You can calculate the reolutionresolution from the megapixels like this:
ppi = sqrt(mp * 1000000 * 3/2) * 25.4 / 36
Which gives you:
6 mp = 2117 ppi
7 mp = 2286 ppi
8 mp = 2444 ppi
9 mp = 2592 ppi
10 mp = 2733 ppi
11 mp = 2866 ppi
12 mp = 2993 ppi