LM45CIM3X

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Not For New Designs
Sensor Type:	Analog, Local
Sensing Temperature - Local:	-20°C ~ 100°C
Sensing Temperature - Remote:	--
Output Type:	Analog Voltage
Voltage - Supply:	4 V ~ 10 V
Resolution:	10mV/°C
Features:	--
Accuracy - Highest (Lowest):	±3°C (±4°C)
Test Condition:	25°C (-20°C ~ 100°C)
Operating Temperature:	-40°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3

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Temperature Sensors – Analog and Digital Output

Temperature sensors with analog and digital outputs monitor temperature, and are used for a wide range of industrial, medical, and consumer applications. The LM45CIM3X is one of these sensors, offering high accuracy temperature measurements and a wide operating range from -40 to +125°C. This article will cover the LM45CIM3X’s application field and working principle.

Application Field

The LM45CIM3X combines a SMD thermopile, a miniature thermistor, and an integrated preamplifier in a single TO-92 package. It is used in a wide range of temperature measurement applications because of its low power consumption and wide operating range. This sensor can be used for applications as varied as measuring temperature and humidity in industrial processes, home thermostats, car engines, outdoor environment, medical equipment, and much more. Additionally, the LM45CIM3X’s flexible output allows it to be used with both analog and digital systems.

Working Principle

The thermopile, located at the base of the LM45CIM3X, is a thin-film structure that absorbs radiation and converts it into electricity. The energy generated is then passed through a preamplifier so that the voltage output can be read by the measuring device. The thermal energy is also measured by a miniature thermistor, located near the top of the sensor. The thermistor measures the temperature of the environment using the voltage generated by the thermistor. The voltage from the thermistor and the thermopile are then combined to provide a more accurate reading of the temperature.

Calibration

In order to ensure accurate readings, the LM45CIM3X must be calibrated before use. This process involves calibrating the thermopile and thermistor to make sure the raw readings are consistent and repeatable. If the sensor is incorrectly calibrated, the readings can be accurate within certain temperatures, but inaccurate outside of this range. The calibration procedure varies by manufacturer, but in general, it involves setting the temperature range of the sensor, and then adjusting the thermistor and thermopile to match the temperature readings.

Conclusion

The LM45CIM3X is a versatile temperature sensor with both analog and digital outputs. It can be used for a variety of applications, including industrial and medical uses, as well as home thermostats and outdoor monitoring. Additionally, it requires calibration to ensure accurate readings, and the calibration process can vary by manufacturer. With its wide range of uses and accurate readings, the LM45CIM3X is a reliable choice for temperature monitoring.

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