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by willis936 251 days ago
Well, if you're trying to measure DC extremely accurately the old stuff is still golden. Multi-slope is the gold standard and no one will sell you one. Delta-sigma get most of the way there.

https://youtu.be/upTgM_S5rAQ

And if you want to see CERN's multimeter, check this out.

https://youtu.be/D28uSzCs7-k

Marco Reps is a treasure.
1 comments
shadowpho 251 days ago
>Multi-slope is the gold standard and no one will sell you one.

Why not?

link
willis936 251 days ago
The delta-sigma is conceptually very similar and gets you most of the way there for DC performance, but can be used for sample rates in excess of 100 kSamp/s. Multi-slopes also need large passive values that make an integrated solution impossible. Keysight will still sell you their 3458A.

Also, the AD7177-2 exists. That might be evidence enough for delta-sigma's victory.

link