On 9/14/2012 8:04 PM, Fred Schneider wrote:
> Is the heater from a LM399 regulated, so it stayes at 85 degrees or
> is it just drawing an vast amount of current like a lightbulb ? So if
> it gets hotter around the LM the heater temp stays the same ? ... > I
just building a refrence with it and If it is not regulated i want
> to feed it through a current source
The datasheet shows heater current to be inversely proportional to
ambient temperature, so there's some level of regulation. I'd think that
trying to force a constant current wouldn't be significantly different
than not driving the heater at all (which is just the special case of
constant current = 0).
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