Any AD converter IC suggests ?

J

Jimsbon

Guest
just for general purpose, no need too expensive.

thanks for help.

--
 
"Jimsbon" <ioruwe@eiwor.com> wrote in message news:342bd2F448nrhU1@individual.net...
just for general purpose, no need too expensive.
Click to expand...
The LM393 would be an inexpensive A/D. If you want
more bits, any particular speed, or a digital interface of
any certain kind, you will need to state your requirements.

--
--Larry Brasfield
email: donotspam_larry_brasfield@hotmail.com
Above views may belong only to me.
 
Jimsbon wrote:
just for general purpose, no need too expensive.
Click to expand...

General is a bit broad ...
Have a look at the datasheets and pricelists of the
manufacturers yourself. They don't produce overpriced
junk, usually.

Rene
 
Jimsbon <ioruwe@eiwor.com> wrote:
just for general purpose, no need too expensive.
Click to expand...
http://www.maxim-ic.com/
Selector, guideline cost displayed, ease of getting samples.
 
Larry Brasfield wrote:
The LM393 would be an inexpensive A/D. If you want
Click to expand...
http://www.national.com/pf/LM/LM393.html

Are you sure ????
 
hamilton wrote:
Larry Brasfield wrote:



The LM393 would be an inexpensive A/D. If you want


http://www.national.com/pf/LM/LM393.html

Are you sure ????
Click to expand...
Absolutely. High speed, two bit parallel A/D.
 
Frank Bemelman wrote:
"Rob Gaddi" <rgaddi@bcm.YUMMYSPAMtmc.edu> schreef in bericht
news:crh71q$ior@gazette.corp.bcm.tmc.edu...

hamilton wrote:


Larry Brasfield wrote:



The LM393 would be an inexpensive A/D. If you want


http://www.national.com/pf/LM/LM393.html

Are you sure ????

Absolutely. High speed, two bit parallel A/D.


Two bit or one bit?
Click to expand...
Two with a bit of resistor trickery. One of the comparators references
against a resisitor divider to VCC/2. The other references to a second
equal resistor divider, but also has a resistor over to the output of
the first comparator, such that when the first output is high the
reference is 3/4 VCC, and when it's low it's 1/4 VCC.

*looks over back of envelope again* At least, I think it should work.
 
On Wed, 05 Jan 2005 09:19:56 -0700, hamilton wrote:

Larry Brasfield wrote:


The LM393 would be an inexpensive A/D. If you want

http://www.national.com/pf/LM/LM393.html

Are you sure ????
Click to expand...
I think he was being facetious. It's a comparator, which will give you one
bit of analog to digital conversion. If the signal is less than the
reference, the output is 0. If the signal is higher than the reference,
the output is 1.

The point was, we need much more information, i.e., a much more rigorous
specification as to the requirements.

Here's a quick search link:
http://www.google.com/search?q=adc+chips&btnG=Search

Good Luck!
Rich
 
Frank Bemelman wrote:

"Rob Gaddi" <rgaddi@bcm.YUMMYSPAMtmc.edu> schreef in bericht
news:crh71q$ior@gazette.corp.bcm.tmc.edu...

hamilton wrote:


Larry Brasfield wrote:



The LM393 would be an inexpensive A/D. If you want


http://www.national.com/pf/LM/LM393.html

Are you sure ????

Absolutely. High speed, two bit parallel A/D.


Two bit or one bit?

Avnet lists the Fairchild LM393 at $0.125, which is one bit -- but the
Click to expand...
ST Microelectronics version is a quarter. So you could say it's either
a one-bit part or a two-bit part, depending on where you get it.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
 
In article <342bd2F448nrhU1@individual.net>, Jimsbon <ioruwe@eiwor.com> wrote:
just for general purpose, no need too expensive.
Click to expand...
Linear makes some that are in the "not too expensive" range. They aren't
exactly cheap though.

There is one built into some of the PIC and Cygnal micros. If you need an
ADC and a micro this is worth looking at.


--
--
kensmith@rahul.net forging knowledge
 
On Thu, 06 Jan 2005 01:35:40 +0000, Ken Smith wrote:

In article <342bd2F448nrhU1@individual.net>, Jimsbon <ioruwe@eiwor.com> wrote:
just for general purpose, no need too expensive.

Linear makes some that are in the "not too expensive" range. They aren't
exactly cheap though.

There is one built into some of the PIC and Cygnal micros. If you need an
ADC and a micro this is worth looking at.

http://focus.ti.com/docs/prod/folders/print/tlc548.html
Click to expand...

Have Fun!
Rich
 
Rich Grise wrote:
On Wed, 05 Jan 2005 09:19:56 -0700, hamilton wrote:



Larry Brasfield wrote:


The LM393 would be an inexpensive A/D. If you want

http://www.national.com/pf/LM/LM393.html

Are you sure ????

I think he was being facetious. It's a comparator, which will give
you one
bit of analog to digital conversion. If the signal is less than the
reference, the output is 0. If the signal is higher than the
reference,
the output is 1.

The point was, we need much more information, i.e., a much more
rigorous
specification as to the requirements.

snip
Click to expand...

How about a voltage controlled PWM? makes a 1 bit ADC, sample as many
times as required for the resolution required? (made using a LF347? or
LM324)

Makes for easy opto-isolation (of which I'm a Big fan...)

Alan
 
"Rob Gaddi" <rgaddi@bcm.YUMMYSPAMtmc.edu> schreef in bericht
news:crh71q$ior@gazette.corp.bcm.tmc.edu...
hamilton wrote:


Larry Brasfield wrote:



The LM393 would be an inexpensive A/D. If you want


http://www.national.com/pf/LM/LM393.html

Are you sure ????

Absolutely. High speed, two bit parallel A/D.
Click to expand...
Two bit or one bit?

--
Thanks, Frank.
(remove 'q' and 'invalid' when replying by email)
 
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