Hi
I'm using the TLC277 with a Electrochemical Gas Sensor
http://www.e2v.com/assets/media/files/sensors_datasheets/Electrochem/EC_Application_Note_AN2.pdf
The circuit using is :
I use battery 5V for the OAP , and the V-Ref is 2.5 v, the Output Signal to the sensor is 1.20 ± 0.25 μA/ppm
The values obtained of the equation are very different.
Equation:
Vo = (Vref-Vi)*(Gain)-Vref
Questions:
The circuit is ok?
this amp (tlc277) is not for this circuit?
the equation is ok?
so what is wrong??
Regards
JUAN