EPCOS has developed T5300—a 2.2x2.6x0.9mm calibrated and temperature-compensated pressure sensor designed for measuring absolute pressures from 300mbar to 1200mbar. The device provides a 14-bit resolution at the serial digital interface. It has a low power consumption of only 2µA in sleep mode and <2mA while operating, and requires a supply voltage of 2.7V to 5.5V. This makes it particularly suitable for battery-powered devices. Data transfer is according to the I2C and SPI protocols.
The T5300 requires no further calibration. This benefits developers of navigation equipment and mobile phones, for example, who wish to accurately determine altitude above sea level with the aid of air pressure measurements. Together with a GPS-determined location, the altitude measurement permits precise 3D positioning. Applications include navigation with 3D maps for vehicles and pedestrians as well as in open terrain. It also enables position information accurate to within a single story of a building for emergency calls from mobile phones.
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