AVR-Chat

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-----Original Message-----
From: "Don Kinzer" <dkinzer@easystreet.net>

Date: Mon, 27 Oct 2008 15:15:01 
To: <AVR-Chat@yahoogroups.com>
Subject: [AVR-Chat] Re: Inductor at AVCC


--- In AVR-Chat@yahoogroups.com, "Enki" <enkitec@...> wrote:
>The current at that pin seems to be below 500uA, so a 10Ohm
>inductor (DC resistance) doesn't drop the voltage so much.
Keep in mind that the AVcc pin provides all of the source current for 
the digital outputs that are on the same pins as the analog inputs as 
well as for the digital and analog input circuitry.  Although the AVcc 
current in your application might be less than 500uA, it could be much 
higher in general, perhaps several several tens to a 100 milliamps.  
At that level, 100 ohms is quite significant.

Don Kinzer
ZBasic Microcontrollers
http://www.zbasic.net





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