# How can I find the slope at Vout/Vin at Vin = 0, from the datasheet about Op-amp?

I'm trying OpenModelica and I'm going to simulate an Op-amp.

(No it's not Windows 95, it's IceWM + Ubuntu 20.04)

But I wonder where I can find the slope Vout/Vin when Vin = 0 in the datahseet? I have heard that the slope from an Op-amp is so large so not even the datasheet write it out. Is that true? Or can I find it?

Assume that we are using this datasheet: https://www.mouser.se/datasheet/2/389/cd00001046-1795623.pdf

• Is that true? - is it true that you have heard it - you may have heard this but it's untrue. Mar 14 at 11:22
• @Andyaka So why does OpenModelica ask about it? Mar 14 at 11:33
• I have heard that the slope from an Op-amp is so large so not even the datasheet write it out. That's pure nonsense, writing a large number is easy. Next time, when in doubt, immediately ask WHY?. That should help detecting BS like this. Anyway, the term "slope" is confusing as it often refers to change of a signal over time. Vout/Vin (at Vin = 0) is simply the (small signal) gain. Which is listed in every opamp's datasheet. Mar 14 at 11:34
• Please see this: youtu.be/7FYHt5XviKc?t=163 Mar 14 at 11:37
• Most of us (including me) have seen Dave's video already, I think that the chance that you misunderstood Dave's story is much more likely than Dave telling nonsense. Dave's audience consists of beginners but also many old-farts (like myself) who will immediately point out any mistakes. So you can assume what Dave says is not nonsense. Mar 14 at 11:40

• Look carefully, there is no 100 dB anywhere in the datasheet. It is $A_{vd}$ = 100 V/mV which is the same as 100 000 V/V or a factor 100 000. Mar 14 at 11:37