[sdiy] Temperature Compensated Exponential Converter Using SSM2164

[Antti Huovilainen]

On Sun, 6 Sep 2009, David G. Dixon wrote:

>> Better yet try something designed for this, like a bandgap or buried
>> zener.  For example, the REF02C gives you +5V at 20ppm/C typical,
>> max. 65ppm/C.  Bandgap ref. diodes give you similar stability, e.g.
>> the ZRB500 will give you typ. 15ppm/C.
>
> Neil, this is the first I've ever heard of these parts!

Even the lowly TL431 has a typical tempco of 40ppm/C while costing 
pennies. Little enough that it's worthwhile to replace every rail derived 
voltage with one derived from TL431 or other reference.

Antti

"No boom today. Boom tomorrow. There's always a boom tomorrow"
   -- Lt. Cmdr. Ivanova