• problem about AD9518-4 not to get locked

    Hello!
    Thank you for your time and help!
    I try to use a clock generator chip AD9518-4 to get two 256MHz clocks form 10 MHz reference, the R divider is 5 so the frequency to  PFD
    is 2MHz . I set N divider =768 with B =48 and P=32. But I can't get the clock…
  • How do I program  AD9518-4 from ADIsimCLK?

    I have updated the eval board software using AD9516_17_18_Evaluation_USB_Flash_Programmer.

    I can communicate with the board using the AD9516_17_18_evaluation_software_full_install

    I have manually installed the drivers on the computer so the board is…

  • AD9518-1 eval board unlock/horrible phase noise

    I just received the eval board for the 9518-1 and it has very bad phase noise performance. 1st off I have tried to lock it to a 10,20,50,100 or 200 MHz clock in both single ended, on ref1 or ref 2 and as a diff signal on both inputs. I am trying to generate…

  • 问题: AD9518内部锁相问题

    版主好:
    现在使用AD9518-1,REF1输入频率为40M,R
    divider设置为8,A=0,B=15,P=32
    想用内部锁相环和VCO输出2.4G,内部锁相环已经设置为on。VCO也已经可以校准。
    读取0x01F的值为0x4E,锁相环未锁定,请指教!
    寄存器设置如下
    AD9518_WDATA(0x00,0x00,0x18);

    AD9518_WDATA(0x00,0x10,0x7c); //PLL enable
    AD9518_WDATA(0x00,0x11,0x08);
    //01 R=8
    AD9518_WDATA…

  • AD9518-3, Phase noise due to two Ref clocks.

    Hi,

    I'm using the AD9518-3 to generate a 1GHz clock for my DDS.

    I provide REF1 in the form of a 10MHz TCXO, single ended.

    The AD9518-3 produces beautiful 1GHz outputs. The phase noise is better than my portable HP spectrum

    analyzer can measure…

  • AD9518-4 不能锁定的问题

    您好!

    我使用一块贵公司的时钟芯片AD9518-4来产生256MHz时钟,使用10MHz的参考信号。设置R=5N=768A=0 B=48 P=32)所以进入PFD的信号频率是2MHz2MHz,环路滤波器通带54.8kHz 相位裕量 40 deg使用ADIsimCLK设计。

    现在的问题是DLD显示低,寄存器0x01f最低位 锁定位也是0CP直流3.3V(最大能力提高VCO频率),使用Status管脚显示N分频器的输出,显示频率只有900kHz 左右 且不稳定(应该是2MHz)。设置寄存器参…

  • AD9518-4 不能锁定的问题

    您好!

    我使用一块贵公司的时钟芯片AD9518-4来产生256MHz时钟,使用10MHz的参考信号。设置R=5N=768A=0 B=48 P=32)所以进入PFD的信号频率是2MHz2MHz,环路滤波器通带54.8kHz 相位裕量 40 deg使用ADIsimCLK设计。

    现在的问题是DLD显示低,寄存器0x01f最低位 锁定位也是0CP直流3.3V(最大能力提高VCO频率),使用Status管脚显示N分频器的输出,显示频率只有900kHz 左右 且不稳定(应该是2MHz)。设置寄存器参…

  • AD9518 鉴相器工作频率20M时,不锁定

    ad9518-4,改芯片用过好多次,这次应用相噪要求较高,鉴相器工作频率20MHz。发现如下问题:

    鉴相器工作频率20MHz下,环路滤波器带宽设置为250k、100k、50k都不能锁定;

    环路滤波器带宽设置为50k时,鉴相器工作频率设置为10MHz,就能够锁定

    鉴相器工作频率比较高时,应该注意哪些问题,请各位专家帮忙解答一下。谢谢!

  • RE: AD9518与AD9522的VCO校验后无时钟输出问题

    请发给我们 1. AD9518寄存器配置,2. 配置顺序 , 3. ADISimCLK的仿真文件, 4.PDF格式 原理图。

  • Arduino UNO and ADXL345 getting 0 0 0 OR -1 -1 -1 outputs with SPI communication

    I have EVAL-ADXL345Z evaluation board from Analog Device hooked up to the Arduino UNO R3, the code complies and runs fine. At first I could still get…