RF Traces and Components

The RF trace from RFIOP (Pin #7) and RFION (Pin #8) of the ATWINC15x0B to the balun must be 50Ω differential controlled impedance. The route from the balun to the antenna connector must be a 50Ω controlled impedance trace. This trace must be routed in reference to the ground plane. This ground reference plane must extend entirely under the ATWINC15x0B QFN package and to the sides of the these routes.

Figure 1. Placement and Routing of Balun and Matching Components