[sdiy] wow! this is neat!

[Ian Fritz]

Interesting. It might be usable for expo converter stabilization. If 
nominal room temperature corresponds to 1/2 the full resistance, then one 
step in resistance per two degrees in temperature gives a tempco of 3900 
ppm/K. This could be trimmed to 3300 ppm/K with a series metal film 
resistor. The chip could be operated from +/- 2.5 V supplies and could be 
the lower leg of a divider right at the transistor base.

I think you should try it!

   Ian



At 11:55 PM 3/24/2002, Michael Ruberto wrote:
>http://pdfserv.maxim-ic.com/arpdf/DS1847.pdf
>
>apparently you can make a lookup table to change the resistance depending 
>on temperature. it is programmable and non-volatile to boot which means 
>you can set it and forget it. this sounds interesting for use in 
>temperature stable VCO's and such but are 2 degree increments sufficient 
>for that?
>
>also, the power supply range for the device is 3Vdc-5.5Vdc and the voltage 
>through it's resistors cannot be above the supply... hmmm that sucks.