Instumentation amps
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Posts: 46,084
If I am using an 8 channel A/D, what what be a good choice for my amplifiers as
far as hardware goes? I am going to have several transducers and probes hooked
to this a/d, and am looking for ic's for my amplifier stage. Do they make , say
a 2 4 or 8 channel instrumentaion amp or would I need 8 independent ones?
[noparse][[/noparse]Non-text portions of this message have been removed]
far as hardware goes? I am going to have several transducers and probes hooked
to this a/d, and am looking for ic's for my amplifier stage. Do they make , say
a 2 4 or 8 channel instrumentaion amp or would I need 8 independent ones?
[noparse][[/noparse]Non-text portions of this message have been removed]
Comments
one with 2 multiplexers on the inputs, one for the + inputs and another
for the - inputs. I'm not aware of any chips with multiple
instrumentation amps.
Dennis
Original Message
From: Ricky Konvicka [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=-7a7eI7BoVNPpVdxv4398ZbnaI6dzGk-FFXqEfwOBOAIXbnXwueJqPuhB4g7kJ29czXFYrXze_o_vNZcK53IdA]ricky@m...[/url
Sent: Thursday, December 13, 2001 8:51 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Instumentation amps
If I am using an 8 channel A/D, what what be a good choice for my
amplifiers as far as hardware goes? I am going to have several
transducers and probes hooked to this a/d, and am looking for ic's for
my amplifier stage. Do they make , say a 2 4 or 8 channel
instrumentaion amp or would I need 8 independent ones?
[noparse][[/noparse]Non-text portions of this message have been removed]
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> Use either 8 independent ones, or if your design warrants it, use only
> one with 2 multiplexers on the inputs, one for the + inputs and another
> for the - inputs. I'm not aware of any chips with multiple
> instrumentation amps.
I ahve used the BurrBrown MPC507 with great success. It's an 8x1 balanced MUX.
Buffered properly it's basically a straight wire. $12 or so, 3 bit address
control, and available today from digikey.
-dave
Oh yes I'll see you, see you on the other side.... -Ozzy
dave paton http://www.dpaton.net dave at ieee dot org
wile ago. The one I used was the 2141 which has set gains (10, 100 I
think). They had at least one more with variable gain set by resistor.
Original Message
From: Dave Paton [noparse]/noparse]SMTP:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=yCc7c0DjhH9ou_G2oJIkB0BclEsk6UZSLU-ZMB-MoecxQ0rQg4dRh1BLp1auIbz-0eqRW1y0j_w]dave@d...[/url
Sent: Thursday, December 13, 2001 1:17 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Instumentation amps
On 12/13/01 at 10:05 AM, doleary@h... (Dennis P. O'Leary)
wrote:
> Use either 8 independent ones, or if your design warrants it, use
only
> one with 2 multiplexers on the inputs, one for the + inputs and
another
> for the - inputs. I'm not aware of any chips with multiple
> instrumentation amps.
I ahve used the BurrBrown MPC507 with great success. It's an 8x1
balanced MUX.
Buffered properly it's basically a straight wire. $12 or so, 3 bit
address
control, and available today from digikey.
-dave
Oh yes I'll see you, see you on the other side.... -Ozzy
dave paton http://www.dpaton.net dave at ieee dot
org
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