your defines are ok.

A0 VAR WORD
DEFINE ADC_BITS 10
DEFINE ADC_CLOCK 3
DEFINE ADC_SAMPLEUS 50
TRISA = 255 ' Set PORTA to all input
ADCON1=%10000010 'This gives me 8 bit results
ADCIN 0, A0 ' PORTA.0 PIN 13
SEROUT PORTC.5,6,[" A0 = ",#A0,10]

note!
When use 8 bit PIC then working this only with 8 bit resolution. Check datasheet from your PIC