• HMC820锁相环使用一段时间后失锁

             HMC820锁相环工作大于3个月时间后有些芯片失锁有30%（大概有100块），通过重新更换锁相环芯片的方式，主板正常工作，现在想读取锁相环里面的程序，请问有什么办法吗？现在找不到失锁的原因。

  • HMC820如何配置VCO子系统寄存器才能只输出二倍频？

    想要得到4.8GHz信号，但按照手册上所说，VCO Reg02设置为8395 ，VCO Reg03设置为D11D，始终输出2.4G左右信号，4.8G附近有输出但是功率特别低。请问应该怎么配置寄存器才能只输出2倍频？

  • RE: Register programming sequence of the HMC765

    Thank you very much dyoung1,

    Please attached example configuration files for HMC765 and HMC820 (f0/2 mode board). File which you attached is only  HMC820 (f0 mode).

    DanVN

  • RE: Gerber for Evaluation PCB of HMC820LP6CE and HMC765LP6CE

    I've attached the HMC820 and HMC765 gerber files.

    • attachments.zip

  • RE: PLL VCO Evaluation Software

        I have used HMC833 HMC830 HMC840 HMC829 HMC820。

    I need to improve my  PLLVCO products phase noise。

  • TAGS LIST: Clock and Timing

    LTC6953
    LTC6955
    LTC6957-1
    HMC6832
    HMC7043
    LTC6950
    LTC6954
    HMC987
    AD9576
    AD9508
    HMC1035
    HMC988
    HMC1033
    HMC1034
    HMC1032
    HMC1031
    ADN4670
    ADCLK944
    ADCLK950
    ADCLK948
    ADCLK846
    ADCLK954
    ADCLK946
    ADCLK854
    AD…

  • RE: Frequency Sweep using HMC834LP6GE

    Thanks a lot. So, at a high level, this does work: I first load HMC834 into the evaluation software and get it to lock by loading its register file. Then, I close the evaluation software and open it again, but this time using HMC820 settings (the lock…

  • Recommended regulators for ADI PLLs and VCOs

    PLL Recommended regulator
    Low power standalone PLLs and the ADF4360-x narrowband PLL/VCO family (< 100 mA); e.g. ADF41xx, ADF42xx, ADF4360-x

    Use the ADP150 regulator; good performance, low cost.

    Use…

  • RE: HMC832 PLL

    Both HMC830 and HMC832 will meet these requirements but the application must utilize a tunable reference and manual tuning to meet the -60dBc spurious and hop time requirements.  I've attached an appnote on manual tuning.  With a fixed 50MHz reference Figure…

    • Fast_Frequency_Hopping_Application_Note.pdf

  • HMC830 Frequency Hopping - Direct LUT ?

    Hello,

    I'm working with the PLL VCO HMC830.

    I want to use a look-up table (LUT) for manual calibration, as decribe in "Frequency Hopping with Hittite PLLVCOs Application Note" (attached) (https : // www . hittite.com/content/documents/application_notes…

    • Fast_Frequency_Hopping_Application_Note.pdf