AD584 vs. LM399 Voltage Reference Longterm Test Setup

One of the upcoming future projects is going to be the build of a high capacity 48V lithium battery bank. In order to be prepared and able to measure cell voltages with single digit mV precision, it became clear that the lab's multimeters may not offer high enough resolution or accuracy.

So we are trapped in the chicken - egg situation where we dont have good enough equipment to verify our measuring devices. Precision Voltage References to the the rescue then. But how stable and accurate are they? In order to help us and share what is learned with all of you, a cheap AD584 and a not so cheap LM399 "precision voltage reference" were purchased.

As you can see, so far (over the last 5 hours) the LM399 really wasnt worth the money...

This is going to be a longer experiment to see how far it can be taken, with a final video documenting the setup and results, so dont forget to follow, repost, share and like!

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