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  1. #21
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    Re: Ferrite bead usage in ADC's

    Hi,

    Go to the AD1955 site (not EVAL).
    Or just type "AD1955" into the search of analog.com and you will find "UG-48 ..."
    That's it

    Klaus
    Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



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  2. #22
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    Re: Ferrite bead usage in ADC's

    Isolation between AGND and DGND in the 100 MHz or even GHz range isn't but an illusion. It neither works on the PCB level, because the planes are coupled planar structures nor on the chip level, because both are implemented on a common substrate, either directly connected on chip or maximal isolated by a diffusion well.

    Separated grounds serve a purpose for power supplies or for signal circuits in the DC to 100 kHz, possibly low MHz range.



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