• AD9520-3 Phase Noise, Simulation vs Measurements


    I am using AD9520-3 for clock generation on my custom board. Input reference clock is 10MHz OXCO output with -155dBc/Hz phase noise (PN) at 10KHz offset. I am setting AD9520-3 VCO to 1800MHz and divide by 2 to get 900MHz provided to channels. I…

  • AD9520-3 EEPROM settings aren't loaded

    We are using an AD9520-3 Clock generator in one of our designs, but
    unfortunately we are experiencing some problemen with respect to the loading of
    the eeprom settings, stored inside the AD9520's eeprom memory.

    We have pulled…
  • 1800 MHz and 900 MHz synchronously generation by AD9520-3 internal VCO


    I would like to generate 1800 MHz and 900 MHz clocks by using internal VCO which is built-in AD9520-3.

    Datasheet contains following information.

    But in the same time.

    Could I synchronously generate 1800 MHz and 900 MHz by AD9520-3 internal…

  • AD9520-3的输入参考时钟,单端150mV VPP是否可以

    目前我们使用AD9520-3作为AD9467的时钟,采用外时钟10MHz作为9520 ref2的单端输入。

    我们发现,当10MHz 为500mV VPP输入时,我们的采集信号在中心点有鼓包,当10MHz我们衰减到150mV VPP时,中心点鼓包会更大。

    问题:9520 差分输入配置未单端输入时,其最小输入摆幅是多少。前端是否可以加芯片,去识别更小摆幅的信号,能帮忙推荐一下么。

  • Difference between AD9520-1 and AD9520-5

    Hi all,

    I have an AD9520-5/PCBZ and need one more. So I tried searching for it on digikey, newark and mouser, but couldn't find it. Therefore, I am considering AD9520-1/PCBZ instead.

    My question is,

    1. Difference between AD9520-5 and AD9520-1…

  • RE: AD9520/22 Evaluation Board

    Hello Paul,

    I'm trying to connect AD9520/PSBZ (rev B), AD9520-3 to 64-bit window 7. I'm not sure if AD9520-3 and AD9520/22 are using the same software. Is there any new solution to this problem rather than install 32-bit window XP on virtual machine…

  • RE: ad9520 PLL lock problems

    ADI new Clock and Timing Forum is available here:


    you may want to consider reposting the question there.

    In the meantime:

    -Did you use the AD9520-3? This is the device that has the 2GHz range.


  • RE: Some questions about using AD9520


    sorry for the delay in getting back to you. We were in shutdown for the winter holidays.

    Could you please send me the schematic of the AD9520-3 board? I want to make sure you copied the evaluation board schematic on the required external circuitry…

  • RE: AD9520 (and equivalent) driven with TCXO

    Hi Alon,

    The AD9520 can be driven with a TXCO with either single ended or differential outputs.  The AD9520 provides a self biased receiver so most differential inputs can simply be ac coupled.  Please refer to the PLL reference inputs section of the AD9520…

  • Some questions about AD9520 PLL locking

    Hello,I have some questions about using  AD9520 PLL.

    I make a board of AD9520-3 .The REFCLK is 25MHz.The configuration of the PLLare shown below: R=100; N=8000; charge pump is 4.8mA.I design the PLL loop filter by ADIsimCLK as so:


    I want the output signal…