Bosch Sensortec – BMP280
BMP280 is an absolute barometric pressure sensor especially designed for mobile applications. The sensor module is housed in an extremely compact package. Its small dimensions and its low power consumption allow for the implementation in battery driven devices such as mobile phones, GPS modules or watches.
As its predecessor BMP180, the BMP280 is based on Bosch’s proven piezo-resistive pressure sensor technology featuring high accuracy and linearity as well as long term stability and high EMC robustness.
Numerous device operation options offer highest flexibility to optimize the device regarding power consumption, resolution and filter performance. A tested set of default settings for example use case is provided to the developer in order to make design-in as easy as possible.
Features:
- Package:
- 8-Pin LGA with metal
- 2.0 x 2.5 x 0.95 mm³
- Operation range (full accuracy):
- Pressure: 300 … 1100 hPa
- Temperature: 0…+65°C
- Supply voltage VDD:
- 1.71 … 3.6V
- Interface:
- I²C, SPI
- Average current consumption (typ.) (1Hz data refresh rate):
- 2.74µA (ultra low power mode)
- Average current consumption in sleep mode:
- 0.1 µA
Technology and specification
The sensor module is housed in an extremely compact 8-pin metal-lid LGA package with a footprint of only 2.0 × 2.5 mm² and 0.95 mm package height. Its small dimensions and its low power consumption of 2.74 μA @1Hz allow the implementation in battery driven devices. The emerging applications of in-door navigation, health care as well as GPS refinement require a high relative accuracy and a low TCO at the same time.
The BMP280 is perfectly suitable for applications like floor level detection since the sensors features excellent relative accuracy of ±0.12 hPa, which is equivalent to ±1m difference in altitude, and an offset temperature coefficient (TCO) of only 1.5 Pa/K (equivalent to 12.6cm/K). As the successor of the widely implemented BMP180, which initially enabled barometric pressure measurement in high volumes in mobile handsets in 2011, BMP280 achieves high performance in all applications requiring a precise pressure measurement. At the same time BMP280 features more application flexibility, new filter modes and SPI interface besides the shrinkage of footprint by 63% with respect to BMP180.
Applications:
- Enhancement of GPS navigation (e.g. time-to-first-fix improvement, dead-reckoning, slope detection)
- Indoor navigation (floor detection, elevator detection)
- Outdoor navigation, leisure and sports applications
- Weather forecast
- Health care applications (e.g. spirometry)
- Vertical velocity indication (e.g. rise/sink speed)
