I have 3 op amps, and they perform in two different ways, but I am not sure why. I want to buy another op amp that behaves a specific way, but I'm not sure what spec causes it to behave like this.
Here are the 3 op amps I'm using. I will refer to them as A, B, and C respectively from now on.
A) NJM072CAG-TE2 - Acts Strange
B) RC4558P - Acts strange
C) LM324DR - Acts Ideal
After a lot of hassle, I decided to use them in a very basic way to test their properties using a voltage follower circuit with supplies (V-)=0V and (V+)=5V (now we won't have to deal with gain and such).
I hooked up Vin to a variable power supply (0-5V), and I measured Vout with an arduino and made graphs. As I increased the voltage from 0->5V and back down, here's what the output looked like for each of the three op amps. Red=Vin, Blue=Vout
Notice how A and B output a high voltage when the input is 0 (it stays this way until about 1.0V).
So my overall question is: How can I know if an op amp will "Saturate" or not at 0V (Like A & B) instead of following the voltage properly (Like C)?
Thanks in advance!