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appended answer 246298 as supplemental
Dave Tweed
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precision voltage reference for multimeter

First post, be easy on the newbie. I'm trying to throw together a simple precision voltage reference based on the 5v LT1236. Seems to me the chip effectively has 4 pins, input, output, GND, and trim. I assume I don't connect the other pins at all. Can I leave the trim pin disconnected if I want a straight 5v reference? Probably not that simple...do I need filtering capacitors? How to I decide what size? I like to think I'm familiar with a decent portion of electrical theory, but explaining to me like I'm an elementary schooler couldn't hurt..

Sorry for so many questions, I figure all those questions could be answered in a quickie by almost anyone haha.


Should have started with a more common chip. I looked at the LM4040 datasheet, which made me realize I didn't understand the regulator was basically a zener diode. (And I didn't know enough about zener diodes) Previously I had not questioned how the IC actually operates. (Which would have made this whole thing easier)

Aaron
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