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Topic: DAC0800 (Read 2810 times) previous topic - next topic

iyahdub

Bless.
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 !!
10 LET Loop=Infinite
20 GO TO 10

Runaway Pancake

#1
May 18, 2012, 05:15 am Last Edit: May 18, 2012, 11:10 pm by Runaway Pancake Reason: 1
I've used DAC0808, it's current out, too, but not differential.  Add a transconductance transimpedance amp1 (I-to-V converter) and you have 0-5V in 256 steps, a lot fewer support components than shown2 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
"Hello, I must be going..."
"You gotta fight -- for your right -- to party!"
Don't react - Read.
"Who is like unto the beast? who is able to make war with him?"

iyahdub

Do you mind elaborating on that OTA use ?!?
10 LET Loop=Infinite
20 GO TO 10

Runaway Pancake

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.
"Hello, I must be going..."
"You gotta fight -- for your right -- to party!"
Don't react - Read.
"Who is like unto the beast? who is able to make war with him?"

iyahdub

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
10 LET Loop=Infinite
20 GO TO 10

Runaway Pancake

Yes, the DAC08s are bygone tech.

Those are pretty neat little devices you linked.
"Hello, I must be going..."
"You gotta fight -- for your right -- to party!"
Don't react - Read.
"Who is like unto the beast? who is able to make war with him?"

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