[time-nuts] Linear voltage regulator hints...
kb8tq at n1k.org
Mon Dec 8 17:59:24 EST 2014
As with anything else it’s a matter of “what’s in your wallet”.
The parts you are after are called voltage references rather than voltage regulators. You can get them well down into the low ppm’s / C or lower. The cutoff is more a function of “do you want to spend $100 or not” rather than a specific level you simply can’t get to.
> On Dec 8, 2014, at 1:18 PM, Dan Kemppainen <dan at irtelemetrics.com> wrote:
> In playing with some oscillators and a GPSDO here, I think I'm seeing a voltage sensitivity issue.
> So, I started looking at the output voltage of various regulators vs. temp. Using standard LM/UA type linear regulators and some LDO's, they all appear to be pretty sensitive to temperature. (millivolt / few degrees Fahrenheit sort of sensitivity). Most of the datasheets seem to ignore temp sensitivity. Almost like they are so bad they don't want to publish it...
> Does anyone have hints on TO-220 or D-Pak type regulators that have really good temp coefficients and good line regulation? A few PPM/Deg C might be nice, if possible. Or am I into a 'roll you own' type design...
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