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OPA4227, why out of stock so much?

Discussion in 'Electronic Components' started by Joerg, Feb 28, 2007.

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  1. Joerg

    Joerg Guest

    Usually I can get by with jelly bean amps but not this time. Offset
    should be well under 1mV but most of all the input noise must be under
    5nV/sqrtHz. Supplies +/-15V, TSSOP or SOIC, quad package. The OPA4227
    fits the bill nicely with plenty of margin. Then came the awakening: Out
    of stock at Digikey and Mouser. Same for its faster brother, the
    OPA4228. Big red flags went up.

    Could the OPA4227 be falling from grace for some reason? If you know
    what replaces it I'd appreciate a hint. I am looking around myself now
    but want to pick something that's going to be around for a couple of
    decades.
     
  2. Joerg

    Joerg Guest

    Might add one here that can work: AD8674. In stock but rather expensive.
    Around $4. Ouch.

    The only guys I didn't try was National. Their web site repeatedly
    pulled a blank after narrowing down the opamp selection. They really
    messed up their site, big time. Anybody listening at National? I guess
    not...
     
  3. Uwe Bonnes

    Uwe Bonnes Guest

    Do you remember when the National Guys advertised the web page
    as "no thrills"? Now they want me to download some flash thing, that I have
    always to deny by clicking when entering their site.

    Reg. TI: rumors are that a lot of BB products where moved to an asian site
    and bigger wafers and to a different test site. It seems that things didn't
    go that smooth as expected. Look at the lead times of the ADS8344
    e.g. Constantly "26 weeks" since last august. INA114 isn't better, and so a
    lot of other chips...
     
  4. Joerg

    Joerg Guest

    IMHO they seriously messed up their site. Ok, the flash gimmick can be
    ignored. It's just one extra and unnecessary click. But now I frequently
    encounter a blank page when trying to dive into detailed product
    listings, repeatedly. After 2-3 times I move on to a competitor. Since
    their, ahem, "web site enhancement" I have not designed in one single
    National part. That was very different before. Maybe it's just me but
    the truth cometh onto the table with their next quarterly financials.

    And no, I will not take the typical web kiddie excuse that I have an
    incompatble browser. A site that only works with a select few browsers
    is IMHO a poor job.


    That has me concerned as well. It would basically leave AD and LTC as
    the contenders and their products tend to be high cost. Not that I find
    them overpriced in any way, it's just that I don't usually need the
    extremely low offset voltages they offer. It is like buying a Porsche in
    the US where you can't drive faster than 65mph anyways. Yep, I sometimes
    miss your autobahns.
     
  5. Rich Grise

    Rich Grise Guest

    I remember when the National data books were like the Holy Grail of data
    books. Vendors used to have a "literature room", where you could just walk
    in and help yourself to any data books they had - the Nationals were
    always picked clean when the slow guys got there. :)

    I was working in Orange County, CA at the time and was almost within
    walking distance of Arrow, Future, Newark, and a bunch of other vendors -
    Everyone had a shelf full of data books. Nowadays, they don't even _print_
    them any more! )-;

    Cheers!
    Rich
     
  6. Eeyore

    Eeyore Guest

    Well..... the Nat Semi Audio Handbook finally got reprinted.

    Graham
     
  7. Guest

    Guest Guest

    this is exactly what will happen to the remainder of our technical dtabases
    also.

    as this stuff evolves ever more quickly, they just cant spend
    time/money/trees to put it all into hard copy! (at least not for public
    distribution)

    some legislation (omigod!) should be initiated to help (FORCE) the
    brilliant minds to deposit at least a copy of their works into soem majestic
    government vaulted room filled with currently useable data storage devices.

    a duplicate room would be created every say 5 years with new technology and
    the first room's data replicated into the new media.

    otherwise, the lack of continuity from genereation to generation will be
    fragmented at best.

    so, who knows where to find a lenticular refractor lense for a 1740
    duGenereaux magnification device? or what the curvature and specs are? or
    even if they existed?.....
     
  8. Joerg

    Joerg Guest

    And that is why those are on this here shelf and will remain there until
    the slide rule falls out of my hands. Then, hopefully, they'll migrate
    into the hands of another engineer. The web clearly is not a reliable
    replacement for databooks. Nor is it fast enough the way most semi mfgs
    have "organized" their sites.

    Yesterday I was picking parts out of a well worn 2003 TI selection
    guide. Much faster than online.

    Some, like TI, have a service where you pay the printing and shipping
    costs and then they'll have one printed up and sent out to you. Makes
    perfect sense to me. Many moons from now other companies might realize
    how practical that is. Or maybe they don't.

    In the same way lots of people have (finally) come to realize that their
    newfangled PDAs aren't all that useful and are going back to, gasp,
    daytimers. I've always stayed with my daytimer because it works.
     
  9. Guest

    Guest Guest

    yes, the extra steps, power, intelligence and technique required to "improve
    on reading" via these gadgets has me befuddled.

    how did we all get sold this amazingly in-efficient techno-baloney anyway?
    is it just another "toy for grownups?"

    me thinks the Occam Razor solutions are the best way, never confound
    straight forward remedies with yet other confounding remedies!
     
  10. michaelchina

    michaelchina Guest

    hi, Joerg Schulze-Clewing

    we have many stock for opa4227,but could you let me know the exac
    suffix you interest
    there is have many suffix ,eg. opa4227ua,opa4227pa, we hav
    opa4227ua
    hope to hear from you

    we have especialized in electronic over 19years.most of ou
    customers of china distribute repairs line and graduate school ,w
    also have plenty of overseas customers,pls find our reference i
    enlosed documents
    because we have many years experience for repairs line,so we ca
    convince you of our service,we hope to establish long-term trad
    relationships with you
    since 2001,we became a member of ERAI

    pls give me e-mail if you need any component, sepeciatel
    stop-producted,hand-find

    MY msn: skype : michaelvisual

    huandong electronics ltd
    Usually I can get by with jelly bean amps but not this time. Offset

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