pic16f876a ADC accuracy

[msnaggar]

hi all,
could any one to help my to have one bit change accuray when i use ADC for fixid Analog i/p like R=10 and ziner diode 2.32V ,i need to display to o/p as 2.32 v on the lcd i use FP24.inc in my program but i find fast change value range from 1.7 to 3 v on the lcd. i use lm35 as a temp. controle as an example.

 

[mg_designs]

use amagic number to calibrate your results
which will helps u to have one bit change accuray

 

[msnaggar]

pls could you explain it more
thanks

 

[roykyn]

use a capacitor in parallel to stabilize the voltage....

 

[ldanielrosa]

Could you expand your question please? So far it looks like you are trying to get 0.1% accuracy readings from a 5% tolerant layout.

 

[msnaggar]

i use .1 uf tantalum capacitor and see the o/p on 15Mhz osc and havn't any noise

 

[ldanielrosa]

On what and from what? The less you say the less we can help you.