Ethernet

Applicable receivers:  BD982

Since the magnetics are on-board, the ethernet interface can be implemented using only a RJ-45 connector, and termination discretes. See design example below:

Optional surge protection is provided by a Semtech SLVU2.8-4. To meet electrical isolation requirements, Trimble recommends using capacitors with a greater than 2 kV breakdown voltage.

Ethernet routing

Minimize the distance from the RJ-45 to the receiver main connector to prevent issues with conducted emissions.

The sample routing below shows a four-layer stack up, with dual-side board placement. The routing shown ensures that the differential pairs are routed over solid internal planes.

Top view

Bottom view