- Thermopile Detector Voltage Amplification Module
- Posted by arslan on June 3rd, 2008
I am working with a thermopile detector from Dexter
Now the problem I am having is that the output of the detector is in th
range of microvolts and it needs to be amplified to 3.3V
I am using 4 tlc2652 opamps (in first stage) and an opa4277 quad opamp i
the second stage. The opamps are in noninverting mode. Capacitors are als
attached for filteration.
Now I am having a lot of trouble with the circuit and therefore I wa
looking for an of the shelf amplification and filteration module offerin
amplification from microvolts to round about 5V. Are there an
manufacturers developing such modules for sensors.
- Posted by Rene Tschaggelar on June 28th, 2008
arslan wrote:
That won't help much if applied improperly.
You need an amplifier with extremely low offset,
sometimes they atre called zero-drift OpAmp.
Such as the LT2053, an RRIO. It can do this in
one step basically. The layout is critical.
Rene
--
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net
- Posted by CBFalconer on June 29th, 2008
Rene Tschaggelar wrote:
Look at the circuit in Electronic Engineering Times, 2008-06-08,
p33. It can handle DC with low offset, or easily be altered for a
high pass filter. The offset adjustment doesn't affect the gain,
which depends on one resistor. The remaining 6 resistors are
identical, and require matching.
--
[mail]: Chuck F (cbfalconer at maineline dot net)
[page]: <http://cbfalconer.home.att.net>
Try the download section.
