Rms converter to match HP3400A?

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Thanks for keeping the convo going. The strange layout led me to look around on ADI's, and now I have a new favorite: ADL5511 for the rebuild.  https://www.analog.com/media/en/technical-documentation/data-sheets/ADL5511.pdf 

Looks like they gave higher priority to getting that bottom pad connected. DC-wise, what they did is valid. Maybe at 10 MHz, it's still ok to not have that balanced layout...

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You get excellent results considering the markings are not right for a genuine part.

anniel747 said:

considering the markings are not right for a genuine part.

Q1 is per AD specs. What's off with that package?

Location, spacing and font rendering.

Location, spacing and font rendering.

That may be fab dependent. The data sheet's package spec is that it has Q1. 
For AD SMDs, I've had worse from trusted distribution channels.

Trusted distributors also get fooled from time to time.

www.eletimes.com/the-growing-market-of-counterfeit-electronic-components-and-its-repercussions

In the article “Manufacturers should opt for blockchain technology to locate the components as separate blocks in the chain. This way they can verify precisely where the parts came from and when they arrived in the supply chain.” 

However, it is easier said than done. The author’s mention of this alongside visual inspection on the same page undermines the credibility of the article.

I once read that when X tells you that the answer to Y is Blockchain, then the only thing you learn is that X knows nothing about Y or Blockchain.

More seriously - I'm happy to buy parts of uncertain origin to play with, I wouldn't buy them for serious work let alone safety critical stuff.

The little Eval boards from China are not obviously fake or counterfeit. The chips on them work fine (although they might be second hand). The boards I've bought recently are not clones but new designs (although based on the app notes which is perfectly OK).

They provide a service to the greater good by applying price pressure to the major players, and if they use second hand parts that helps the planet too.

There are certainly fake parts around which don't really work at all or are dangerous - and I wouldn't knowingly buy them or support their production.

MK

Many manufacturers already use blockchain technology and visual inspection has been used for quite some time.

michaelkellett  "A counterfeit is an illegal/ unauthorized copy of an original electronic component that is misrepresented as a product of an original equipment manufacturer (OEM)/authorized manufacturer. A counterfeit electronic part does not conform to the regulatory measures adopted by OEMs like design, model, or performance. It can also be an off-specification, defective, or used OEM part sold as new or working and possesses wrong or false markings and documentation."