Tag Archives: diagram

Seg 2: Features of temperature sensor LM35

  1. Be familiar with temperature sensor

According to the output signal modes, it can be divided into 3 types: digital temperatures, logic output temperature, and analog temperature. In such experiment, the LM35 series sensors is a precise integrated circuit temperature sensor on the development of LM135. Its output voltage is proportional to the centigrade temperature linearly.

Thus the LM35 make interfacing to readout or control circuitry especially easy. The device is used with single power supplies, or with plus and minus supplies. As the LM35 draws only 60 μA from the supply, it has very low self-heating of less than 0.1°C in still air. The LM35 is rated to operate over a −55°C to +150°C temperature range, while the LM35C is rated for a −40°C to +110°C range (−10° with improved accuracy). The LM35 series is available packaged in hermetic TO transistor packages, while the LM35C, LM35CA, and LM35D are also available in the plastic TO-92 transistor package. The LM35D is also available in an 8-lead surface-mount small outline package and a plastic TO-220 package.


Calibrated Directly in Celsius (Centigrade) temperature sensors, with an output voltage linearly

Linear + 10 mV/°C Scale Factor proportional to the Centigrade temperature. Thus the

0.5°C Ensured Accuracy (at +25°C) LM35 has an advantage over linear temperature

Rated for Full −55°C to +150°C Range sensors calibrated in ° Kelvin, as the user is not

Suitable for Remote Applications required to subtract a large constant voltage from the output to obtain convenient Centigrade scaling. The

Low Cost Due to Wafer-Level Trimming LM35 does not require any external calibration or

Operates from 4 to 30 V trimming to provide typical accuracies of ±¼°C at

Less than 60-μA Current Drain room temperature and ±¾°C over a full −55°C to

+150°C temperature range. Low cost is assured by

Low Self-Heating, 0.08°C in Still Air trimming and calibration at the wafer level. The low

Nonlinearity Only ±¼°C Typical output impedance, linear output, and precise inherent

Low Impedance Output, 0.1 W for 1 mA Load calibration of the LM35 make interfacing to readout or control