> Is there any app notes
Follow the design and layout guides from the PHY manufacturer.
Meet requirments of VITA 46.0-2007 (VITA 48) for safety ground and and levels of ESD resistance.
> If it is void how will it get the reference
Extend the chassis ground region from the VPX connector ESD ground to the magnetics. No signals should pass through this region except for external interfaces. This region can be connected to the chassis, cable shields and safety earth ground.
>do i have to connect a therm plane reference isolated from other digital grounds
Floating thermal plane reference may cause EMI issues. It is preferable to connect it to digital ground and apply similar design rules with the respect to decoupling and EMI/ESD protection.
Have a great day,
Pavel
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------
