Hello guys,
I want to amplify the small DC signal that produced by O2 sensor. So, it can be read by Arduino. But the problem is, I unable to amplify the signal because the original circuit are using AD8572 Op-Amp which is SMD type. So, I change it to OP07CP which I find it's equivalent to AD8572.
There's some changes are made.
1. Change the Op-Amp from AD8572 to OP07CP.
2. Change -ve voltage (pin 4) to Arduino GND.
3. The input voltage are taken from Arduino 5V pin.
Attached is the OP07CP, AD8572 datasheet, original circuit and new circuit.
http://www.ti.com/lit/ds/symlink/op07c.pdf [OP07CP datasheet]
http://www.analog.com/media/en/technical-documentation/data-sheets/AD8571_8572_8574.pdf [AD8572 datasheet]
[OP07CP Circuit]
[AD8572 Circuit]