LMT84QDCKRQ1

Series:	Automotive, AEC-Q100
Packaging:	Tape & Reel (TR)
Part Status:	Active
Sensor Type:	Analog, Local
Sensing Temperature - Local:	-50°C ~ 150°C
Sensing Temperature - Remote:	--
Output Type:	Analog Voltage
Voltage - Supply:	1.5 V ~ 5.5 V
Resolution:	5.5mV/°C
Features:	--
Accuracy - Highest (Lowest):	±2.7°C
Test Condition:	-50°C ~ 150°C
Operating Temperature:	-50°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	6-TSSOP, SC-88, SOT-363
Supplier Device Package:	SC-70

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Temperature Sensors - Analog and Digital Output

Temperature sensors are specialized devices that enable precise measurement of thermal conditions. Although there are several sensing principles employed in these devices, the most common is the use of thermistors. The LMT84QDCKRQ1 is one such example and is a high precision temperature sensor that features low-drift properties, fast start-up, and broad operating temperature range.

Overview of the LMT84QDCKRQ1

The LMT84QDCKRQ1 is a temperature sensing device from Texas Instruments which uses resistance measurements to measure the temperature. It employs a thermistor that senses temperature and relies on a voltage divider arrangement to derive an analog output voltage that is proportional to temperature.This device features a low-noise differential voltage amplifier, a low drift operational amplifier, and a voltage divider. It is capable of operating over a wide temperature range (from -25°C to +125°C). The device also features a fast warm-up time (1s) as well as a low-temperature coefficient of the resistance (2 μ/°C).

Application Fields of the LMT84QDCKRQ1

Given its features, the LMT84QDCKRQ1 has a wide range of potential applications. It is particularly suited for precisely measuring the temperature of water or other liquids, as well as for temperature compensation applications, such as in power supplies.The device can also be used to monitor the temperature of electronics and electrical systems, air conditioning systems, and industrial processes. It can also be used for over-temperature protection in the event of system malfunctions or excessive heat, and it can be used in medical equipment where temperature control is a key factor.

Working Principle of the LMT84QDCKRQ1

The LMT84QDCKRQ1 operates by utilizing an NTC thermistor as the temperature sensing element. It contains a voltage divider circuit, consisting of two resistors connected in series. One of the resistors is a fixed resistor, while the other varies depending on the ambient temperature, as the thermistor changes its resistance as a function of temperature.The output of the voltage divider is fed to an op-amp where it is amplified, and the amplified signal is then fed to the output terminals of the device. The output voltage is then proportional to the temperature, and can be used to accurately measure the temperature in the application.

Conclusion

The LMT84QDCKRQ1 is an excellent temperature sensor from Texas Instruments which is suited to a wide range of application fields. It uses an NTC thermistor as a sensing element to measure temperature, and employs a voltage divider circuit, which is then amplified by an op-amp. The device offers fast warm-up time, low-drift properties, and a wide operating temperature range, making it an ideal temperature sensing solution for use in various applications.

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