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Characteristics Sensor LM35

LM35 sensor works by changing the temperature scale into the amount of voltage. Ideal voltage that comes out of the LM35 has a ratio of 100 ° C is equivalent to 1 volt. This sensor has a self heating (self heating) of less than 0.1 ° C, can be operated using a single power supply and can be connected to an interface (interface) control circuit that is very easy.
– Has a temperature sensitivity, with linear scaling factor between the voltage and temperature of 10 mVolt / ºC, so it can be calibrated directly in centigrade.
 – Has the accuracy or calibration accuracy is 0,5ºC at a temperature of 25 ° C as shown in Figure 2.2.
 – It has a maximum range of operating temperature range of -55 ºC to +150 ºC.
 – Working at a voltage of 4 to 30 volts.
 – Has a low current of less than 60 uA.
 – Having low self-heating (low-heating) of less than 0.1 ° C in still air.
 – Has a low output impedance is 0.1 W for 1 mA load.
 – Have nonlinearities only about ± ¼ ºC.
image Graph characteristics of the LM35 temperature

image

LM IC 35 does not require calibration or adjustment from the outside because of its accuracy until approximately a quarter of a degree Celsius at room temperature. Term sensors ranging from – 55 ° C to 150 ° C, IC LM35 is very easy to use, functioned as the control of the power supply indicator display split. IC LM 35 can be energized 60 μ A of supplay so that the heat generated by itself is very low less than 0 ° C at room temperature.

To detect the temperature used an LM35 temperature sensor that can be calibrated directly in C (Celsius), it functioned as a basic LM35 temperature sensor. The privilege of IC LM 35 is:
 – Calibration in units of degrees Celsius.
 – linearity of +10 mV / ºC
 – Accuracy 0.5 º C at room temperature.
 – Range +2 º C – 150 º C.
 – Operated at 4 V power supply – 30 V.
 – Current flowing less than 60 uA