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LMX2572: Phase adjust time

Part Number: LMX2572

Dear,

   I'm using the LMX2572.

   In the example of the Phase Adjustment from the datasheet, If we write 800 to MASH_SEED 40 times, then we will shift the phase by  360°.  I want to know how long it costs to adjust the phase every time we write 800 to MASH_SEED. In my experiment,  it may cost 5 seconds after writing the MASH_SEED. The PLL_DEN is 625000000, CHDIV is 32, P is 1, MASH_SEED is 370370370, and the phase shifr is 6.666 degree.

   Is there any way to decrease the time?

   Best regards, Thank you.