Products > Test Equipment
Cheap, not Chinese, Voltage reference for DIY meter calibration
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dazz1:
Hi
I found the thread on cheap Chinese AD584 voltage references but then I started looking at DIY design and build.
When I did a search, I found very high performance devices and reasonable prices.  Just one example being the Max 6325.  1ppm temp coeff and 0.02% tolerance.  Far better than an AD584.
https://www.digikey.co.nz/en/products/detail/analog-devices-inc-maxim-integrated/MAX6341CSA/1867167

Just wondering if my next project should be to design and build a very cheap and very high performance voltage reference so I can check-cal my small collection of test equipment.
tautech:
LOL, go for it Dazz !
Sorry if our emails had you tossing and turning about this last night.  :D
nctnico:

--- Quote from: dazz1 on June 04, 2024, 10:26:47 am ---Hi
I found the thread on cheap Chinese AD584 voltage references but then I started looking at DIY design and build.
When I did a search, I found very high performance devices and reasonable prices.  Just one example being the Max 6325.  1ppm temp coeff and 0.02% tolerance.  Far better than an AD584.
https://www.digikey.co.nz/en/products/detail/analog-devices-inc-maxim-integrated/MAX6341CSA/1867167

Just wondering if my next project should be to design and build a very cheap and very high performance voltage reference so I can check-cal my small collection of test equipment.

--- End quote ---
The long term stability and low temperature coefficient are great, but the tolerance is likely higher than you would want for DMM calibrations. A typical 4.5 digit DMM sits around 0.05% already.
m k:
Where is tolerance?

I found only initial accuracy.
BeBuLamar:
I don't understand! Cheap not Chinese?? The AD584 is Analog Device and it may be made in China but the MAX 6341 is by Maxxim Integrated which is part of Analog Device so how would you know that it is not made in China too?
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