Other Parts Discussed in Thread: OPA2196, , OPA2180, LM393, LM358, TL072
I am experimenting some functionalities based on schmitt trigger made using TL082. Ive put non inverting voltage as 2.04V and voltage at inverting input is variable. I can see the output toggles when input is 1.92V and not 2.04V. In my experiment it should atleast cut off at 2.0V - 2.02 range if not 2.04V. Can someone tell what can be the possible issues in it? Also if this IC is not suitable for Schmitt trigger application can you guys suggest some IC. I have found OPA2196 and OPA2180 but these two are out of stock on TI.
I am sharing the circuit below.
The resistor R17 is passed through some current and schmitt trigger will measure voltage accross R17 which is also its input voltage. The Opamp is working at 20V unipolar supply and the upper threshold voltage is set at 2.04V(measured on non inverting input of opamp) as per multimeter.