LM335AM/NOPB

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Temperature sensing devices come in various forms and can be broadly categorized into analog and digital output temperature sensors. One type that is commonly used is the LM335AM/NOPB, an analog output temperature sensor.

Application Field

The LM335AM/NOPB is a readily available and relatively inexpensive temperature sensor that is used in a variety of applications. It is a three-lead semiconductor device whose output voltage is proportional to the absolute temperature (Kelvin). It is commonly used in medical and industrial equipment, home appliances, automotive, telecommunications, and computing. It can also be used in consumer electronics, temperature-sensitive devices, and to detect the temperature variations, or thermal changes, of any given system.

Working Principle

The principle of operation of this device is based on the property of a thermistor material, which acts as a temperature sensor. A thermistor has a large negative temperature coefficient (NTC) resistance. This property allows the thermistor to resist an increasing current with a decreasing temperature. Therefore, the increase of current implies a decrease in the temperature of the thermistor. The LM335AM/NOPB provides an approximately 10 mV output for each Kelvin of change in temperature. An increase in temperature will cause a decrease in the output voltage and a decrease in temperature will result in an increase in the output voltage.

The device requires a regulated current source for operation, and can be powered with a DC range of 3 V to 40 V. It also works within the -40°C to 125°C temperature range, and is relatively immune to environmental changes. Furthermore, the voltage output range of the device is linear and is for the most part independent of temperature, humidity and pressure.

Industrial Applications

The LM335AM/NOPB is an ideal device for use in industrial applications where temperature measurements need to be taken from a range of different locations and environments. It can be used in chemical processes, quality control and manufacturing applications. It can also be used to monitor temperature in hot or cold rooms, monitoring of motors, as well as for monitoring systems where precise temperature readings need to be taken.

Automotive Applications

The LM335AM/NOPB can also be used in the automotive industry, where precise temperature readings need to be taken for engine and transmission performance. It can also be used to monitor oil and fuel temperature, as well as in environmental controls. The device can provide temperature readings in the range of -40°C (-40°F) to 125°C (257°F) for use in both internal combustion engines and for use in coolant temperature measurements.

Medical Applications

The LM335AM/NOPB is also useful in the medical industry, where accurate temperature measurements need to be taken. The device can be used to monitor the temperature of body fluids, such as blood and urine, as well as air temperature. It can also be used to monitor the temperature of clinical instruments. The device can measure temperature in the range of -40°C (-40°F) to 125°C (257°F).

Consumer Electronics Applications

The LM335AM/NOPB can be used in a variety of consumer electronics applications, such as to measure the temperature of air conditioners, refrigerators, or air handlers. It can also be used to monitor the temperature of electronic equipment or battery packs. It can be used in home theatre systems or personal computing systems, where temperature control and monitoring of the internal electronics is important.

Conclusion

The LM335AM/NOPB is a widely used temperature sensor with a variety of applications in the medical, industrial, automotive, and consumer electronics industries. It is a three-lead semiconductor device whose output voltage is proportional to the absolute temperature (Kelvin), and requires a regulated current source for operation. It can be used in processes where precise temperature measurements need to be taken from a range of different locations and environments.

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