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adc 16F877a

 
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barikjk



Joined: 08 Dec 2012
Posts: 5

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adc 16F877a
PostPosted: Thu Oct 31, 2013 3:46 am     Reply with quote
Hello friends
I want to know if it is possible to use internal reference voltage(Vref+) for ADC of 2.048V for pic16F877a and Vref-=0? is there any code ?

Thanks
Ttelmah



Joined: 11 Mar 2010
Posts: 19538

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PostPosted: Thu Oct 31, 2013 4:13 am     Reply with quote
No.

The voltage reference, does not have enough output drive capability to drive the ADC. The ADC requires a reference able to deliver 150uA.

It is designed for use with the comparator.

This is why it is called the _comparator_ voltage reference.....

Best Wishes
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