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LM358 alternative

Discussion in 'Electronic Design' started by Raveninghorde, Sep 19, 2011.

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  1. I use the LM358 by the bucket load because they are cheap. I also use
    the LM358A for the better offset voltage spec.

    I'm always on the look out for an alternative with lower offset that
    is still cheap. I've just come across the LM2904A/LM2904AV from TI.
    The V version runs at 32V same as the LM358. The offset voltage is
    better, 1mV typical compared to 3mV and worst case 2mV as opposed to
    7mV for the LM358. Basically the same spec as the LM158A.

    They are cheap as well. We pay about $0.07 for the LM358 and these are
    $0.09.
     
  2. Jamie

    Jamie Guest

    Not all of us have the luxary to buy at mass volume to get that price!

    Jamie
     
  3. bw

    bw Guest

    For the price, the LM358 is likely the best.
    LM358 and LM2904 are identical except for max voltage allowed. There is a
    Fairchild datasheet that covers both. The LM258 has a slightly lower offset.
    If you really need lower offset then join the 21st century since about any
    modern device will do. Most are now SOIC-8.
    A LM358 replacement with better specs would be OPA2277 for just one example.
     
  4. You can buy the LM358M for $0.06 apiece if you're willing to buy $150
    worth. Not exactly a king's ransom.


    Best regards,
    Spehro Pefhany
     
  5. As I stated TI do better versions of the LM2904:

    http://www.ti.com/lit/ds/symlink/lm2904-q1.pdf
    OPA2277 is over 10x the cost of the LM2904AV. It's too expensive for a
    lot of applications.

    You're forgeting the definition of engineering. An engineer does for a
    dime what any idiot can do for a dollar.
     
  6. These guys:

    http://www.masterdistributors.com/

    I've bought from them before.


    Best regards,
    Spehro Pefhany
     
  7. Guest

  8. Don't know, but what I did buy from them (a couple thousand dollars
    worth of Fairchild optos) was okay.
     
  9. Guest

    A reel of floor-sweepings can ruin your whole day.
     
  10. BTDTGTTS. 8-( And dealing with Chinese and other offshore sources can
    ruin more than your day. Counterfeits, old parts, deliberately mixed
    wrong parts, etc. etc. I once got a shipment of PCB-mount fuseholders
    from Taiwan that literally had scrap metal floor sweepings added the
    bag to make up the weight.

    AFAIK, those guys are legit. Here's their line card:
    http://www.masterdistributors.com/md_linecard.pdf

    Anybody else deal with them?
     
  11. Jamie

    Jamie Guest

    Not in my place, it seems lately it's quite the opposite! ;)

    Jamie
     
  12. Jamie

    Jamie Guest

    I found some at Mouser for 0.16 , that's the beast I could do.

    Jamie
     
  13. LM324s are usually almost the same price and have twice as many
    (crappy) op-amps in one package. Often under a dime in moderate
    quantity.



    Best regards,
    Spehro Pefhany
     
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