Connecting bandpass filter to comparator generating excess noise
The impedance and noise from the 2.5V potential divider from pin 4 of the comparator is too high, for a 82 Load (R55).  Use a better source Z(f) with 0.1 Ohm impedance @100kHz  and &lt; x ohms otherwise.

Rev A

Consider scale Filter up 10x to 100x in impedance and decouple 2.5V with a big cap.



There is not need for low R value to go to 2.5V since it is AC coupled.  This makes this node a noise source from 2.5V with high gain.  ~R8/R55 ?? 50dB gain

For better bandstop rejection I might consider a quad OA with an 8th order filter.  Here testing with 25mVp signal.