From the depth of 750 meters underground to the top of Mount Everest, smart phones and other portable devices will be able to determine altitude changes in their locations in the near future. Consumer electronics and portable devices MEMS sensor suppliers STMicroelectronics (NYSE: CODE) :STM) successfully implemented this concept with the latest MEMS (Micro Electro Mechanical System) pressure sensors.
The new LPS001WP is a miniature pressure sensor that uses innovative sensing technology to accurately measure pressure and altitude. The product is available in an ultra-lightweight, low-profile package and is ideal for smartphones, sports watches, various portable devices, weather stations, and automotive and industrial applications.
Benedetto Vigna, general manager of MEMS, sensors and high-performance analog products at STMicroelectronics, said: “MEMS technology allows us to continuously develop next-generation sensor products that can measure various physical parameters, such as linear motion sensors, angular motion sensors, and pressure sensors. Magnetic sensors, etc. At the same time, the manufacturing costs of these innovative products are continuously decreasing, and the precision of measurement is also constantly increasing. The use of these sensors is far beyond our imagination."
One of the primary target applications for this product is the advanced portable GPS positioning device. The traditional GPS positioning function can only determine the 2D position of the device. After integrating the LPS001WP pressure sensor, the same device will be able to provide accurate 3D positioning; for example, when a GPS navigation mobile phone with pressure sensor integrated sends an emergency call for assistance, firefighters, medical ambulance personnel or police personnel will be able to receive The incoming call signal determines the exact location and floor of the accident.
The LPS001WP has a pressure detection range from 300 mbar to 1100 mbar, which corresponds to an air pressure between -750 m and +9000 m above sea level. A pressure change of a minimum of 0.065 mbar can be detected, which corresponds to an altitude of 80 cm. This product uses ST's unique VENSENS process to integrate the pressure sensor on a single wafer, which not only saves wafer-to-wafer bonding processes, but also maximizes product reliability.
The pressure sensor in the LPS001WP detects pressure changes by means of a flexible silicon film that covers the air chamber (where the air gap is controllable and the pressure is already defined). Compared to conventional silicon microfabricated films, the new product's thin film is very small, and the built-in micromechanical stop structure prevents air pressure from damaging the film. This thin film includes a miniature piezoresistor whose resistance value changes as the external pressure changes. The pressure sensor monitors the changes in the resistance of the silicon thin film, corrects for variations in the temperature using a temperature compensation method, converts the detected change information into binary bits of data, and transmits the data to the device's host processor via an industry-standard I2C or SPI communication interface.
The new LPS001WP is a miniature pressure sensor that uses innovative sensing technology to accurately measure pressure and altitude. The product is available in an ultra-lightweight, low-profile package and is ideal for smartphones, sports watches, various portable devices, weather stations, and automotive and industrial applications.
Benedetto Vigna, general manager of MEMS, sensors and high-performance analog products at STMicroelectronics, said: “MEMS technology allows us to continuously develop next-generation sensor products that can measure various physical parameters, such as linear motion sensors, angular motion sensors, and pressure sensors. Magnetic sensors, etc. At the same time, the manufacturing costs of these innovative products are continuously decreasing, and the precision of measurement is also constantly increasing. The use of these sensors is far beyond our imagination."
One of the primary target applications for this product is the advanced portable GPS positioning device. The traditional GPS positioning function can only determine the 2D position of the device. After integrating the LPS001WP pressure sensor, the same device will be able to provide accurate 3D positioning; for example, when a GPS navigation mobile phone with pressure sensor integrated sends an emergency call for assistance, firefighters, medical ambulance personnel or police personnel will be able to receive The incoming call signal determines the exact location and floor of the accident.
The LPS001WP has a pressure detection range from 300 mbar to 1100 mbar, which corresponds to an air pressure between -750 m and +9000 m above sea level. A pressure change of a minimum of 0.065 mbar can be detected, which corresponds to an altitude of 80 cm. This product uses ST's unique VENSENS process to integrate the pressure sensor on a single wafer, which not only saves wafer-to-wafer bonding processes, but also maximizes product reliability.
The pressure sensor in the LPS001WP detects pressure changes by means of a flexible silicon film that covers the air chamber (where the air gap is controllable and the pressure is already defined). Compared to conventional silicon microfabricated films, the new product's thin film is very small, and the built-in micromechanical stop structure prevents air pressure from damaging the film. This thin film includes a miniature piezoresistor whose resistance value changes as the external pressure changes. The pressure sensor monitors the changes in the resistance of the silicon thin film, corrects for variations in the temperature using a temperature compensation method, converts the detected change information into binary bits of data, and transmits the data to the device's host processor via an industry-standard I2C or SPI communication interface.
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