Hi, i made a circuit using ADC0832, is simplest...
1.- Activate CHIP SELECT
2.- Send to ADC de mux addres to select ADC port/channel using CLOCK signal
3.- Receive the byte of conversion, MSB firts (test bit in input pin of PIC and set/clear carry to shift left the Carry on ADC_Resul byte register) or LSB firts (idem but shift right). both method needs a counter of 8 bits.
4.- Once received ADC_Result, put CHIP SELECT to LOW to deselect ADC.
I hope this help you.
Bye