On 09/14/2012 07:04 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 ?
It is regulated to a nominal 90C. When power is first applied heater current spikes to typically above 120 mA. After a few seconds it drops to a 10 - 40 mA (depends on heater voltage level and environment). -- Bob Smither, PhD Circuit Concepts, Inc. ========================================================================= "The beauty of the second amendment is that it will not be needed until they try to take it." --Thomas Jefferson ========================================================================= [email protected] http://www.C-C-I.Com 281-331-2744(office) -4616(fax)
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