alternative Pin for vref

[skimask]

And before the original posters asks...
Do a search when you have problems with displaying negative temperatures. Plenty of working code examples around here for dealing with the DS1820.

[ruijc]

Thanks guys,

the ds18b20 is a good idea.
The problem is the temperature range. I need a sensor that can measure up to 150ºC at least ( no negative readings required ).

The LM35 can go that far. But not the ds18b20

.