• HMC840 and HMC829 rapid frequency hopping

    We are using HMC840 and HMC829 devices, both with 100 MHz phase detection frequency (PDF). We need to perform frequency hopping (in a range of about 100 MHz) and do it as fast as possible (preferably less than 100 usec.).

    I have the following questions…

  • RE: PLL VCO Evaluation Software

        I have used HMC833 HMC830 HMC840 HMC829 HMC820。

    I need to improve my  PLLVCO products phase noise。

  • Lock window calculation for HMC840LP6CE issue

    Hello,

    I experienced some problems with lock detect at -20C to -40C  for PLL HMC840LP6CE.

    The lock detect window after the calculation have to be near 7ns (by old user guide)  to answer for all temperature span but PLL is not locked , even if I move the…

  • Shock&vibration environment for Hittite PLL

    Hello,

    We are using with HMC840 PLL in Fractional Mode and 100MhZ REF. We experience some issues at vibration&shock even when Reference don't pass through same vibration environment. I see some spurious near carrier and even loss of lock with RF power…

  • 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…
  • Hmc829 isolation between analog and digital inside the chip

    Hello,

    I'm using HMC829 RF PLL evaluation board I run the configuration from examples that Hittite provided,

    at the RF output I see some spurious at different places that running through small band =1MhZ when I click on read lock register(12h) with…

  • 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…

  • How do I use the SPI Mode Selection feature on HMC PLL's & PLLVCO's?

    This note discusses best practices for use of the Serial Port Interface (SPI) Mode selection feature of HMC PLL and PLLVCO product lines.

  • 'Must Knows' about ADI's family of Hittite PLL+VCO and Clock Timing products

    The attached FAQ document provides additional information on the use of the PLL+VCO and Clock Timing family of products.  Specifically,

    the applicable products are:

    HMC820LP6CE             HMC821LP6CE             HMC822LP6CE             HMC824LP6CE             HMC826LP6CE

    HMC828LP6CE             HMC829LP6…