I think that’s very tight. We flew Granada to Paris with a 65 minute connection on Iberia. We did not have to go through passport control, since we were staying in Shengen zone. Both of our flights were in terminal 4s. That terminal is HUGE. We walked quickly for about 20 minutes to get from gate 80ish to 40ish. When we arrived at our gate, boarding had started. We had to board a bus that took us out to the plane on the tarmac, then line up to board the plane.
Since you have to go through passport control and change terminals, that connection would make me very nervous. If your flight from Chicago is delayed, you miss your flight. I would give yourself another hour, just to be safe.