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LMK04828: LMK04828 reference spur

Part Number: LMK04828
Other Parts Discussed in Thread: ADS5409

Hello.

I use clock cleaner for ADS5409 ADC. In the spectrum, without input signal, i see spurs   in the frequency Fs/32 - 853.33 / 32 = 26.66 MHz.

In Clock Design Tools i see reference spur in 80 MHz offset, and ~ 76 dB level. 

How can I reduce the level of Spur?

I tried using different values Integrated Loop Filter, but the level is not reduced.