Analog Devices ADRV9005 Reference Manual page 295

Reference Manual
PRINTED CIRCUIT BOARD LAYOUT RECOMMENDATIONS
Figure 281 shows an example of how to place the ferrite beads, reservoir capacitors, and decoupling capacitors. The recommendation is to
connect a ferrite bead between a power plane and the ADRV9001 at a distance from the ADRV9001. The ferrite bead supplies a trace with
a reservoir capacitor connected to it. That trace is then shielded with ground and provides power to the ADRV9001 power pin. Place a 1 µF
capacitor near the power-supply pin with the ground side of the bypass capacitor placed so that ground currents flow away from other power
pins and their bypass capacitors.
Figure 281. Placement Example of Ferrite Beads, Reservoir, and Bypass Capacitors on ADRV9001 Customer Card (Layers: TOP, 3-Power, and BOTTOM)
There are two possible power-supply architectures for ADRV9001 transceivers.
High-performance, low-risk four power domains:
►
1.8 V digital
►
1.8 V analog
►
1.3 V analog
►
1.0 V digital
►
This approach uses the ADRV9001 internal LDOs to generate 1.0 V for all internal blocks.
recommendations for this architecture.
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ADRV9001
Figure 282 outlines the power-supply routing
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