temperature sensor interfacing with 8051


Posted on Feb 5, 2014

The LM35 series are precision integrated-circuit temperature sensor, whose output voltage is linearly proportional to the Celsius (Centigrade) temperature. The LM35 thus has an advantage over linear temperature sensorscalibrated in ° Kelvin, as the user is not required to subtract a large constant voltage from its output to obtain convenient Cent


temperature sensor interfacing with 8051
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igrade scaling. The LM35 does not require any external calibration or trimming to provide typical accuracies of ± °C at room temperature and ± °C over a full -55 to +150 °C temperature range. Low cost is assured by trimming and calibration at the wafer level. The LM35`s low output impedance, linear output, and precise inherent calibration make interfacing to readout or control circuitry especially easy. It can be used with single power supplies, or with plus and minus supplies. As it draws only 60 µA from its supply, it has very low self-heating, less than 0. 1 °C in still air. The LM35 is rated to operate over a -55 ° to +150 °C temperature range.




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