It sounds like an un-shielded interconnect.
If you have a long interconnect that is un-shielded, it can act like an antenna and pick up RF (Radio Frequency).
Try a shielded IC and see if that help.
If you have a long interconnect that is un-shielded, it can act like an antenna and pick up RF (Radio Frequency).
Try a shielded IC and see if that help.