Quote Originally Posted by mrx23
Thx, I will try the shifting.
I choosed the Max 148 ADC becouse its free
You can order sample www.maxim-ic.com
The other reason:
I want minimal pin usage for SPI, so the rest of the PIC pins
can be used for Switches.
Free is a GOOD PRICE. Here is another way to look at it:

MAX 148 = 20 pin
PIC16F168A = 18 Pins
16 IO pins (-2 if using an Ext OSC)
(-4 for SPI Interface)
= 38 Pins for 12 usable IO Pins (or 10 with ext OSC)

Pic18F2620 = 28 Pins
24 IO pins (-2 if using an Ext OSC)
10 ADC (leaves 14 IO PINS remaining)
= 28 Pins for 14 usable IO Pins (or 12 with ext OSC)

Just my 2 cents,
Steve