LMH0384 Datasheet, PDF (12/16 Pages) National Semiconductor (TI) – 3 Gbps HD/SD SDI Extended Reach and Configurable Adaptive Cable Equalizer

tween the BNC and the equalizer to ensure that the charac-
teristic impedance of this trace is 75Ω. Please consider the
following PCB recommendations:
• Use surface mount components, and use the smallest
components available. In addition, use the smallest size
component pads.
• Select trace widths that minimize the impedance
mismatch between the BNC and the equalizer.
• Select a board stack up that supports both 75Ω single-
ended traces and 100Ω loosely-coupled differential
traces.
• Place return loss components closest to the equalizer
input pins.
• Maintain symmetry on the complimentary signals.
• Route 100Ω traces uniformly (keep trace widths and trace
spacing uniform along the trace).
• Avoid sharp bends in the signal path; use 45° or radial
bends.
• Place bypass capacitors close to each power pin, and use
the shortest path to connect equalizer power and ground
pins to the respective power or ground planes.
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