It is recommended to use differential clock distribution in cases where there are multiple ADCs or when the clock source is located far away. This is beneficial for reducing electromagnetic interference (EMI) and preventing noise from digital sources, which can be radiated or propagated through the waveguides in multilayer PCBs. The differential pairs should be positioned close to each other and away from other signals. Both sides of the differential pair should be protected with copper, which should be spaced at least three times the distance between the traces, and should be grounded using vias that are no more than 1/4 inch apart

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