Hi,
Please help me regarding the problem facing with LM35 (DZ) temperature Sensor interfacing. Normally the LM35 provides an o/p @ 10mV/°C .
I had connected a LM35, V+ to 5V, and with a DMM , Vout pin shows around 2.7V ~ 2.85V, while I am expecting around .26 ~ .29mV @ room temperature. Other thing is when the temperature increases , the voltage is gradually decreasing and vice versa. When I connected a 1K resistor across, Vout & GND, the 2.7V ~ 2.85V range reduced to ~ .54, its decreases as temperature rises.
Also I didn't connect the o/p to any other device like opamp/ADC.
I got the same results with another sensor also. I think, something wrong over here. Please help me to find out the issue.
Thanks in Advance.
Geo