There are several critical signals which require specific care during board design:
- Analog input and clock signals
- Make the traces as short as possible, and avoid vias where possible to
minimize impedance discontinuities.
- Traces can be routed using loosely coupled 100Ω differential traces.
- Match differential trace lengths as close as possible to minimize phase
imbalance and HD2 degradation.
- Digital LVDS output interface
- Route traces using tightly coupled 100Ω differential traces.
- Power and ground connections
- Provide low resistance connection paths to all power and ground pins.
- Use power and ground planes instead of traces.
- Avoid narrow, isolated paths which increase the connection resistance.
- Use a signal, ground, power circuit board stackup to maximize coupling between
the ground and power plane.