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ybserge 2nd January 2007 10:48 AM

A digitally controlled volume control solution
Hi, guys
Perhaps, it is worth being looked at what I found recently.
Haven't tried yet, but looks promising. Any thoughts?

gootee 2nd January 2007 04:25 PM


In case you're interested, here are some sources for more information about using digital potentiometers:

Some interesting points about using digital pots for audio attenuators are covered in Application Note 161 (related to the DS1802), at . You might also be interested in some of their other digital pot appnotes, such as 864, 803, and 3417, and maybe also 2095, 1956, and 838. A list of links to Maxim's digital pot appnotes is at .

And has appnote 1145, which contains many different application schematics with digital potentiometers.

There are also some ideas in a White Paper, from Dec 2000, by Wolfson Microelectronics Ltd, which also discusses their WM8816 stereo volume control IC. Sorry, I don't have a link; just the PDF.

The datasheets for the Analog Devices AD5227 and AD5220 (and probably others) also have quite a bit of applications information (at

I also have an appnote from, about the DS1669, that appears to have some possibly-interesting information.

And, at (Electronic Design News magazine), I have, in the past, found several articles about digital pots, including one about using inexpensive relays to build a digital pot.

Many other semiconductor manufacturers' websites also have some good appnotes about digital pots.

- Tom Gootee

ybserge 4th January 2007 09:31 PM

Thanks, Tom!

Though I'm quite familiar with the most material you mentioned
Intersil's appnote 1145 came news to me.
Tnks again

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