• RE: ADF4158, ADF4159, ADF4169 software

    Hi FormerMember,

    I am trying to generate a FMCW waveform with EV-ADF4159EB1Z/EV-ADF4159EB3Z evaluation board. Is it possible to generate a pulse series as shown below on the EV board to trigger my ADC? Thanks.

  • ADF4169 READBACK

    Hi all,

    For frequency readback, the following sequence is described in the datasheet @ ADF4169.


    Figure 2. Write Timing Diagram
    Figure 3. Read Timing Diagram
    Figure 50. Reading Back Single Bits to Determine the Output Frequency at the Moment of Interru…

  • 关于ADF4159或ADF4169

    最近发现有越来越多的同志们使用ADF4159或ADF4169这两款芯片,其实这两款芯片差不多。使用时有越来越多的人遇到不同的问题。我们当时使用时也遇到相同的问题,也请教过ADI的技术支持和国外的原厂工程师,他们对两个棘手的问题也束手无策。1、跑动的毛刺杂散;2、呼吸噪声。这两种杂散主要还是在其处于小数模式下产生的,整数时都还好。那么第一种可以对频率加一点偏移量来改善。第二种可以改变环路带宽或芯片内部电流来改善。本人只能提供这两点建议,希望对大家有帮助。如果高手们还有其他解决办法,请一定不吝赐教。

  • 关于adf4169与adf4150hv的选择

    想产生一个5-7ghz的fmcw信号,pll芯片的选择有adf4169与adf4150hv,时间要求3ms左右,哪款芯片比较合适

  • ADF4159和ADF4169

      之前简单用过ADF4159这款芯片,在使用过程中发现有“呼吸噪声”这个现象,在环路带宽设置为几百KHz,环路电流配置为最大,2MHz内噪声上下抖动厉害。最近我再做相同实验,没有这个明显现象,这是芯片有改进了,还是我与之前做的不一致?

      最近发现出了ADF4169这款芯片,看其资料与ADF4159相差很小,而且硬件一样,寄存器几乎一样。我想问问ADF4169相较于ADF4159有什么很大升级吗?主要关心针对相噪和杂散的改进。ADF4169是否解决呼吸噪声的问题?

  • What is different between ADF4159 and ADF4169?

    Hello,

    I would like to know what is different between ADF4159 and ADF4169.

    According to the datasheet, ADF4169 has wide frequency range of RF bandwidth and PFD frequency but it doesn't have parabolic ramp.

    Are there any major changes?

    Best regards…

  • RE: ADF4159 Phase Coherence Between the chirp

    Due to the fractional N sigma delta engine that the ramp generation uses, this is quite difficult maybe even impossible.

    See here for more detail

     Phase consistency between two ADF4159/ADF4169 PLLs 

  • PLL device selection for frequency comparison circuit

    Hi,

    A university research institute is currently designing a frequency comparison circuit. They would like to compare the frequency between a 40MHz reference signal and a 40 + α MHz signal, and get the error signal from the charge pump output. For example…

  • RE: ltc6948能实现FSK控制嘛?

    您好,感谢对ADI 产品的支持。

    LTC6948是没有FSK的硬件管脚的,您可以通过控制寄存器实现FSK的功能。

    也可以看一下ADF4159/ADF4169, 都是带有FSK功能的PLL。www.analog.com/.../adf4159.html

  • RE: ADF4112 Fvco

    The only standalone PLLs we have that support FSK natively with dedicated trigger pins are the ADF4158/ADF4159/ADF4169, the HMC700 and the HMC703.

    I don't have any specific reference designs for implementing FSK with ADF4112 or any of our other standalone…