JRC 4556AD opamp Replacement? - diyAudio
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Old 26th February 2009, 04:14 PM   #1
Pyre is offline Pyre  Canada
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Default JRC 4556AD opamp Replacement?

Hello,

I have a Dynaco CDV-2 that has a JRC 4556AD as the opamp. I was looking to upgrade it as its quite an old piece. Is there a better drop in replacement available now?

Thanks.
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Old 26th February 2009, 09:41 PM   #2
UV101 is offline UV101  England
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Looks like a std dual op amp! Is it DIP?

There are any number of drop in replacements.

You can try LM4562NA for about £10 a pair. I've got a couple of set of these and they are very good. Even better with decent decoupling caps on the supply rails (Try Rubycon ZA's)
If you were feeling very extravagant, you could try LME49720H. These are excellent. They are in a slightly different form but not difficult to fit see this thread

http://www.diyaudio.com/forums/showt...63#post1741363

They are about £28 a pair on ebay!

Ian
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Old 26th February 2009, 10:19 PM   #3
Pyre is offline Pyre  Canada
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Thanks!

It is just a standard dip dual op amp I was just going to put in a socket so I could try a couple of different ones.

I happen to have a LM4562 here that I can try as I bought two of them when I swapped the old one out of a CDV-1 a while back.

I do not see any LME49720H's on Ebay right now but I will keep looking. 28$ is not bad if it makes a difference. They do look interesting.

Thanks for the help
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Old 27th February 2009, 09:16 AM   #4
pilli is offline pilli  France
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Quote:
Originally posted by Pyre
It is just a standard dip dual op amp ...
I think that one small thing that is specific to the 4556 is the drive capability, which is why you find it sometimes in CD players for the headphone output.

From the datasheet:
"The NJM4556A integrated circuit is a high-gain, high output
current dual operational amplifier capable of driving ±70mA into
150Ω loads (...)
The NJM4556A combines many of the features of the
popular NJM4558 as well as having the capability of driving
150Ω loads."


This feature (if your circuit needs it at all) shouldn't be diffcult to find in other better OpAmps - sorry, I don't have a suggestion in mind.


Cheers.

_
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