question about AVCC input lowpass filter
Posted: Mon Feb 18, 2008 8:23 pmAccording to schematics (http://www.megadrum.info/img/megadrum32.png) MD AVCC π filter resonance frequency is 11kHz and impedance is 140Ω. In Atmel application note there is LC filter with cut frequency at 500kHz and impedance 3Ω (1mH coil vs 1µH). Is there a particular reason for this change? Because I could simply wind 1µH coil for myself (in the end it's "do it yourself" project :)
