Op amp testing and measurement

[Hyena]

Hi, I just found this web, where is interesting op amp tester and measurement.


http://www.analog.com/en/analog-dialogue/articles/simple-op-amp-measurements.html


I also found many simple "testers", but they does not measure anything. I am thinking about this, because I found all LM308 from china faulty. When I finished my TGSL it does not give a sh*t if I move metal near coil or not. When I swap LM308 with TL071 it worked as it should... So I want to measure all possible parameters of Op amp and see if there are some major differences or not.


Or do you know some another easy way how to distinguish which op amp is no-go?

[homefire]

Assume the LED's fire up if good as a Comparator ? Don't think this tester checks both Directions.

[Hyena]

Assume the LED's fire up if good as a Comparator ? Don't think this tester checks both Directions.

My fault In that post is "toy tester" !!!

This is properly looking tester - just a little bit more complicated

http://www.analog.com/en/analog-dial...surements.html

[green]

[Or do you know some another easy way how to distinguish which op amp is no-go?]

I was going to reply, read the spec. sheets measuring a lot of the parameters can be difficult. I was wrong.

[homefire]

LOL I would just put it in circuit and look with a Scope. It's Good or it's Not. All those switches gave me a head Thumping just trying to figure out what they was doing. LOL

[Hyena]

Two rotary switches and 4pcs 2-pole switches give you head thumpink?

It looks like it would be possible to drive this with PIC.

I would like to measure this before I solder that op amp to place. When I do not want to use socket, because it caused false signals. This is only one method I found yet.

[WM6]

Your test circuit can say OpAmp part is OK, but it still cannot work properly in your real circuit configuration.

So you still need to test OpAmp in real circuit and set adequate to its purpose working conditions.

[homefire]

Yep, how it's being used could be the GO NO GO .