prateek_k_chd
Member level 5
I plan to use Vref+ & Vref- of the ADC of 16F877A. The voltages for these come from a potential divider and hence are high impedance.
So,will placing a 0.1 uF cap on their pins (to store charge) be enough for the ADC? Or do I need to buffer these voltages first ?
PIc's DS says the ADC cap is about 120pF.So I'm guessing the cap could do. But it would be great if anyone can speak from experience !
Thanks a lot !!
So,will placing a 0.1 uF cap on their pins (to store charge) be enough for the ADC? Or do I need to buffer these voltages first ?
PIc's DS says the ADC cap is about 120pF.So I'm guessing the cap could do. But it would be great if anyone can speak from experience !
Thanks a lot !!