TMP302CQDRLRQ1 Sensors, Transducers

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Temperature Sensors - Thermostats - Solid State is an industry term for a type of temperature control and monitoring device that uses a solid-state material to measure and control temperature. The TMP302CQDRLRQ1 is a temperature monitoring device consisting of a NTC-thermistor and an integrated circuit (IC) for temperature sensing and regulating device. It is designed for use as temperature limit and monitoring switches.

Application Field

The TMP302CQDRLRQ1 is mainly used in domestic and commercial applications, HVAC installations, medical applications, often for sensing and regulating the temperature of any smart office and they are particularly suitable for refrigeration. The operating range is between -55°C and 125°C with a tolerance of ±2.5°C over the entire sensing range. The over-temperature protection range of the device is 145°C and the response time is within 4 seconds.

Working Principle

The main component of the TMP302CQDRLRQ1 is the NTC-thermistor. This thermistor is a two-terminal, temperature-sensing device that responds to changes in temperature. Its resistance varies with the ambient temperature by a predictable amount. The thermistor is connected to a signal conditioning circuit that takes the varying resistance and forms it into a proportional signal. The proportional signal then goes to the temperature sensing circuit, designated as the IC, which utilizes the signal for temperature sensing.

The IC is designed to detect when the temperature reaches or surpasses certain thresholds and either block or allow the flow of current through the system. Once the temperature passes a certain point, the flow of the current is interrupted until the temperature drops to a certain preset level. This type of monitoring system allows for quick and efficient temperature regulation without requiring the user to constantly adjust it.

Further, the TMP302CQDRLRQ1 also contains two hysteresis resistors in order to ensure stability. It help prevents the device from turning on and off too quickly and produces more reliable performance. Hysteresis resistors also help to reduce noise and minimize errors caused by contact bouncing, thermal noise, and other unreliable conditions.

In conclusion, the TMP302CQDRLRQ1 is a solid-state temperature monitoring and regulation device commonly used in domestic and commercial applications. Its main component is the NTC-thermistor and the IC to sense and regulate the temperature. Additionally, it contains two hysteresis resistors that facilitate stability and reduce noise and contact bouncing. Its operating range is between -55°C and 125°C with a tolerance of ±2.5°C over the entire sensing range.

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