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fake opa627's in the wild.

post #1 of 175
4/15/08 at 10:04am
Thread Starter 
All,

I recently purchased some opa627's (bp) that didnt work as specified. I contacted Texas Instruments who have since confirmed they are counterfiet.

I am waiting from a reply from the supplier before i release details, but its somewhere that has been suggested here as a good cheap source for opa627's.

Warning - if they seem too cheap they probably are.

Lesson learned on my behalf!
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post #2 of 175
4/15/08 at 10:15am
Yeah it's been happening a while.

Was it a proper store or on eBay?

Would you mind PMing me?
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post #3 of 175
4/15/08 at 11:26am
Quote:
Originally Posted by adamus View Post
All,

I recently purchased some opa627's (bp) that didnt work as specified. I contacted Texas Instruments who have since confirmed they are counterfiet.

I am waiting from a reply from the supplier before i release details, but its somewhere that has been suggested here as a good cheap source for opa627's.

Warning - if they seem too cheap they probably are.

Lesson learned on my behalf!
Wow - I was wondering what your/their results were. First, I'm glad you figured it out with TI's help. Second, I'm sorry if you lost money on them. Hopefully TI will make you a nice award for some real opamps - you deserve it!
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post #4 of 175
4/15/08 at 12:46pm
Yes, thanks for taking the time and effort to have these evaluated by TI! Sorry it turned out bad, but good to know if you save anyone else from a similar fate. Hopefully the seller will refund your money as well.
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post #5 of 175
4/15/08 at 2:15pm
I bought some OPA637's cheap on ebay, and they actually sounded very good to me, no doubt about it. I had assumed they were old engineering samples someone rescued from the trash or something.
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post #6 of 175
4/15/08 at 2:28pm
Thread Starter 
mine were not from ebay. I got them on a recommendation from this forum. Its more than likely the upplier is oblivious to them being fake.

Lets hope i get a refund.
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post #7 of 175
4/15/08 at 2:58pm
What about them did TI say identified them as fakes?
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post #8 of 175
4/15/08 at 3:10pm
Thread Starter 
the number didnt tally to any of their production. The housing was unlike anything they make (no notch but with the bb logo).
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post #9 of 175
4/15/08 at 4:08pm
Do you have any pictures of them? Would be nice to see the silkscreen etc.

/U.
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post #10 of 175
4/15/08 at 4:18pm
Thread Starter 
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post #11 of 175
4/15/08 at 7:37pm
So... does this mean the $11 OPA627BP's from diykits.com.hk are probably fake?
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post #12 of 175
4/15/08 at 8:05pm
I would venture to guess that since Ti's qty1k wholesale price is currently advertised as $17.75 per each, that the $11 price point is extremely suspect.

When people resell engineering samples on ebay, 2 or 5 at a time, that's one thing, and the price can go anywhere. but someone stocking them and offering them at substantially less than wholesale? either stolen or fake.

($17.75 is for the opa627bp. the ap version is $12.25, but the pictured parts are BP, and $11 is still unlikely for a small retailer to sell the AP version either.)

(Further edit - especially considering that opa627 parts are out of stock with a lead time of at least 20 weeks, genuine production overstock lots from factories that bought at qty1k would thus be of accutely high value and would probably be sold at or above market value to other board manufacturers rather than dumped as surplus)
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post #13 of 175
4/15/08 at 8:20pm
Good pics of real OPA627BP's:
OPA627BP Photo: Enlarged
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post #14 of 175
4/15/08 at 8:43pm
OPA627BP are hard to find these days in my experience! If anyone is interested I bought a pair of OPA627BP from this listing on ebay for $37.98 shipped. They're supposedly from an estate sale. I haven't used them yet but they look legit with the dimple, correct ink colors and a correct looking lot code.
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post #15 of 175
4/15/08 at 8:45pm
Quote:
Originally Posted by CountChoculaBot View Post
Good pics of real OPA627BP's:
OPA627BP Photo: Enlarged
some of those look remarkably like the op's fakes.

They are also the only other pictures i've seen of opa627's with a corner dimple with vertical rather than rounded sides.

the "batch codes don't match" explanation, if you look around, is one we've seen before - and it's a good enough reason - but at least once it's been applied to a part that was purchased from Farnell, who is a licensed and reputable dealer.
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