Except that Texas Instruments does not make anything with those names/numbers. I asked them.
OPA1612AIDR and OPA1612AUDRGR are explicitly listed in the OPA1611/12 datasheet, and OVII is the marking for the latter (which is too small for a long code). Look for the package option addendum at the end. I think A is just the major version, I is industrial temperature range, D is SOIC package, DRG is SON package, R at the end for reel.
Interesting. So much for asking customer service. Must have been some confusion. Either that or what they meant was that the ones I have are not genuine. Not sure at this point I guess. Sorry for the confusion.
https://www.ti.com/lit/ds/symlink/opa1611.pdf
It's alright. TI is known for using bots instead of real people for (some of) their customer support services.
I wish we'd just have an "identification chart" or perhaps a general guideline to identify genuine parts.
P/s: Just after writing this reply I remembered about your overheating op-amps...If they aren't fakes, could it be that the "oscillation" by improper surrounding circuitry causes them to overheat? They may very well be underperforming, though I should wait for other members to chime in.
I wish we'd just have an "identification chart" or perhaps a general guideline to identify genuine parts.
P/s: Just after writing this reply I remembered about your overheating op-amps...If they aren't fakes, could it be that the "oscillation" by improper surrounding circuitry causes them to overheat? They may very well be underperforming, though I should wait for other members to chime in.
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They were not overheating. They were very warm with a finger touch, but they didn't burn my finger. However, they just didn't sound as good warm as they did stone cold, so I fabricated tiny little heatsinks from the material I had on hand, which happened to be brass. Admittedly not an ideal material, but it's what I had. I'm not using them right now, having switched to Burr-Brown, but I may come back to these some day. I have no idea if they are genuine, I doubt it. The printing on them is awful.
I also perforated the top of the DAC where the four op-amps are located and installed custom made lead bars in the chassis to weight it down because I was tired of it sliding around on the shelf. A guy on ebay made the weights for me. I found tiny heatsinks on ebay to put on the Burr-Brown chips, and they now run cool to the touch.
I also perforated the top of the DAC where the four op-amps are located and installed custom made lead bars in the chassis to weight it down because I was tired of it sliding around on the shelf. A guy on ebay made the weights for me. I found tiny heatsinks on ebay to put on the Burr-Brown chips, and they now run cool to the touch.
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Morning. I didn't. Just did a visual inspection . Carefully inserted them into the turned key sockets in the pre amp without murdering them and left them be. I can do tests if required. Multimeters and scopes are at work though.
They might just be better quality fakes than the last ones though 🙂
They might just be better quality fakes than the last ones though 🙂
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Does it have any copper protruding a bit from the sides? How are the legs? Use some stronger neodimium magnet.
Top seems well made, small deviations which can be production, small deviations comparing to mouser ones. I don't see tiny areas of copper protruding though. Legs must be literally pliable, very much so. No magnetism whatsoever as well.
Top seems well made, small deviations which can be production, small deviations comparing to mouser ones. I don't see tiny areas of copper protruding though. Legs must be literally pliable, very much so. No magnetism whatsoever as well.
Most markings are there, but top is still a bit off comparing to mouser one.
Here is a statement from muses official website, that states only mouser, digikey and profusiom are official distributors of their products. And out of which all keep their prices above what you paid. So hard to belive someone would purchase at much higer price (even in insane quantities), and sell for much cheaper. Anywho, heres the statement:
We have recently detected many counterfeit semiconductor products that have very similar appearances to our operational amplifier “MUSES” in the world-wide market. In most cases, it is hard to distinguish them from our regular products by their appearance, and some of them have very poor quality and performance.
They can not provide equivalent quality of our regular product, and they may cause breakdowns or malfunctions if used in your systems or applications.We would like our customers to purchase “MUSES” through our official sales channels : our sales branches, sales subsidiaries and distributors.Please note that we hold no responsibilities for any malfunctions or damages caused by using counterfeit products. We would appreciate your understanding.
To me thats quite enough information not to buy from aliexpress and the likes 🙂
Here is a statement from muses official website, that states only mouser, digikey and profusiom are official distributors of their products. And out of which all keep their prices above what you paid. So hard to belive someone would purchase at much higer price (even in insane quantities), and sell for much cheaper. Anywho, heres the statement:
We have recently detected many counterfeit semiconductor products that have very similar appearances to our operational amplifier “MUSES” in the world-wide market. In most cases, it is hard to distinguish them from our regular products by their appearance, and some of them have very poor quality and performance.
They can not provide equivalent quality of our regular product, and they may cause breakdowns or malfunctions if used in your systems or applications.We would like our customers to purchase “MUSES” through our official sales channels : our sales branches, sales subsidiaries and distributors.Please note that we hold no responsibilities for any malfunctions or damages caused by using counterfeit products. We would appreciate your understanding.
To me thats quite enough information not to buy from aliexpress and the likes 🙂
It'd make more sense than going through varying levels of fakeness trying to find an original.
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There's 100's of scientists and engineers on site at work. I'm sure they'd be up for the challenge 🙂. The fact they have non magnetic copper/zinc legs makes them interesting .
50 shades of fake semiconductors 😉
Give your colleague one of those, next day he comes back wanting to buy the audiophile op-amp off of you, as he kinda needs a LM317 for his pet project...
I hope it won't be the case.
Give your colleague one of those, next day he comes back wanting to buy the audiophile op-amp off of you, as he kinda needs a LM317 for his pet project...
I hope it won't be the case.