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AFE7686: switching noise showing up in IF

Part Number: AFE7686
Hey guys,
 
My customer has the following questions:
 
"We are observing spikes on IF outputs. The spikes are seen at 2MHz and 500KHz. Below is the power tree for AFE7686. We are following AFE7686 evaluation board design.
Blue color boxes are switching regulators and others are LDO. Above spikes observed are close to the switching frequency of regulators.
 
What is TI recommendation to overcome this issue? Does ceramic caps and increasing frequency will help?"
 
I am not sure who designed the EVM on your side, or how close my customer's layout is to the EVM, but considering you guys didnt seem to have issues with the EVM I thought I would ask before telling my customer they need to modify their layout to add filters or more low noise LDOs so there is one on every single rail going to the AFE.
 
Thanks,
Brian