ADC-FMCADC2 clocking

Hi,

I have a few questions about AD-FMCADC2-EBZ board(AD9625). 

1) I have very little experience with this field. So I want to see as many documents as possible. But I am not able to access the quick start guide. Isn't it available now?

http://wiki.analog.com/resources/eval/user-guides/ad-fmcadc2-ebz/quickstart 

2) AD-FMCADC2-EBZ FMC Board [Analog Devices Wiki]  this page says there are multiple options for clocking the AD9625. I don't know how to change the options. What do I have to do when I want to use a single-ended clock(both (SYSREF± and CLK±)? Do I need to de-solder something? 

Thanks in advance and sorry for my poor English.

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  • 0
    •  Analog Employees 
    on Dec 14, 2017 1:55 PM over 2 years ago

    Hi,
    1. You can find on the ADI wiki page AD-FMCADC2-EBZ FMC Board [Analog Devices Wiki]:

    Alternatively, the oscillator can be disconnected and an external clock source connected by only changing two components on the board.

    Yes you are right, de-solder R93, then populate the C91 and R81


    2. If you take a look at the AD625 datasheet you will find:

    For optimum performance, drive the AD9625 sample clock inputs (CLK+ and CLK−) with a differential signal. This signal is typically ac-coupled to the CLK+ and CLK− pins via a transformer or capacitors.

    3. As I understand R76 is a "termination resistor", you will probably deed it when connecting a differential clock to the board.
    Andrei

Reply
  • 0
    •  Analog Employees 
    on Dec 14, 2017 1:55 PM over 2 years ago

    Hi,
    1. You can find on the ADI wiki page AD-FMCADC2-EBZ FMC Board [Analog Devices Wiki]:

    Alternatively, the oscillator can be disconnected and an external clock source connected by only changing two components on the board.

    Yes you are right, de-solder R93, then populate the C91 and R81


    2. If you take a look at the AD625 datasheet you will find:

    For optimum performance, drive the AD9625 sample clock inputs (CLK+ and CLK−) with a differential signal. This signal is typically ac-coupled to the CLK+ and CLK− pins via a transformer or capacitors.

    3. As I understand R76 is a "termination resistor", you will probably deed it when connecting a differential clock to the board.
    Andrei

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