geobabu
Member level 2
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
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