Yes, it is a low ankle sprain, which is not as bad as the high ankle sprain which typically carries the recovery time of 4-6 weeks. From what I've read, a high ankle sprain typically means twice as much recovery time as a "normal" (or lower) ankle sprain. So that could mean that Spoon could wind up missing 2-3 weeks.
So he could be back next week, or it could potentially take another week to recover. This is the point where fun gus jumps in and says we should rest him an additional week regardless of whether he's ready to come back next week. And truthfully, I would not disagree with him.
Spoon will be missed vs. New Orleans, but not so much against Arizona. Getting him back for the Bucs game will be good because that's likely to be a very physical game, and we'll need him to slow down the "Muscle Hamster."
Rub some dirt on it and get out there ya lazy bum!