Loading...
Pages: [1]   Go Down
Author Topic: DAC0800  (Read 1245 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Sr. Member
****
Karma: 0
Posts: 302
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

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 !!
Logged

10 LET Loop=Infinite
20 GO TO 10

Offline Offline
Edison Member
*
Karma: 23
Posts: 1377
Now, More Than Ever
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

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
« Last Edit: May 18, 2012, 04:10:45 pm by Runaway Pancake » Logged

Don't Be Upset By The Results You Didn't Get With The Work You Didn't Do

Offline Offline
Sr. Member
****
Karma: 0
Posts: 302
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Do you mind elaborating on that OTA use ?!?
Logged

10 LET Loop=Infinite
20 GO TO 10

Offline Offline
Edison Member
*
Karma: 23
Posts: 1377
Now, More Than Ever
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

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.
Logged

Don't Be Upset By The Results You Didn't Get With The Work You Didn't Do

Offline Offline
Sr. Member
****
Karma: 0
Posts: 302
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

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
Logged

10 LET Loop=Infinite
20 GO TO 10

Offline Offline
Edison Member
*
Karma: 23
Posts: 1377
Now, More Than Ever
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Yes, the DAC08s are bygone tech.

Those are pretty neat little devices you linked.
Logged

Don't Be Upset By The Results You Didn't Get With The Work You Didn't Do

Pages: [1]   Go Up
Print
 
Jump to: