16 Channels of 15V Analog Inputs... Any Suggestions?

lxmyers:
Hi All,
I'm trying to finish off a project I started a while ago but I've been having a bit of trouble with the Analog Inputs...

What I'm trying to do...
I need to be able to read the voltage of 16 individual inputs with a reasonable level of precision (12bit, maybe?). Input voltages could be anything between 5VDC and 15VDC.

Can anyone provide any suggestions on a way to do something like this?

Any help would be greatly appreciated.
Thanks Guys,
Alex

If you want full accuracy in the 5v to 15v range, then you will probably need to electrically block the lower 5v before sending the resulting 10v to the A/D pin/device. You might be able to use one of the below to multiplex the voltages and multi turn trim pots to act as the voltage bridges.