Kevin wrote...

>I just got a couple of LM34DZ temperature sensors,
>and was wondering if it is OK to hook the output
>directly to a PIC ADC pin ?

Sure it is.  If you use the PIC's ADC with VREF= 5 volts, that
will give you 5 millivolt resolution which corresponds to 0.5
degrees Fahrenheit.  Provided this resolution is enough for your
application, you're in business.

>I checked both datasheets,
>and saw a resistor in one diagram and an RC damper
>in another.

The resistor I think you're referring to is connected to a
negative supply voltage to allow the LM34's output to go slightly
negative and thereby indicate temperatures lower than zero
degrees F.

The damper, IIRC, is used if you're going to be operating the
LM34 out at the end of a cable.

Dave D.

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