• HMC821

    I use hmc821 instead of hmc834,the frequency i need is 1970M,but actually  i only obtain maxim frequency is 1860M,and i check TUNE is 5V , it didn't reach the datasheet  frequency range from  1720-2080

  • HMC821 frequency synthesizer

    Hi,

    We designed a PCB for @HMC821 frequency synthesizer as much as similar to the one depicted in the datasheet of HMC821. and we load registers as below to obtain 1900MHz RF at the output

    reg02  : 00000001

    reg06:  0003074a

    reg09: 00003264

    reg05: …

  • RE: hmc821lp6 vco issue at high temps

    HMC821's Id (Vcc1,Vcc2) drops slightly when the issue appears (by aproax 2mA, 68mA-2mA = 66mA in total)

  • 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…

  • 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…

  • HMC821LP6CE无法读写寄存器

    我们在使用ARM控制器配置HMC821LP6CE芯片，开发板加电后，由于不知道SPI到底工作于哪种模式，因此尝试了SPI的两种模式，但无论使用OPEN MODE SPI还是HMC Mode SPI均不能正常读取芯片寄存器的值，SPI读写速率约为600KHz，使用示波器查看MOSI引脚输出信号时序和datasheet一致，查看芯片RF射频输出引脚信号，可以看到大约1GHz的信号。不知道为什么两种方法均不能读取寄存器的值，这样没办法判断是否能正常写寄存器的值。

    目前不知道如何排查，期望得到大家的帮助…

  • 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.

    Attachments:

  • '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…