help, doubt about the difference between an integrated ba4560 and a 4558

[baldor]

I am designing a 30 hz low pass but I had the idea of looking for the best operational amplifier, I found several but that difference between BA4560 and 4558 caught my attention. I ask for opinions

 

[dotneck335]

IMO, a 4558 is one of the WORST opamps currently available. It's really only a pair of 741s in a DIP-8 package. NE5532s (~ $1.00) or LM4562s (~$1.50) are so inexpensive these days that it's silly not to use one of them.

 

[abraxalito]

For a 30Hz LPF hi-spec (i.e. high GBW, slew rate) opamps aren't needed though. 4558 offers phenomenal bang-for-the-buck as on Taobao it goes for $0.02.

 

[dotneck335]

That's about what it's worth, I'd say.........

 

[JMFahey]

a 4558 is one of the WORST opamps currently available. It's really only a pair of 741s in a DIP-8 package

Sorry but no.
What you are talking about is 1458, you missed by a few thousand

4558 is quite good (there´s a reason it´s a classic), specially because, contrary to all Op Amps of that era, this was the first one optimized for Audio, go figure.

Even after TL072 appeared, I kept using 4558 for transformerless input balanced mic preamps, because if driven from a low impedance source it was less noisy than others.
I´m talking actual use and compared side by side, not just datasheet swimming.

4558 was so good, that it was eventually upgraded (4560), rather than fully replaced.
VERY FEW components get that royal treatment,they just get swept away and fully replaced, not this trusty workhorse.

As a side note: even today humble 1458 is kept for one feature , not shown on datasheet but present there: in the simple "one dual Op Amp reverb circuit" many manufacturers (notably Marshall) have kept sourcing and using it.
Clearly it drives reverb tanks better than others.
Not because of cost or availability , amps using them bristle with TL072 or M5201 and keeping inventory of a different one MUST be justified by "something".
FWIW they were replaced by 2 or 3 parallel sections of TL07x, go figure.

And the "two 741 inside one package" does not need to be taken literally, even if printed on the datasheet, long ago 741 was the classic Op Amp (at least the first in wide use) and everything was compared to it ... even if actually much better

 

[Mooly]

If I remember correctly the 4560 did have considerably better output current ability than the 4558, better even than the 5532.

 

[leadbelly]

IIRC the 4558 can go quite low on supply voltage, and that's probably one reason why it's so popular for MI. Unfortunately I can't remember which datasheet that was listed.

 

[Perry Babin]

There's also a 4580. I've seen a lot of the 4558s in the preamp sections of amps. I've only seen the 4560 and 4580 in the drive stage of class D amps, possibly because the 4558 is easily good enough at audio frequencies.

 

[dreamth]

just another best op-amps topic...there's a huge offer of new (more expensive)op-amps and the older ones get scraped day by day...try njm2114 njm 2043 or njm4556 too as there still are some for sale .They are very low noise too.

 

[baldor]

Thank you very much for the valuable suggestions friends