OpAmp circuit for ME3 - ETO Sensor (HELP)

Status
Not open for further replies.
1

13vdc

Newbie level 2
Joined
Sep 2, 2015
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
19
Hello!

I want to make a circuit for a ME3 - ETO Sensor that I will connect with a microntroller. I read the sensor's datasheet but I don't know if I will be using proper parts.

Can I use the famous IC741 opamp? The one labeled V- , is that V+? What would be a the best value for Vref? (my microcontroller has 5V logic levels) And the capacitor 0u1, I can't understand what it means.

The sensor is a bit costly so I'm afraid to do some trial and error.

TIA for the advice!

 

Before choosing which op amp to use, its purpose in the circuit needs to be defined.
The best value for Vref would probably be found after some testing of the unit, however the bias point is something to consider when determining this.
the capacitor value is probably 0.1 microfarads.
Hope this isnt too Captain Obvious
 
Reactions: 13vdc

    1

    13vdc

    Points: 2
    Helpful Answer Positive Rating
Can I use the famous IC741 opamp? The one labeled V- , is that V+? What would be a the best value for Vref?
Click to expand...
I presume, the bias voltage polarity is meaned as shown in the schematic. It has been BTW copied from a competitor's application note :grin:

The voltage level is specified with 300 mV, sensor referred. This popular potentiostat circuit needs a dual voltage supply, and could work with LM741. Considering the fact that the circuit should be permanently (battery) powered to avoid long equilibration periods after starting the instrument, you'll preferably use a micropower OP.
 
Reactions: 13vdc

    1

    13vdc

    Points: 2
    Helpful Answer Positive Rating

Thank you. Sorry for being a noob with capacitor markings.


So I had bought an another china copy :-D. I'm planning to simulate it first. I'll look tomorrow in my bin for the other parts.

Thank you again to both of you.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…