[sdiy] Opamp compatibility questions

[Roy J. Tellason]

On Monday 02 May 2005 02:36 pm, Mikael Mørup wrote:
> Hello list
>
> I have a few questions about some "older" opamps and
> possible pin compatible substitutes, prefereably in the
> TL0xx series, as i am stocking them already, but anything
> modern will do.
>
> 1) What is the difference between NE5534A and Ne5534AN ? 

I would guess that the difference is likely to be in the package material, and 
it may not even be different if those parts are from two different 
manufacturers.

> and is there a reason that a circuit should use one of each for
> what looks like very similar pre. amp. tasks ?

It's what they had on hand?  Are they the same mfr.?

> Any pin compat. subs for these ?

The 5532 and 5534 were low-noise parts as I understand it.

> 2) Any pin compat. subs for Ca3140E ?

The 3140 is a 3130 (all-CMOS part) with a bipolar output added.  Are they hard 
to find or something?

> 3) Am i correct in assuming that TL084 can substitute LM348
> ?
>
> 4) Any pin compat. subs for LM324 ?
>
> 5) Any pin compat. subs for LM1458 ?

Pretty many.  I've used 1558, 4558, and 5558 for those,  no noticeable 
difference.  Nothing critical there...

> I can probably get these older opAmps, but i would really
> like to standardize around, and stock as few different as
> possible.

These seem to be pretty standard and common parts,  with the exception of the 
3140,  which I've used in a few projects.