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miksi  
#1 Posted : Monday, June 30, 2014 6:03:44 PM(UTC)
miksi

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Well, I've just discovered ripple on 3.3V AVCC dual module (not the latest 3.5V) and this ripple is about 400 mVpp on both channels and frequency is about 274KHz. I wouldn't call it normal behavior. What should I do?

AVCC ripple
musicman  
#2 Posted : Monday, June 30, 2014 6:45:03 PM(UTC)
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Buy the latest version AVCC module.
Brian Donegan  
#3 Posted : Monday, June 30, 2014 7:28:56 PM(UTC)
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thanks 1 user thanked Brian Donegan for this useful post.
miksi on 6/30/2014(UTC)
miksi  
#4 Posted : Monday, June 30, 2014 11:50:05 PM(UTC)
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OMG, I was really dissatisfied with the sound of the Buffalo III, it was thin, edgy, harsh, rude, unlistenable actually and I thought something is fundamentally wrong either with my Buffalo setup, or my system as a whole but I would never expect that dual AVCC module can be a culprit with these oscillationsBrick wall. I had no desire to listen to music at all, sometimes for several weeks(months) at least on my system.
Last winter I removed Crystek 100MHz clock and went to synchronous road with Acko's pcbs but to no avail. I mean everything worked from the start but the sound was still unbearable.
I have the scope from the last November but it never occurred to me to probe the little buggers.Brick wall Brick wall Brick wall

And now, it's a long night ahead of me.
musicman  
#5 Posted : Monday, November 24, 2014 8:01:10 PM(UTC)
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I am not shure if I have the latest version of the AVCC module. I ordered my second BIIIse in May this year ( with Tridents and AVCC ).

Brian ? Anyone ?
LeonvB  
#6 Posted : Monday, November 24, 2014 8:47:30 PM(UTC)
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I'm quite sure it's the previous version. Brian just posted on the diyaudio forum that the new version is now readily available.
Brian Donegan  
#7 Posted : Monday, November 24, 2014 10:08:00 PM(UTC)
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One SOIC-8 package -> Older version
Two SOIC-8 packaes -> Newest version

I have actually been shipping the new version for several weeks, but not all the way back to May :)

Edited by user Monday, November 24, 2014 10:08:44 PM(UTC)  | Reason: Not specified

musicman  
#8 Posted : Tuesday, November 25, 2014 5:12:57 AM(UTC)
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Thx

An order is on your way.
fred_com  
#9 Posted : Tuesday, November 25, 2014 3:26:57 PM(UTC)
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Hi Brian,

sorry for being overcautious.
If I'll order AVCC from Trident page now, I'll get AVCC new version - v3 or something (not v2.1 as it is now on Trident page)?

Thanks,
Fedor
musicman  
#10 Posted : Tuesday, November 25, 2014 6:19:06 PM(UTC)
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Quote:
Originally Posted by BrianDonegan
Yes. One version at a time [helps] keeps me sane
thanks 1 user thanked musicman for this useful post.
fred_com on 11/26/2014(UTC)
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