LM318-N: Combination Offset adj. and Balancing

Morning Willem, 

I suppose you are talking about this figure.

1. The offset adjust is in the input stage - a DC balancing, but it does not improve drift

2. The slewing feedforward seems pretty crude, inverting only and probably injecting signal into the comp.node if the error voltage shows a transient to couple through  -not going to improve settling time with that AC coupled path. 

You can use both in one design, but why you would be looking at this when there are so many much better improved devices is a mystery. 

Hi Michael,

Of course there are much, much better OpAmps, but I am focussing on types without using a electron microscope and which I can solder myself. And, the price is also taken into account. The LM318-N is a replacement type for the original LF357 which is obsolete. Q: If you have a better replacement, I'll buy you a beer :-) All in all, thank you so far.

Regards, Willem.

Well, to screen down to current solutions, your design requirements would be useful. 

Keep in mind if the LF357 is gone, how far can the LM318 be behind it. Here is a quick x-ref search, not necessarily what you want, as your requirements are not yet detailed. 

Oops wrong part, here is the LM318

Yes, this X-ref works better. It seems that I have a different X-ref on the TI-site so far: BOM & Cross reference tool gives a different output. I you can provide the link I am happy, thanks!

Yes, this is an older internal one drawing on the SelGuide parametric database, the new one you are probably looking at is a 3rd party database, 

http://www.ti.com/amplifier-circuit/op-amps/cross-reference.html

Found, thank you!

Hi Ron,

Thank you for your reaction, my question was solved already. I forgot to push the resolved button.

Rgds, Willem.