Smith said that Ellington adds the threat of running to the Cardinals' game and that his players would have to get the job done against the youngster.
"They've got a guy that I think is playing very well for them, the rookie from Clemson," Smith told the club's official website. "Andre Ellington, they like to get the ball in his hands.
"He has had 32 targets thus far. They will move him out of the backfield, so he is the guy we are going to have to contain. He is capable of having that type of an explosive run that we gave up last year."
The Falcons are currently 2-4 to start the new season.