The ADC3681 recommends using ferrite beads on the outputs of LDO used to provide the AVDD and IOVDD supplies as shown in Figure 9-8 of the data sheet. Is there a recommended bead or spec for the bead that should be followed?
The eval board uses switchers for these voltages with a large Murata bead/filter on the outputs, while other LDOs on the board that power clocking and input amplifier use a simpler 120 ohm (@100 MHz) bead. Would this 120 ohm bead work for the AVDD LDO output?
