a few options for VCXO frequency. Since you are using a clocking device with an integer-N PLL, you want to pick a VCXO frequency that has a good integer relationship to the VCO frequency of your clocking device. Since you will use 1200 MHz for the VCO frequency, I suggest...
The problem you will run into, is the tuning range of the VCXO however. +/- 5600 ppm is quite large! Many will tune a smaller range like +/- 100 ppm. You many need to look into an external VCO which would not have as good jitter cleaning, and you may be better of with a single loop clock generator. Then you don't have to have an external VCXO + clocking chip.
73,
Timothy