This causes a voltage across the resistor R1 that is proportional to the absolute temperature, and is almost linear across the range. This means it has one-tenth of the current density, since the same current is going through both transistors. There are two transistors in the block diagram above - one has ten times the emitter area of the other. 01V/☌ it draws only 60 micro amps and possesses a low self-heating capability. It does not require any external calibration or trimming, and maintains an accuracy of +/-0.4☌ at room temperature and +/-0.8☌ over a range of 0☌ to +100☌. The LM35 generates a higher output voltage than thermocouples and may not require the output voltage to be amplified. The LM35 is a precision integrated circuit (IC) temperature sensor whose output voltage is directly proportional to the temperature (10 mv/ ☌).
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