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Metrology / Re: ADR1399 reference
« Last post by Andreas on Today at 03:39:40 pm »Hello,
update on my ADR1399 ageing reference board after having added 100uF to the output of the LDO voltage regulator on day 246.
(HEF4052 multiplexer has been used since day 190 / previously it was a MAX4052A)
Now I have a much lower standard devation especially on the metal can packages (from 0.25-0.3 ppm to 0.1 - 0.15 ppm)
But also the LS8-packages went down from 0.15-0.3 ppm to 0.1 - 0.17 ppm
And again the output voltage shifted. So I fear that I will have to repeat the ageing drift measurements with a new set of references.
With best regards
Andreas
update on my ADR1399 ageing reference board after having added 100uF to the output of the LDO voltage regulator on day 246.
(HEF4052 multiplexer has been used since day 190 / previously it was a MAX4052A)
Now I have a much lower standard devation especially on the metal can packages (from 0.25-0.3 ppm to 0.1 - 0.15 ppm)
But also the LS8-packages went down from 0.15-0.3 ppm to 0.1 - 0.17 ppm
And again the output voltage shifted. So I fear that I will have to repeat the ageing drift measurements with a new set of references.
With best regards
Andreas