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May 22, 2013, 09:06:03 pm
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iyahdub
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DAC0800
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on:
May 17, 2012, 09:37:49 pm »
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Anyone out there has any experience with a DAC0800. I bought it just to start doing some experiments, as i use arduino to some sound generation of sorts, so if anyone can give me some guiding lights,id apreciate ( Links, projects, even if not related that use the DAC0800, etc)
Thanks in advance !!
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Runaway Pancake
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Re: DAC0800
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Reply #1 on:
May 17, 2012, 10:15:21 pm »
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I've used DAC0808, it's current out, too, but not differential. Add a
transconductance
transimpedance
amp
1
(
I-to-V
converter) and you have 0-5V in 256 steps,
a lot
fewer support components than shown
2
for the '0800.
1
http://i270.photobucket.com/albums/jj118/new_clear_days/IN13/DAC_bargraph.jpg
2
http://www.datasheetdir.com/Single-Supply-Operation-Of-The-Dac0800-And-Dac0802+Application-Notes
correction 18 May
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Last Edit: May 18, 2012, 04:10:45 pm by Runaway Pancake
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iyahdub
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Re: DAC0800
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Reply #2 on:
May 17, 2012, 11:06:34 pm »
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Do you mind elaborating on that OTA use ?!?
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Runaway Pancake
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Re: DAC0800
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Reply #3 on:
May 18, 2012, 04:09:14 pm »
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Oops -
transimpedance
,
not
transconductance; it
is
current to voltage.
The DAC's output is current, but only in/to a low resistance load. The opamp's output voltage is directly proportional to the current in, with gain. So with that pot you can tweak the output a bit. It requires a -5V rail.
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iyahdub
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Re: DAC0800
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Reply #4 on:
May 18, 2012, 04:33:20 pm »
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Yeah makes sense now. Not the kinda thing really wanted for arduino , tbh. Ill leave it to another project.
Just ordered a MCP4725
http://proto-pic.co.uk/breakout-board-for-mcp4725-i2c-dac/
.
Thanks for your help anyway
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Runaway Pancake
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Re: DAC0800
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May 18, 2012, 06:43:00 pm »
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Yes, the DAC08s are bygone tech.
Those are pretty neat little devices you linked.
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