I got a bunch of LM358 ICs to experiment with op amps and see how they behave in real life. I have learned a lot about them but have not done too much with them in real life. I have been able to successfully use it as an amplifier and comparator.
I set it up so there was a current shunt being amplified and compared to a potentiometer. It is going to be a short circuit protection board. By ading a mosfet with gate resistor, controlled by the output of the comparator, I made an oscillator. While it was on a breadboard and the mosfet only had a gate resistor, it only oscillated at 44kHz.
So that go me wondering. What’s the maximum frequency it is recommended you use the LM358 at for good operation? I am looking for a rule of thumb type of thing, I know it can vary. Can you use it to compare or amplify a variable shunt voltage being switched at a few 100 kHz? What about a few 10s of kHz? I have a specific application in mind. Is the speed limit from parasitic capacities, and if so, which ones?
I set it up so there was a current shunt being amplified and compared to a potentiometer. It is going to be a short circuit protection board. By ading a mosfet with gate resistor, controlled by the output of the comparator, I made an oscillator. While it was on a breadboard and the mosfet only had a gate resistor, it only oscillated at 44kHz.
So that go me wondering. What’s the maximum frequency it is recommended you use the LM358 at for good operation? I am looking for a rule of thumb type of thing, I know it can vary. Can you use it to compare or amplify a variable shunt voltage being switched at a few 100 kHz? What about a few 10s of kHz? I have a specific application in mind. Is the speed limit from parasitic capacities, and if so, which ones?