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'[EE]:: DIY 0.01% voltage referEnce without too too'
OK reference source for most uses.
Better can be bought but this is "not too bad" for the money.
Element 1110 $4.89 NZ in ones
0.1% as supplied worst case output error
Call that 1000 ppm for comparison
8 ppm/C -40 - =125
7/50 typ/max ppm with Vin (presumably at 25C or fixed temp)
160 ppm/V Vin max across temp
14/30 ppm / mA sourcing
7/50 ppm / mA sinking
Stability 1000 hours 50C = 30 ppm
Drive from a 3 terminal regulator.
Load at constant load.
Vaguely oven (eg aircon room).
Or for lower power than ovening, use processor or other to calibrate for
Should be able to keep under 100 ppm without much effort or 10% of absolute
So MAY be able to build a device at relatively modest cost which can be
assembled untrimmed to 0.01% stability and 0.1% accuracy and trimmed down to
On Thu, Mar 24, 2011 at 9:20 PM, RussellMc <gmail.com> wrote: apptechnz
> OK reference source for most uses.
> Better can be bought but this is "not too bad" for the money.
> Element 1110 $4.89 NZ in ones
Overview of ADI Vref is here.
Be very careful about the "Out TC" value in the table though. It does not
necessary mean the worst case value and it may depend on the package.
We are using ADR03 and ADR43x series with 3ppm worst case
TC. For the ADR03, only the SOIC package and B grade
components offer the 3ppm worst case performance. The ADR43x
now has the MSOP8 option along with the SOIC8 option
which offers the 3ppm performance (B grade only).
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