[OT] Digitally programmable audio tone generator chip

[kender]

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
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Read the label, before opening a can of worms.

[mbradley]

This unit has 1Hz to 25MHz

Just run it through a digital pot, then to an LM386 (I think thats the audio amp chip) and you can drive a speaker directly

http://www.sparkfun.com/commerce/product_info.php?products_id=9169

[asmboy]

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.

[bkamen]

Analog makes nice DDS chips...

-Ben
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Dazed and confused? I don't think so. Just "plain lost" will do. :D