[volt-nuts] Homebrew LTZ1000 reference?

[J. Forster]

Vishay precision resistors are very, very good in my experience. You might
try Vishay directly as a source, even for small quantities. I used to get
them that way.

-John

==============


> At 10:47 AM 11/19/2009, gsteinba52 at aol.com wrote...
>>          Linear Technology has an application note on this very
>> subject:
>>
>>cds.linear.com/docs/Application%20Note/an86f.pdf
>>
>>Devour the whole app note
>
> Schematic's fine for what it is, but they call for $40/ea resistors,
> probably special order from a distributor. (VISHAY VHP-100 0.1%, ~0 ppm
> tempco, 5 of 'em) which I would like to avoid the expense of...but you
> can get Xicon 10ppm (288-0805 series) ones for <$1 from stock.
>
> Beyond the basic app note is getting an accurate voltage (10 V?)
> referenced to the low accuracy LTZ1000 (it's extremely stable, but not
> very accurate). Again, the app note would have you use a custom
> resistor array (and even that won't get you accuracy, unless special
> ordered, custom matched to each LTZ1000 - $$$$).
>
>
>
>
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