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24th August 2009, 12:22 AM
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#1 |
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diyAudio Member
Join Date: Jan 2007
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Opamp for Vref on TDA1543, TDA1545A
Looking for info, comments, or even schematics (topologies) on generating a clean Vref -- via a dedicated opamp --for TDA1543 and TDA1545 (and preferably the latter).
Informally, I've heard (read) some DIYers mention this strategy, but I'm not sure if it has been formally discussed in a forum, at least via my non-exhaustive archive searches -- please correct me if I'm wrong! Thx |
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24th August 2009, 09:26 AM
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#2 |
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diyAudio Member
Join Date: Jan 2007
Location: Cheltenham
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Have you seen the 'Lossless SD Player' thread? It uses a led-referenced shunt reg though, not an op-amp.
http://www.diyaudio.com/forums/showt...ic#post1857369 http://www.diyaudio.com/forums/showt...es#post1868380 |
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24th August 2009, 10:10 AM
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#3 |
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diyAudio Member
Join Date: Jan 2007
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Ooops! Iref (TDA1545A) vs Vref (TDA1543)
I just noticed a potentially huge oversight on my part (shame on me!)...
TDA1545A (pin 7): Iref (not Vref) TDA1543A (pin 7): Vref This may change the relevance of the thread query. Last edited by hollowman; 24th August 2009 at 12:39 PM. |
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