Hello all,
I have been contemplating making my own voltage reference to use both for checking my meters for similarity between them, as well as a means to check some projects that I have in mind for the coming months.
Naturally I have read the TI datasheet several times as well as the addition BB application notes.
In honesty I have mostly just copied the data sheets in my schematics, however, as expected the datasheets made reference to how important grounding, particularly star grounding, is for a reliable voltage reference.
I was hoping that those more experienced than I would take a look at my design to see if anything is amiss, or could be improved.
If I could get an extra 2 digits out of it (10.00002vdc), compared to its base accuracy (10.0025vdc), that would be the best case scenario, even if that is wishful thinking.
For what its worth, besides using it to compare commercial meters, I plan to try and make my own version of Scullcom 6 digit meter, along with an integrated constant current load, which would also allow me to use the meter for power and resistance calculations, it would included dual adc channels so I could measure both at the same time. Control via STM32/Arm Cortex M3, at least that's my thinking at this stage.
I realize that I could simply buy a reference of Ebay/Banggood/AliExpress with the AD584 for sub $20AUD, which will be a reasonable amount cheaper than what I am planing, but thought the learning experience would be worth the additional cost.
So this hopefully will be the first of my successful steps on a road to bigger and better things.
Thank you