LM35 temperature sensor is an electronic component that functions to alter the temperature of physical quantities in the form of a magnitude electrical voltage. LM35 temperature sensor has a parameter that each increase of 1 º C increase by 10mV of output voltage with a maximum limit of the sensor output is 1.5 V at a temperature of 150 ° C. For example, the design use LM35 temperature sensor we set the adc output reaches full scale when the temperature of 100 ° C, so that when the temperature is 100 ° C. The transducer output voltage (10mV / ° C x 100 ° C) = 1V.
Physical form LM35 temperature sensor
Although the LM35 temperature sensor voltage can reach 30 volts but given kesensor is at 5 volts, so it can be used with single power supply with the provision that the LM35 only require a current of 60 μA this means that LM35 has the ability to produce heat (self-heating) of sensors that can cause a low reading error is less than 0.5 º C at a temperature of 25 º C.
The following are the characteristics of the LM35 temperature sensor.
It has a temperature sensitivity, with linear scale factor between voltage and temperature of 10 mVolt / º C, so it can be calibrated directly in Celsius.
Has the accuracy or the accuracy of the calibration is 0.5 º C at a temperature of 25 º C as shown in Figure 2.2.
It has a maximum range of operating temperatures between -55 º C to +150 º C.
Working on a voltage of 4 to 30 volts.
Having a low flow of less than 60 μA.
Having low self-heating (low-heating) that is less than 0.1 º C in still air.
It has a low output impedance is 0.1 W for 1 mA load.
Having not linear only about ± ¼ º C.
