> -----Original Message-----
> From: Kyrre Aalerud [SMTP:kreature@C2I.NET]
> Sent: Tuesday, February 25, 2003 11:32 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [PIC]: [EE]: NTC sampling via R/C-network and jitter...
>
> Hmm, I'll switch to a tantalum.  I've found I can do with a much smaller
> cap
> anyway, and the 16 bit accuracy didn't change results.
>
>
Don't use a tantalum, they have a very poor temperature coefficient, nearly
as bad as an electrolytic (around 5% change for 50 degreeC change)  For
critical applications you can buy caps with almost zero tempco, but a
polystyrene cap (and some ceramic caps) should give good performance at as
reasonable price.  Check the datasheets before using!

Mike


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