8 Bit DAC

J

jay

Guest
Hi Folks,

I need an 8 bit DAC that runs freely (no control lines required...just input
parallel data and convert) and can output a 0 to 12V level. Presently the
AD7224 I am considering outputs a 0 to 10V out. I guess I would need a
voltage amplifier but that requires some more components (which leads to
more failure possibilities) and I need to keep the area on the PCB to a
minimum.

Any suggestions?

Thanks
Jay
 
"jay" <pcb4u@earthlink.net> wrote in message
news:clqtc7$8gk$1@gateway.northropgrumman.com...
Hi Folks,

I need an 8 bit DAC that runs freely (no control lines required...just
input
parallel data and convert) and can output a 0 to 12V level. Presently the
AD7224 I am considering outputs a 0 to 10V out. I guess I would need a
voltage amplifier but that requires some more components (which leads to
more failure possibilities) and I need to keep the area on the PCB to a
minimum.

Any suggestions?
Click to expand...
R2-R ladder network and an op-amp?
 
"Charles Schuler" wrote:

"jay" <pcb4u@earthlink.net> wrote in message
news:clqtc7$8gk$1@gateway.northropgrumman.com...
Hi Folks,

I need an 8 bit DAC that runs freely (no control lines required...just
input
parallel data and convert) and can output a 0 to 12V level. Presently the
AD7224 I am considering outputs a 0 to 10V out. I guess I would need a
voltage amplifier but that requires some more components (which leads to
more failure possibilities) and I need to keep the area on the PCB to a
minimum.

Any suggestions?

R2-R ladder network and an op-amp?
Click to expand...
That's three times he's had the same answer to the same question from three
different people. Perhaps he's waiting for a private email. In which case he'll
be lucky.

Gibbo
 
That's three times he's had the same answer to the same question from
three
different people. Perhaps he's waiting for a private email. In which case
he'll
be lucky.

Gibbo
Click to expand...
Did not know that. Oh well, it's always my policy to help if I can. I
never email responses, however. Cheers.
 
Charles Schuler wrote:
That's three times he's had the same answer to the same question
from three different people. Perhaps he's waiting for a private
email. In which case he'll be lucky.

Did not know that. Oh well, it's always my policy to help if I can.
I never email responses, however. Cheers.
Click to expand...
Wise policy.

_Why you shouldn't ask for E-mail responses on Usenet:_
http://www.cs.tut.fi/~jkorpela/usenet/mail-responses.html
 
_Why you shouldn't ask for E-mail responses on Usenet:_
http://www.cs.tut.fi/~jkorpela/usenet/mail-responses.html
Click to expand...
Got a kick out of this: Most of the advice given on Usenet is wrong.

Good reference ... thanks!
 
On Thu, 28 Oct 2004 22:16:41 -0700, Max Hauser wrote:

"Guy Macon" in news:10o2oa8djgasjb8@corp.supernews.com...
. . .
_Why you shouldn't ask for E-mail responses on Usenet:_
http://www.cs.tut.fi/~jkorpela/usenet/mail-responses.html

There's further irony in this. First, for a couple of decades the
netiquette guidelines (later RFC1855) cautioned people not to post, when
email would do the job. (Limited interest, etc.) Just as the guidelines
cautioned people to _include_ some of the posting you are responding to
(because of the Time Warp, which is no longer a problem, or even part of the
memory of newbies), yet NOW they take the advice to heart, and unnecessarily
include 100's of lines of original.

Also, thought the Web page cited above does make the point, advice on
limitations of Usenet information predates Web pages. Here is a pure-Usenet
example that I happen to know about:

http://tinyurl.com/3o852
Click to expand...
OK, I never took a DSP course. At the end of the article, he essentially
says, "All of these answers are wrong", but then gives no indication what
the right answer might be.

Does anybody really know?

Thanks,
Rich
 
"Rich Grise" in news:pan.2004.10.29.15.54.30.910700@example.net...
http://tinyurl.com/3o852

OK, I never took a DSP course. At the end of the article, he
essentially says, "All of these answers are wrong", but then
gives no indication what the right answer might be.

Does anybody really know?
Click to expand...
Sorry about that. I posted three articles on this in 1991 and the third
one, 6-June, which addressed that question, does not show up in the same
thread. Here it is:

http://tinyurl.com/4kfch


(PS - No need to address me in third person!) -- Max
 
On Fri, 29 Oct 2004 16:49:12 +0000, Max Hauser wrote:

"Rich Grise" in news:pan.2004.10.29.15.54.30.910700@example.net...

http://tinyurl.com/3o852

OK, I never took a DSP course. At the end of the article, he essentially
says, "All of these answers are wrong", but then gives no indication
what the right answer might be.

Does anybody really know?


Sorry about that. I posted three articles on this in 1991 and the third
one, 6-June, which addressed that question, does not show up in the same
thread. Here it is:

http://tinyurl.com/4kfch


(PS - No need to address me in third person!) -- Max
Click to expand...
Sorry for that - I had ass-u-me-d that you had cited somebody else.

Thanks!
Rich
 
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