What is your suggestion to match the specs of the HP3400A AC millivoltmeter’s rms converter with analog parts available today? I’m drawing a line to exclude AD conversion and digital rms calculation. So it stays analog.
Below is the spec sheet:
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What is your suggestion to match the specs of the HP3400A AC millivoltmeter’s rms converter with analog parts available today? I’m drawing a line to exclude AD conversion and digital rms calculation. So it stays analog.
Below is the spec sheet:
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...
You get excellent results considering the markings are not right for a genuine part.
considering the markings are not right for a genuine part.
Q1 is per AD specs. What's off with that package?
Wild use of flux is another bad sign.
Parts should come with this label:
I reckon the no-name EVBs run at about 10% of the price of the manufacturer branded parts. The thick gooey flux seems to be a feature. So far I've had 100% success with such boards - I'm happy to run the risk since it means I can play with a lot more stuff than otherwise. If it were a project for a customer I would (probably) buy the real thing.
I've just received two different boards for the AD8367. The flux looks as if the board had been dipped in honey, I've cleaned one up but not got round to testing yet.
I'll start a new blog about it when I do.
MK