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Old 28th April 2012, 08:31 AM   #1
Kamuy is offline Kamuy  United States
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Default MAX13330 Headphone Amp

This is my first attempt at trying to make my own headphone amp based on information in datasheets alone. I'm not sure if this schematic is correct, or what could be added/removed to improve it, specifically dealing with virtual grounds.

The LM386 and summer are for a visualizer I'm planning to build into the amp.

Here is the datasheet for the MAX13330: http://datasheets.maxim-ic.com/en/ds...0-MAX13331.pdf

Advice? Opinions?
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Old 18th May 2012, 03:00 AM   #2
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Hey Kamuy,

'looks like a neat project! I thought at first that U2 might clip on the negative side, but looking quickly at the datasheet for the lm386 it seems it self-aligns the output between the rails, is that right? Pretty cool little chip.

What kind of display were you thinking of making? Keep up the good work!

Jim
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Old 20th May 2012, 08:15 AM   #3
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Quote:
Originally Posted by J.R.Freeman View Post
I thought at first that U2 might clip on the negative side, but looking quickly at the datasheet for the lm386 it seems it self-aligns the output between the rails, is that right? Pretty cool little chip.
It's pretty much a requirement for any chip that does not generate its own negative supply, otherwise you wouldn't get any kind of decent output amplitude. If you're interested in how that works, I've looked at it here.

The venerable LM386 should be good enough for driving a viz.
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