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hello sir,
   i am using lm35dz for temp. mapping but i can not get mv in o/p. so what is the proper circuit to measure it.  

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I don't think you connected the grounds, Dave.
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With a 5V analogue reference, you should get about two counts (5 / 1024 = 4.88mV / count) per degree on an analogue input pin.
If you need to measure temperature below zero Celsius, you'll need to offset the negative voltages.
« Last Edit: September 14, 2009, 04:45:22 am by AWOL » Logged

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