CARJ INITIATES EVASIVE MANEUVER DUE TO WAKE TURBULENCE OF PRECEDING MD80 ON APCH TO ORD.

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ON APPROACH ILS RWY 22R. OM GS APPROXIMATELY 5 NM BEHIND MD80. OUR ACFT BANKED SEVERAL TIMES VIOLENTLY AT ONE POINT REACHING 40 DEGREES BANK TO THE RIGHT AND UNABLE TO CONTROL WITH NORMAL CONTROL INPUTS. I ADDED POWER AND TURNED LEFT OF THE LOCALIZER TO EVADE THE WAKE TURBULENCE. APPROACH CONTROL QUERIED THE REASON FOR OUR TURN AND WE HAD TOLD HIM WHAT HAD HAPPENED. THE CONTROLLER WAS CONCERNED DUE TO SIMULTANEOUS APPROACHES TO RWY 22L. WE HAD THE PARALLELING TFC IN SIGHT AND AT NO TIME DID WE GET CLOSE TO ANY TFC TO CAUSE AN UNSAFE SITUATION. THE MD80 MAY HAVE BEEN HIGH ON THE GLIDE SLOPE AND WE WERE RIGHT ON GS. HE WAS SHOWING LOWER ON OUR TCAS (RELATIVE TO OUR ACFT'S ALTITUDE). THESE WAKE TURBULENCE ENCOUNTERS OCCUR VERY OFTEN GOING INTO ORD REGARDLESS OF ACFT TYPE AND PROPER SEPARATION (WHEN LEADING ACFT IS LARGER THAN THE CL65). CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR ADVISED THAT THIS WAS HIS FIRST; REAL TIME WAKE TURBULENCE INCIDENT. ALTHOUGH HIS PREVIOUS ACFT WAS A LARGE; ACR TURBOPROP; HE FELT THAT THE CARJ WAS EXTRA SENSITIVE TO WAKE TURBULENCE; BEING A 'REAL HANDFUL.'