Temperature Sensor Chips

Temperature sensor chips are semiconductor dies or packages that have built-in temperature sensors. Temperature sensor chips are employed in controlling temperatures of various electric and electronic instruments. A temperature sensor chip infers temperature by featuring some changes in physical characteristic of electronic equipments. There are many different types of temperature sensors. Examples include thermocouples, resistance temperature devices (RTDs), infrared radiation sensors, bimetallic devices, liquid expansion devices, and change-of-state sensors. A temperature sensor chip protects equipment from high temperatures, which may damage the equipment. Thermoelectric thermometers, which use thermocouples are used in measuring temperatures. Resistance temperature detectors operate on the principle of changes in electrical resistance of pure metals. They are also characterized by a linear positive change in resistance with the temperature. Other temperature sensor chips are also commonly available.

There are several principles on which temperature sensor chips function. Infrared radiation sensor chips are based on the heating effect of infrared radiations. Change of state due to heating is detected by change-of-state sensor chips. An RTD interface temperature chip is more accurate and more linear than thermocouple and is generally much more costly and slow responding. An RTD interface temperature chip is able to sense temperatures with extreme repeatability and low drift error from -200 °C to +850° C. A temperature semiconductor is produced in the form of ICs. The fundamental design of a temperature semiconductor results from the fact that semiconductor diodes have temperature-sensitive voltage and current characteristics. A temperature IC can be analog or digital and both have several variations. The use of an IC temperature sensor is limited to applications where the temperature is within a – 55 °C to 150 °C range. The measurement range of an IC temperature sensor may be small as compared to that of thermocouples and an RTD interface temperature chip, but they have several advantages. For example, they are small, accurate, and inexpensive. With the higher level of integration now feasible, a digital IC temperature sensor can report both local and remote temperatures, monitor other system parameters, control fans, or warn when a specific temperature is exceeded. A computer temperature sensor helps in maintaining an appropriate environment inside a computer for proper functioning of all the hardware and protects it from being damaged. Temperature sensor chips are designed and manufactured according to various industrial specifications.

Temperature sensor chips are used in many applications. Some examples include personal computers, air conditioners, refrigerators, water heaters, microwaves, hot-wire anemometers, industrial instrumentations, and laboratory-quality measurements. Temperature sensor chips continue to evolve, providing a varied array of functions, features, and interfaces.


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  1. guru

    Sensor Interface Chips

    Sensor interface chips are used as interfaces to sensors and other devices. The input at the interface collects data from the sensor and the output of the interface sends the data to a computer or other suitable device. IC is an acronym for integrated circuit. Sensor interface chips are integrated circuits (IC) that may also provide signal compensation and temperature correction in a variety of sensors. A sensor interface IC chip is used in many industries, including automotive, robotics, manufacturing, and medical applications.

    Sensor interface chips may be used in many types of sensors and sensing devices, including accelerometers, strain gauges, piezoresistive pressure sensors, load cells, thermistors, and other bridge-type sensors. Sensor interface and excitation IC chips are often self-calibrating, which enables them to get high accuracy data from sensors that may not be ideal. Basic sensor interface chips typically include sensor-excitation circuitry, a programmable gain amplifier, and an analog output. Other types of sensor interface chips include other components, such as digital-to-analog converters (DAC), analog-to digital converters (ADC), electrically-erasable programmable read-only memory chips (EEPROMs), and other components to manage temperature drift. A sensor IC chip also can perform signal conditioning such as gain and offset adjustment and linearity correction.

    Sensor interface chips that are used in automation systems typically use an actuator sensor interface (AS-i) protocol for industrial networking. The AS-interface (AS-i) is a network system for the lower field range of the automation level. It is suitable for networking binary actuators and sensors. The use of a special integrated circuit (IC) allows AS-i to be integrated with small devices in a cost-effective manner. The AS-i protocol is an effective alternative to hard wiring devices, since sensors and actuators are connected to the manufacturing machinery with one cable. This protocol is used in a multitude of automated machinery, such as elevators and conveyors, production lines, luggage carousels, and process control valves. The AS-i protocol is particularly useful in a sensor interface chip that controls safety or emergency stop mechanisms.