• AD9649: FAQ

    FAQ

  • How does the AD9649's input referred noise vary over the -40 to 85�C temperature range?

    Q 

    How does the AD9649's input referred noise vary over the -40 to 85°C
    temperature range?

     

    A 

    Input referred noise is kT/C thermal noise and thus will vary as the square
    root of the temperature in degrees K.  The input referred noise in the…

  • AD9649-80 analog input range

    Hello,

    I have 2 boards with AD9649-80 out of 5 same boards that the input analog range is smaller : 1.2 Vptp instead of 2 Vptp. I used a DC analog input to check this.

    I use  the 1V internal reference  and also measured the Vref pin which is  0.990 V.

    I use…

  • RE: 寻求一款10M倍频到40M的芯片，配套AD9649

    您这个看起来是在配置AD9269。读到器件ID寄存器是对的，但是写入后读出的不对，可以再看一下写时序是否正确。您可以参考这个文档进一步检查：https://www.analog.com/media/en/technical-documentation/application-notes/AN-877.pdf

  • RE: Power Sequence for AD9649

    Hi Sanchogus,

    You will have no problem powering up as you specified. 

    Please see the end of the Power and Ground Recommendations portion of the APPLICATIONS INFORMATION section of the AD9649 datasheet for the power sequencing requirements.

    Thank you.

    D…

  • Output Enable Configuration for AD9649

    I am trying to read output from my board with an AD9649 ADC.  I can read the ID and Grade, and I can write and readback all of the memory registers, but I don't see the data correctly.  I want to run a test such as when setting reg 0x0D, but the bits…

  • RE: AD9649 Maximum Differential Analog Input Voltage Range

    Thanks for your suggestion as well as solutions.

  • RE: AD9649-80 DCO jitter

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …

  • RE: AD9649 single-ended clock

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …

  • RE: Interface suggestion for AD9649

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …