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LMX2572: LMX2572 phase noise

Part Number: LMX2572

With a reference clock of 10 MHZ, the LMX2572 outputs 3850MHz with a phase bias of 100Hz, How much can the phase noise be achieved when 1KHz and 10 KHZ. 

  • Hi Hui,

    You can use PLL Sim (https://www.ti.com/tool/PLLATINUMSIM-SW) to simulate the phase noise. 

    To get a more accurate simulation, you should include the phase noise of the reference clock in the simulation.

    Please note, the slew rate of reference clock will impact PLL noise. At 10MHz, the slew rate is very bad if it is a sine wave clock. PLL Sim is not able to take care of the impact due to slew rate, so if your reference clock is indeed sine wave, the actual performance will be worse than simulation.