开云体育

Jeff,

it all depends on what one means by super impressive. The spec is for an accuracy of 0.1% at 10?V output. Over the temperature range, that's pretty good. If one requires much better accuracy than that, then a lot more pomp and circumstance is necessary, obligatory perhaps.

It's more than good enough to check the DC accuracy of a 3? digit DVM (or many sampling scopes), and to get one started on a process to check wider ranges.

And it's way way simpler—and far less of a health hazard—than a standard Weston cell! Also a lot cheaper than a modern Josephson standard.

And best of all, the AD854 chip is probably a recycled pull from some other equipment. And now one can see just how good 30 and more years old DVM's can be—a real tribute to the designers' and various manufacturers' craft & engineering.

73, Stay Safe,

Robin

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