hello to all forum users.
I bought a ebay opa627ap.
how can I know if it is original.
Thank you very much in advance.
http://img849.imageshack.us/img849/7889/mka0.jpg
I bought a ebay opa627ap.
how can I know if it is original.
Thank you very much in advance.
http://img849.imageshack.us/img849/7889/mka0.jpg
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Don't buy on ebay to be honest. Buy it from a reputable seller....
opa627ap Stock and Price by Distributor | FindChips.com
Here you go!
opa627ap Stock and Price by Distributor | FindChips.com
Here you go!
Yes, but they say that there are many companies that produce them. In the photograph was not written by white and he sent me these white . How to determine if the original.
No, multiple companies do not produce OPA627. Only TI (Burr-Brown), though a number of factories may be used for the packaging and testing. Since these parts are 'graded out' (sorted for high-grade and low grade), some of the marking happens after test. This is the white lettering which is the lot trace code. So what you are seeing is normal practice. The marking looks authentic though the units still could be counterfeits. The only way to tell is to open one up and see if the silicon chip is the genuine article. Even then, it is possible that the unit was a manufacturing reject that somehow made it to the outside world (unlikely, but possible).
In my experience, I have not seen counterfeit marking that looks this good, but still one can't say for certain.
In my experience, I have not seen counterfeit marking that looks this good, but still one can't say for certain.
you could measure the parameters important to you - Aol, GBW, Slew Rate, and the real differentiator for the diFet OPA627 - input impedance linearity
lots of detailed measurements between fairly good op amps: SG-Acoustics · Samuel Groner · IC OpAmps
lots of detailed measurements between fairly good op amps: SG-Acoustics · Samuel Groner · IC OpAmps
Best I've put them on the weekend in a CD and listen to how they sound. It's the only thing I can do I do not excellent job in electronics.
I set opa. something are whacko in CD 53. crackling heard on both channels
even turn it on when the network goes out tv. changed folk same crackling
what happened there
even turn it on when the network goes out tv. changed folk same crackling
what happened there
on the reverse side of the chip, I saw it.
What does this mean
it opa627ap
thanks to all
What does this mean
it opa627ap
thanks to all
An externally hosted image should be here but it was not working when we last tested it.
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I had a lot of opa627/637 A and B and never saw this marking. Post some pictures of the top of the ic.
I talked that not good in electronics
I soldered all the contacts when soiled tin and it was not visible
today launched a search that closes saw my poor job
all brushed my and began to play
I do not know, or is the original opa but sounds nice
thank you very much to all 🙂
I soldered all the contacts when soiled tin and it was not visible
today launched a search that closes saw my poor job
all brushed my and began to play
I do not know, or is the original opa but sounds nice
thank you very much to all 🙂
You need to put a few drops of acid on the IC until it burns all the way down to the die.
Then you need to look at the die with your naked eye, a microscope, a camera etc. and you'll be able to identify if it's the OPA627 circuit die or not.
I can send you a link to a picture of the OPA627 circuit if you wish to use acid.
It should be possible to open the IC with a knife somehow as well.
Then you need to look at the die with your naked eye, a microscope, a camera etc. and you'll be able to identify if it's the OPA627 circuit die or not.
I can send you a link to a picture of the OPA627 circuit if you wish to use acid.
It should be possible to open the IC with a knife somehow as well.
It was big thread on headfi diy section about fakes opa627. You need to measure resitance between legs. Google it.
Vlad.
Vlad.
I do not have of suitable equipment for this.
please tell me if I can put on a single board opa and Lt.
or something else.
thank you
http://img849.imageshack.us/img849/7889/mka0.jpg
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