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Old 9th January 2011, 11:47 PM   #1
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Default Cheap volume control chip

Saw this little guy in my new parts express mag:

Sure Rotary Encoder Board + Volume Control Board |

So its a chip volume attenuator that uses a single supply. In theory you could adjust vcc so that there is zero dc offset depending if your amps input sits at 2.5v like a tripath amp.

This could be nice for just 10 bucks and i would think couldnt be any worse then my $15 smt stepped attenuators from ebay.
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Old 9th January 2011, 11:54 PM   #2
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Originally Posted by nightanole View Post
This could be nice for just 10 bucks and i would think couldnt be any worse then my $15 smt stepped attenuators from ebay.
I think it could be a lot worse than a $15 stepped attenuator.

Still a great bargain, though I would personally only use it for a lo-fi application like portable audio.
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Old 10th January 2011, 12:23 AM   #3
tomchr is offline tomchr  Canada
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I can't tell which volume control chip they're using. I have excellent results with the TI PGA2320.

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Old 10th January 2011, 12:53 AM   #4
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This is a M62429. its alittle diff animal. It uses a single supply and doesnt have a gain function like the pga's. Still i wonder why then dont include the input impedance or max load in the data sheet.
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