I stand corrected, you are right. Still it is remarkable as specifications differ significantly.
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maybe it is a fake, however, OPA1612 is also nice stuff, and such a fake looks like gold faked by platinum.
@IVX as you are en Chinese company, how you as a local deal with fake parts and how one outside of China should act/deal with those bastards.
IMHO, in the old days, I company I worked for had an own department just to do the pans off for quality reasons.
Is the any official company how deals this chip tear down as a service?
IMHO, in the old days, I company I worked for had an own department just to do the pans off for quality reasons.
Is the any official company how deals this chip tear down as a service?
even in China, if you buy stuff from a big and famous seller, like Arrow, and other official distributors, you have zero chance of getting fake.
However, if I need to check some idea with the particular opamp right now, or let's say tomorrow morning but a big parts seller currently has no those parts, then I may order that from the tb spot. That's why I keep my eyes open and even get the metallurgical microscope. For the production, I'll wait until a big office offers me the part.
However, if I need to check some idea with the particular opamp right now, or let's say tomorrow morning but a big parts seller currently has no those parts, then I may order that from the tb spot. That's why I keep my eyes open and even get the metallurgical microscope. For the production, I'll wait until a big office offers me the part.
Finally, I've got opa2891 SO-8 to try with my Cosmos APU and others. The result was worse than I expected and IC looked a bit like remarked, so I decided to look at it under my microscope. I don't know, the supplier is a trusted one, any ideas??
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OPA2891 is the follow up to THS4032. It likely is not a fake but a remarketed product by the manufacturer. Official fake so to speak 😉
I have doubts about it, look at the marking, and the plastic surface texture. The font was used rather like for ST chips. Plastic top corners are sharper vs the original, hence, the face was grounded off to hide THS4032. Also, the texture isn't similar to opa1612 and looks more mate.
The supplier is a trusted one on the wet market of Wuhan? If not things are unlikely to be fake.
one more surprise from Ti, LP5907 actually has the National-semiconductor logo on the silicon, and 'LP5907 2012'. I didn't find the original national semiconductor lp5907.PDF..
Regarding the OPA2891, I just checked the visual appearance of some samples that I ordered directly from TI. They look exactly like yours, with the same font, pin 1 marker etc., so it looks like there is a good probability that your parts are genuine.
In what way was the result worse than expected?
In what way was the result worse than expected?