LM35DZ/LFT1

Series:	--
Packaging:	Bulk
Part Status:	Active
Sensor Type:	Analog, Local
Sensing Temperature - Local:	0°C ~ 100°C
Sensing Temperature - Remote:	--
Output Type:	Analog Voltage
Voltage - Supply:	4 V ~ 30 V
Resolution:	10mV/°C
Features:	--
Accuracy - Highest (Lowest):	±1.5°C
Test Condition:	25°C
Operating Temperature:	0°C ~ 100°C
Mounting Type:	Through Hole
Package / Case:	TO-226-3, TO-92-3 (TO-226AA)
Supplier Device Package:	TO-92-3

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Introduction

Temperature sensors are instruments used to measure the temperature of a given object or environment. Generally, these sensors convert a temperature-dependent physical quantity into an electrical signal for further processing. Temperature sensors are classified by the type of electrical signal they generate, such as analog and digital output sensors. LM35DZ/LFT1 is an analog output sensor developed by National Semiconductor, aimed at precise temperature measurements in medical and industrial applications. This article will discuss the application field and working principle of LM35DZ/LFT1.

Application Field of LM35DZ/LFT1 Temperature Sensors

LM35DZ/LFT1 is designed and manufactured for precisely measuring temperature in critical environments. The device is specifically intended for use in medical devices, industrial process control systems, and safety and automation systems.In the medical industry, LM35DZ/LFT1 is widely used in therapy applications such as patient monitoring and medical imaging. The device is typically used to measure body temperatures and environment-related factors such as pressure, humidity, and air quality. Its precision and accuracy ensure reliable results. The device is also used in industrial applications such as factory process control, HVAC, and automotive and aerospace design. Its ability to deliver precise temperature measurements in critical environments makes LM35DZ/LFT1 a favored choice in these applications.

Working Principle of LM35DZ/LFT1

LM35DZ/LFT1 is a 3-pin analog temperature sensor based on a band gap reference. The device faithfully senses the temperature and converts it into an analog electrical signal proportional to the temperature. The temperature range that can be measured by the device is -40 degree Celsius to +150 degree Celsius. The device utilizes a digital, Silicon-on-Insulator (SOI) Process, providing a reliable and accurate temperature output.Firstly, the device\'s internal band gap reference voltage is generated. This reference voltage sets the internal operating point of the device to a fixed temperature. Then, the internal transistor amplifies the band gap reference voltage and converts it into an analog output voltage. The output voltage is proportional to the temperature in a linear fashion, with an output voltage of 10mV/ degree Celsius.Lastly, the signal is amplified by an external circuit and converted into a digital signal for further processing. The amplified output voltage is then fed into an analog-to-digital converter (ADC), which then converts the analog signal into a digital signal. This digital signal can then be used for further analysis and processing.

Conclusion

In conclusion, the LM35DZ/LFT1 is a reliable and accurate analog output temperature sensor designed for use in critical applications. It is designed with a digital Silicon-on-Insulator (SOI) Process, providing a reliable and accurate temperature output over the -40 degree Celsius to +150 degree Celsius range. The device is ideal for use in medical applications such as patient monitoring and medical imaging. It is also used in industrial applications such as HVAC, factory process control, and automotive and aerospace engineering.The device operates by utilizing an internal band gap reference voltage to generate a voltage proportional to the temperature. This signal is then amplified by an external circuit and converted into a digital signal for further processing. The amplified output voltage is then fed into an analog-to-digital converter (ADC), which converts the analog signal into a digital signal for further analysis and processing.

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