Has anyone used the MC2-CO-14 carbon monoxide sensor? I have a question.

工藤新一Yang

Has anyone used the MC2-CO-14 carbon monoxide sensor? I have a question. [Copy link]

I would like to ask if anyone has used MC2-CO-14. The test circuit in the data sheet is as follows:

Is
this an operational amplifier circuit? How many times is it amplified? ! ! ? Can SIOUT be directly connected to the ADC pin for analog-to-digital conversion? Thank you

threetigher

How's your research going?

xiaxingxing

Isn't this a current-to-voltage circuit? The current signal from the sensor is converted into a voltage output with an amplification factor of (R1//RT1+R2)//Rc1.

What is the function of resistor R4? I don't understand.