AD8000&AD8001 PCB design issues

Hello,

I'm designing AD8000&AD8001 for testing purpose. The AD8000's datasheet says:"Do not use ground and power planes under any of the pins of the AD8000." Is this means that I have avoid copper of the ground (or power) plane adjacent top layer? 

Below is my baord's layers structure:(Do i have to remove some copper of the Agnd1 just under the AD8000&AD8001?)

And here is the AD8001 and AD8000 used in my new test board:

Anybody can show me an example of this?

Parents
  • Hello Anna,

    Thanks for you reply me quickly.

    1. Unfortunately, i can't view the art files, for i don't have cam software. Could you help to take some pictures and show them here?

    2. Our signal link is very long, and our test board will not only test AD8000&AD8001(act as adder).

    3. Acually, i want to ask you experts below simple questions:

         1). If is it necessarry for customers to remove those groud or power plane area?

         2). If 1) is yes, then how to do it? Which region should be removed? For me, my board have severy ground and power planes. Do I just need to remove the AGND1 plane (which just under the top layer) or need to remove all ground and power planes?

    BTW, for some high speed boards, i saw just remove the plane under the surface layer (top layer) to control impedence. As below picture show:

    Best Regards

Reply
  • Hello Anna,

    Thanks for you reply me quickly.

    1. Unfortunately, i can't view the art files, for i don't have cam software. Could you help to take some pictures and show them here?

    2. Our signal link is very long, and our test board will not only test AD8000&AD8001(act as adder).

    3. Acually, i want to ask you experts below simple questions:

         1). If is it necessarry for customers to remove those groud or power plane area?

         2). If 1) is yes, then how to do it? Which region should be removed? For me, my board have severy ground and power planes. Do I just need to remove the AGND1 plane (which just under the top layer) or need to remove all ground and power planes?

    BTW, for some high speed boards, i saw just remove the plane under the surface layer (top layer) to control impedence. As below picture show:

    Best Regards

Children
No Data