Hello,
I am currently using a design with 4 PHYs powered by two different supplies, 1 for 1.0V and 1 for 2.5V, both using the same model. In order to decouple noise coming from each PHY I was recommended a ferrite bead with decoupling capacitor next to each chip for each rail. The PHY's will be operating in 1gigabit mode using rgmii.
What would be a recommended ferrite bead for this application? Target frequency? I could not find any notes on possible output noise on the VDD10 and VDD25 linesin the datasheet for DP83867.
The switching supplies switch at 4 MHz.
Thank you!
