"MSC1210 family from TI/Burr-Brown"

I was requested to have a look at the preliminary versions of these chips and without having designed with them, it is my impression that they have a very good isolation between analog and digital. E.g. there are 2 unused pins on the chip allowing you to run a ground trace to shield the analog pins from the digital. Also they have built in hardware averaging. If I were to design a system requiring A/D resolution beyond 8 bits I would definitely look at using one of those. Do remember that whenever you mix anaalog and digital in whatever fashion the PCB layout is the determining factor as to how well the system will work, do not even think about a 1 or 2 layer board, without a ground plane you WILL fail. Also you will need a separate analog ground connected to the digital ground ONLY where the power supply ground enter the board. You will need decoupling, decoupling and more decouplin.

Erik