• RF sensitivity meaning in ADF4156 datasheet

    Regarding the ADF4156 datasheet, according to table 1, the RF IN (for single pin or for both pins combined??) require/s power between -10dBm to 0dBm.

    According to figure 5, it seems the RF power required is below -15dBm all over the usable range (I probably…

  • ADF4156 Design Issue at 1911.642 MHz

    Hello!

    I've been using ADF4156 to design Local Oscillators at frequencies in the range of 5 to 6 GHz.

    I use ADISimPLL and Fraction N software for the design.

    I haven't faced any difficulties in the LO design at the above mentioned frequencies;…

  • ADF4153, ADF4153A, ADF4154, ADF4156 and ADF4157 Software

    The latest ADF4153, ADF4153A, ADF4154, ADF4156 and ADF4157 evaluation board software is attached.

    Windows XP, Vista, 7 compatible.

    • v4.5.0: added improved prescaler warning.
  • ADF5001 和ADF4156的连接问题

    您好,

    请问ADF5001的RF差分输出端口可以直接通过微带线连接在ADF4156的RFA和RFB上吗,需不需要加终端的匹配电阻?

    还有每条单独的微带线的特征阻抗设计是不是应该是50欧姆?

  • 关于ADF4156不能锁定的问题

    近期使用ADF4156做一款发射机,在搭建PLL电路时,将配置程序写入时,观察MUX管脚(设置N分频输出和R分频输出)都能观察到频率为鉴相频率的周期性脉冲信号,但是VCO的输出频率一直不变,经测试,原因是VCO的输入控制电压一直为0V。使用ADISIMPLL软件进行仿真搭建的三阶无源环路滤波器,为什么没有将电荷泵的信号积分为要控制VCO的电压(2V左右)?另外,配置完毕MUX管脚(设置N分频输出和R分频输出)波形正确是不是说明晶振和配置程序都没问题?还应该怎么调试?弄了好久,请各位大侠解决

    附件1为ADISIMPLL仿真文件…

  • 关于ADF5001和ADF4156的连接问题

    您好,

    关于ADF5001和ADF4156的连接,参考设计上给的是最好用差分线来连接,但是没有给出如何详细的布设这一差分线,感觉这个应该比较重要,不知到有没有详细的参考设计图?我是个新手,对这个还不是太清楚,根据我的理解ADF5001差分输出阻抗是100欧,那在pcb板上如果使用微带线的话,对应于RFout - RFinA,和RFOUT_N - RFinB的微带线特征阻抗是不是应该设计成50欧,还有这个连接需不需要终端匹配? 如果需要的话应该如何进行匹配?

    还请大牛们给予帮助,谢谢!

  • RE: CN0174 schematics

    Hi Payam,

    The circuit described in Figure 3 of CN0174 consists of several PC boards connected together.

    We do not have complete schematics for the entire system, but we do have documentation for the individual evaluation boards for the ADF4156 and the…

  • RE: PLL Selection

    Hi Kevin,

    To achieve the 1kHz resolution across the full-band I think he will have to use a fractional-N PLL, like the ADF4156. The problem would

    be sourcing a VCO that can cover his range of 5MHz to 100MHz.

    One circuit suggestion would be to use a…

  • RE: PLL NOT WORKING IN TEMPERATURE

    Sir,

    Finally I could find out the problem.The pad of LNA detached (very very small portion) from the body.The image attached is taken using a magnifier having 110 zoom.HMC 587 output is divided using stripline power divider and given to ADF4156 and…

  • Phase consistency between two ADF4159/ADF4169 PLLs

    Is it possible to achieve phase consistency between two
    ADF4159/ADF4169 PLLs ?

    Two ADF4156 PLLs can be programmed to achieve phase consistency, in the datasheet this is explained in the PHASE RESYNC section. Unfortunately the ADF4156 does not have any…