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[richard]

not sure whats going on here

my LM35 has a 0.3 volt output @30c, adc value 61 [10mV/deg]

an adc read of 675 would need 329 deg

i think i see the problem, if louis is using a 16f690 then the adc settings used are totally inappropriate
adc control on a 16f690 is quite different to a 16f88

define osc 4 ;there is no define called osc
adcon1.7=1 ;bit 7 is unimplemented
ADCON1 = %10001110 ;fosc/2 adc clk bits 0:3 and 7 are unimplemented


should be
define OSC 4 ;OSC = 4
adcon0.7=1 ;right justify result
adcon1= %00110000 ; frc adc clk