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kender
Joined: 09 Aug 2004 Posts: 768 Location: Silicon Valley
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[OT] Digitally programmable audio tone generator chip |
Posted: Sat Aug 29, 2009 1:57 pm |
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Colleagues,
Are there programmable tone generator ICs out there? It would have a digital interface to a microcontroller (e.g. I2C). Through this interface the controller could set a tone and volume. The output would go to a fixed-gain audio amp and then to a speaker, or may be the tone generator IC would have an amplifier on board.
The closes thing I was able to find is this: http://www.keterex.com/pubs/kx1400ds.pdf . The tone generator is a part of an audio playback chip. May be there are other audio codec type chips that have tone generators and volume control…
Any suggestion (aside from obvious) or insight is appreciated!
- Nick _________________ Read the label, before opening a can of worms.
Last edited by kender on Sun Aug 30, 2009 12:21 am; edited 1 time in total |
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mbradley
Joined: 11 Jul 2009 Posts: 118 Location: California, USA
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asmboy
Joined: 20 Nov 2007 Posts: 2128 Location: albany ny
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Posted: Mon Aug 31, 2009 4:49 pm |
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killer part - i use it all the time - in several hi end products.
Makes 10 bit quality hi purity sine, and tri wave with ultra stable amplitude, super low distortion - all harmonics down at least 55 db etc.
Justs need 5v dc and produces .2v RMS.
Covers very wide bandwidth ( depending on xtal) with fractional hz accuracy and resolution - up to 25 mhz.
Cheaper and simpler to program than the 3385 - its
analog devices ad9833 DDS /DNO. |
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bkamen
Joined: 07 Jan 2004 Posts: 1611 Location: Central Illinois, USA
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Posted: Thu Sep 03, 2009 11:03 pm |
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Analog makes nice DDS chips...
-Ben _________________ Dazed and confused? I don't think so. Just "plain lost" will do. :D |
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