I'm looking for multiyear data from precision voltage references from initial power on which includes time-date, temperature and voltage. Relative humidity would also be nice if it is available.
I am a retired PhD level oil industry research scientist. I spent a number of years heavily involved in the mechanics of materials. I also spent several years working on sparse L1 pursuit (aka basis pursuit) solutions to inverse problems involving the 1D heat equation as it describes 1D fluid flow in porous media which is important to understanding the behavior of shallow reservoirs after fracking. The aging curve for references appears to be of that general form so I'd like to take a crack at seeing how accurately I can forecast the aging drift. Prior experience and testing solutions of the heat equation indicate that one can make good predictions for a period equal to the length of the prior history. So if anyone has multiyear data and is willing to share the first half of the series with me I'll see what I can do. It would be helpful though, to have the full series for a few references with long histories so I can test myself before submitting the results for general scrutiny. In considering integrated circuit device construction, it seems likely that both the aging drift and the voltage hysteresis caused by thermal excursions are related to the different coefficients of expansion of gold, aluminum and silicon at the wirebond. In particular, I suspect thermoviscoelastoplastic deformation as the mechanism. However, I have not seen a photomicrograph of an LTZ1000 reference die showing the bonding details. If anyone knows of such I'd be grateful for a link. For reference, Feynman demonstrated thermoviscoelastic deformation at the Challenger hearing in his famous C clamp and ice water experiment. In the case of a voltage reference one must also consider plastic deformation to be able to account for a permanent change in the value. Thanks, Reg _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com and follow the instructions there.
