For this example, follow these
guidelines:
- Isolate outputs using a GND shield. Route all outputs as differential
pairs.
- Isolate outputs to adjacent outputs when generating multiple frequencies.
- Avoid impedance jumps in the fan-in and fan-out areas when possible.
- Use five vias to connect the
thermal pad to a solid GND plane. Full-through vias are preferred.
- Place decoupling capacitors with small capacitance values very close to the
supply pins. Place the decoupling capacitors on the same layer or on the bottom
layer directly underneath the device. Larger values can be placed more far away.
Ferrite beads are recommended to isolate the different output supplies and the
VDD supply.
- Use multiple vias to connect wide
supply traces to the respective power planes.