Applying ferrite bead in a high impedance circuit

[tszaboo]

Through the power supply for example. PSRR of these at high frequencies is almost zero. And any other cables.

So its coming through the power supply, into the IC, now its in the IC. Wouldn't it have made more sense to put the bead before the IC, instead of after it?
It has no value unless the REF was being used externally, which it isn't. And even then you'd use a much higher impedance and maybe a CLC format.

From your image alone, it's not obvious what's connected where. If that's an input or output or what's going on.

[thm_w]

From your image alone, it's not obvious what's connected where. If that's an input or output or what's going on.

Not my image.
Its obvious that its a REF output on the IC buffered by two capacitors, which goes nowhere else, because there is no net label or wire on those capacitors.