Fake 24/32-bit ADC, is that possible??

[snojohn]

Hello all, I was looking for a source for 24-bit ADC's and find that you can get no less than a 32bit ADS1262 from China at a little more than $3 a piece. That seems like an abnormally low price. They also show a picture of the chip - without TI logo. Are these somehow fake? Do they work? Who could make such a complex IC if not TI? I would really like to hear about experiences if anybody has any, negative or positive.

 

[barry]

Could be a counterfeit chip. Or Stolen. China has stolen a lot of IP. There are also thieves stealing chips right from the foundries.

 

[BigBoss]

Or de-soldered from somewhere so second hand..

 

[Easy peasy]

what is the absolute value of the LSB for 32 bit in your setup ? what is the noise floor ?

Why wouldn't 24 bit do ?

 

[snojohn]

24bit would do, actually i would be quite happy with 22 and I frankly don't really understand how anyone finds the voltage references to work with much more.
But, the price for the 32 bit version just seemed bizarre to me. Btw the chips don't look de-soldered at all - if they send what they show, that is, of course - and it's not just one vendor but multiple. If anybody would steal chips from the foundry anyway, would they bother to remove the TI label from them?
Could these be chips that didn't make the grade and were discarded by TI (producing in China) before finishing and found their way outside? Perhaps I should get one just to test. Although, I don't think I even have the equipment to test a 32 bit ADC...

 

[barry]

Could the wafers that were stolen. Could be the IP.

 

[Warpspeed]

Or you could send your hard earned three dollars and receive absolutely nothing.