IC opamp replacement experts please help

Discussion in 'Digital Sources' started by ferninando, Jun 11, 2017.

  1. ferninando

    ferninando AK Subscriber Subscriber

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    Having hard time finding cross ref of 2 opamps.
    1. LM4562NA/NOPB
    2. CX21097 (sony)

    #2 used in a Sony CDP.
    #1 possible plugin replacement?

    Can anyone help me?
    I AM DESPERATE

    thank you
     
  2. gslikker

    gslikker Super Member

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    no 1 you can buy at Mouser
     
  3. ferninando

    ferninando AK Subscriber Subscriber

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    wrong answer
     
  4. ConradH

    ConradH AK Subscriber Subscriber

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    What are you looking for? You won't find much better than the 4562, just different. There are lots of parts that are different and will plug in. You could try an NJM4562. I see no data on the 21097 at all so you'd have to say what CDP it's actually in.
     
  5. gslikker

    gslikker Super Member

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  6. ferninando

    ferninando AK Subscriber Subscriber

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    thanks conradH. I too cannot get 21907 data. And so I am here.
    the CX21907 is in my SONY cdp 302. It is used in the low pass filter at the output.
    Id like to compare data of the 20197 with the 4562 to be sure its a match.
    Much obliged
     
  7. w1jim

    w1jim I can fix it but good... Subscriber

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    Do you have a schematic for the Sony?
    If so try to compare the pin outs.
    I'd put a socket in and give it a try - but then that's me.
     
  8. ConradH

    ConradH AK Subscriber Subscriber

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    Filters can be fussy about opamps, but this looks pretty simple. I too would put in a socket and try the 4562. Just look for oscillations, as that would be the thing to worry about. The filter slope itself should be OK. Or, try the other well known audiophile approved duals!
     
  9. ferninando

    ferninando AK Subscriber Subscriber

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    I do and I sure will.
     
  10. ferninando

    ferninando AK Subscriber Subscriber

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    Sockets are a must do. I have the svc mnl.
    can you give me a hint of the other well known audiophile approved duals. ?
    would they be drop ins?
    thanks for the help conradH
     
  11. ferninando

    ferninando AK Subscriber Subscriber

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    pin outs do match, good.
     
  12. ferninando

    ferninando AK Subscriber Subscriber

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    So I ordered a quad of Nat. LM4562s for $13 no shipping.
    thanks for the help conradH and w1jim.
     
  13. ConradH

    ConradH AK Subscriber Subscriber

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    Here's some info on other types to think about...

    Not a bad list here- http://www.cycfi.com/projects/six-pack/op-amp-shootout/
    These people should know a thing or two- https://e2e.ti.com/support/amplifie...gn_notes/upgrading-op-amps-in-audio-equipment
    230 pages on the topic!- http://www.diyaudio.com/forums/chip-amps/154106-best-sounding-audio-integrated-opamps.html
    SMT is the rule, so you need these people- http://cimarrontechnology.com/audioupgradeadapters.aspx

    I just stick with a few parts I know and love, not having the infinite amount of time it would take to test all this stuff!
     
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  14. ferninando

    ferninando AK Subscriber Subscriber

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    thanks conrad for the links. just what I like for reference. all my opamp library ends in the 80s when i was working at HP.
    I accumulated all the databooks I could get my hands on.. especially the National Linear APP Handbook and Audio opamp handbook. and others.
    but soooo many new designs have been produced since then and i simply have not kept up.

    So what ARE you fav amps?
     
    Last edited: Jun 12, 2017

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