[volt-nuts] Trimming the LTZ1000 tempco
willvolts at gmail.com
Fri Oct 7 10:08:57 UTC 2011
> Or did I misunderstand something again?
Yes I did. And I had the same mistake with my previous calculations,
which explains the strange results.
Since you are an expert, an "LTZ1000 circuit description for dummies"
would be great.
The heater control is straightforward, but all the interactions in the
reference circuit seem not to be clear to me. And most likely there
are other dummies too.
2011/10/7, Bruce Griffiths <bruce.griffiths at xtra.co.nz>:
> There's little point in adding the tempco compensation resistor if you
> do that as your proposed connection essentially eliminates the
> additional correction provided by the resistor.
> There's no way of avoiding the sensitivity to the value of this resistor
> if this method of tempco trimming is used.
> However if a +50ppm/K LTZ1000 residual tempco (with the tempco trim
> resistor = 0) is typical, then the sensitivity will only be about 10% or
> so of that esstimated by Adreas.
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