piclist 2003\05\09\111454a >
Thread: Decoupling Aref when using AVcc on ADC
face BY : Dave VanHorn email (remove spam text)

At 08:17 AM 5/9/2003 -0700, John Pearson wrote:
>Refering to the MEGA8 ADC reference voltage, two sources mention
>decoupling Aref pin with a capacitor when using AVcc as the voltage reference.
>I am unable to find what capacitor value or how to install.

That's because it's up to you, and the right answer depends on your system

>So can I assume I use a .1uF mono tant. between AVcc and ground?

I also put a 10 ohm resistor in series with AVCC, and a local bypass there.

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In reply to: <000c01c3163e$1e96f960$11313fd1@xero>
See also: www.piclist.com/techref/io/atod.htm?key=adc
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