• RE: What is the frequency of the ring oscilator for lock detect in the HMC765?

    We are using a 100 MHz reference and locking at a fixed frequency of 8 GHz with the HMC765.  You suggest: We recommend setting the lock window mid-way between the minimum (set by offset current) and the maximum (set by the reference period).

    We are in…

  • RE: 关于hmc765的问题

    问题一其实不是什么大的问题,只是觉得和datasheet的数据有一定偏差,而且换过4、5个片子均是在5.4V左右

    主要是问题二,如您所说,进芯片的控制电压均用电压表打过,都是正常。参考输入是100MHz,7dBm的样子,也是正常。您说的3、4点应该都是环路的问题,环路是采用环路仿真软件计算得出的。进芯片的数据端用示波器测试过,方波挺标准,数据也正确的。最后也就是问题了,给数据的时候,其他寄存器都配置好,最后给N的时候,重复多次传递N的值,有时候能够锁定,并且相噪也不错,但是这个时候再给一次N的值…

  • HMC807 EVB schematic bug

    Original Question: HMC807 EVB schematic bug by ray.wang@mtigroup.com

    I found HMC807 EVB schematic have a bug.

    The EVB schematic part index C62 is DEPOP.It should be 0 ohm.Am I right?


    Verified Answer: RE: HMC807 EVB schematic bug by MRichardson

    You are…

  • RE: HMC764LP6CE min REF input frequency

    Hi Kishore,

    The HMC764 is guaranteed to operate as low as 200kHz (yes kHz) but will typically work to 100kHz. To operate this low you'll need to use a square wave with adequate drive level. The expected swing is full 3V CMOS. I've attached the operating…

  • 关于HMC765寄存器配置问题

    谁能给一种整数分频的典型寄存器配置方案

    我现在不管寄存器配置成7.8G、8G还是8.8G,输出一直震荡在8.2G左右不受控制啊

    环路滤波器的带宽都设置成1M了,鉴相频率是10M,参考输入50M。

    目前的配置是这样的:

    4'd0:ctrl_word <= 32'b0_000000_0000_0000_0000_0000_0000_0001_0;//00h

    4'd1:ctrl_word <= 32'b0_000001_0000_0000_0000_0000_1000_0110_0;…

  • Equivalent Hours of HMC764LP6CE & HMC783LP6CE

    Dir Sir,

    I would like to know the equivalent hours of HMC764LP6CE & HMC783LP6CE. I cnn't find the information in the attached Reliability Report. How can I calculate that value?

    Best regards,

    Akira

  • HMC783(764,765,807) userguide error?

    I'm using HMC783 in my design recently, but I find the user guide of hmc783 is incompatible with it, while it is similar to hmc700 about register discription on Reg 0Dh GPO_SPI_RDIV Register (page A-21). The user guide mentions D1 & D0 pins, but HMC783…

  • RE: Multiple HMC807 on one SPI bus / Lock Detect

    Hi, 

    I've attached the user guide which covers the HMC764, HMC765, HMC783 and HMC807; this is also available on the product page on analog.com.  Please see page A-7,A-14, A-18, A-20 and A21.

    REG 0x07[10] enables the internal LD function but the Flag…

  • 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…