BMC050 eCompass (6-axes electronic compass) Bosch Sensortec Introduction With leading-edge digital accelerometers and pres- Technical details sure sensors Bosch Sensortec is a well established supplier of MEMS sensors for the mobile world. BMC050 Digital interfaces Backed by Bosch’s huge technology and IP portfolio, Bosch Sensortec is now introducing the BMC050, 4 interrupt pins Current consumption regular mode 540 µA @10 Hz low power mode 190 µA @10 Hz a latest generation fully compensated electronic compass that delivers excellent performance in very small size. I²C, SPI (3/4wire) Supply voltage Supply voltage I/O 1.62 V ... 3.6 V 1.20 V ... 3.6 V The BMC050 allows for determining precise tilt-com- Operating temperature -40 °C ... +85° C pensated geomagnetic heading information and for Package (LGA type) 3 x 3 x 0.95 mm³ providing accurate acceleration sensor data. The BMC050 6-axes, digital eCompass comes in a Geomagnetic sensor small 3mm x 3mm x 0.95mm LGA package. It com- Measurement range prises Bosch Sensortec proprietary FlipCore geo- Resolution ± 1000 µT 0.3 µT magnetic sensing technology with Bosch Sensortec’s well-proven, leading edge MEMS sensor technology Acceleration sensor for the accelerometer. Stand-alone operation supported Resolution Programmable g-range 10 bit ±2g / ±4g / ±8g / ±16g Function The BMC050 eCompass measures the earth’s geoma- Zero-g offset gnetic field in three dimensions (3 axes) and it mea- Sensitivity tolerance ±80 mg ±4 % sures dynamic and static acceleration, and thus also the tilt of the sensor by the help of the accelerometer Target Applications (3 axes). The tilt information is required in situations The BMC050 provides accurate tilt-compensated where the geomagnetic sensor can not be held flat, orientation information for navigation (GPS i.e. parallel to the earth’s surface. enhancement / map rotation), for location based services (LBS) or augmented reality and in combina- By combining this output information of the BMC050 tion with a pressure sensor for indoor navigation. the eCompass software produces precise heading Due to its small footprint, its low power consump- information, independent from the orientation of the tion and its high level of functional integration, the device that the BMC050 is integrated in. BMC050 is ideally suited to fit into all kind of modern personal mobile devices, like mobile telephones, In addition to that, the accelerometer integrated within the BMC050 provides all the precision and functionality of Bosch Sensortec’s leading-edge 10bit digital accelerometer BMA250. tablet PCs, notebooks, portable media players, etc. 2 | Bosch Sensortec | BMC050 Integrated interrupt engine It includes automatic magnetic offset cancellation Acceleration sensor and accelerometer tilt-compensation. ff Data-ready (e. g. for processor synchronization) For more details on software features and licensing ff Any-motion (slope) detection (e. g. for wake-up) conditions, please contact your Bosch Sensortec ff Tap sensing (e. g. for tap-sensitive UI control) representative. ff Orientation change recognition (e. g. for portrait/ landscape & face-up/face-down switching) ff Flat detection (e. g. for position sensitive switching) ff Low-g / high-g detection (e. g. for shock and Pin configuration (top view) free-fall detection) 4 Geomagnetic sensor ff Overflow detection 5 ff Low-g / high-g threshold detection 6 Y eCompass software software supporting the BMC050 to provide high precision. Z 1 2 16 Pin 1 Mark 15 BMC050 7 8 Bosch Sensortec licenses proprietary leading-edge 3 14 13 9 10 11 12 X Axis orientation for geo-magnetic sensor + accelerometer ff Magnetic heading Axes orientation for geomagnetic sensor and accelerometer ff 3D device orientation ff Signal quality information ff In-use calibration Pin # Pin Name 1 INT2 Sensor Description Acc. Interrupt output #2 2 PS1 Acc. Protocol select #1 3 PS2 Mag. Protocol select #2 4 INT3 Mag. Interrupt output #3 5 CSB1 Acc. Chip select #1 6 CSB2 Mag. Chip select #2 7 GND Mag. + Acc. Ground 8 GND Mag. + Acc. Ground 9 DRDY Mag. Data ready 10 SDO Mag. + Acc. SPI: Data output 11 SDI Mag. + Acc. SPI: Data input, I2C: Data 12 GND Mag. + Acc. Ground 13 V DD Mag. + Acc. Supply voltage 14 V DDIO Mag. + Acc. I/O voltage 15 SCK Mag. + Acc. Serial clock 16 INT1 Acc. Interrupt output #1 Headquarters Bosch Sensortec GmbH Gerhard-Kindler-Strasse 8 72770 Reutlingen · Germany Telephone +49 7121 3535 9 00 Fax +49 7121 3535 9 09 email@example.com www.bosch-sensortec.com Data & Specification subject to change without notice Doc.-Number: BST-BMC050-FL000-00 / Version_1.0_102011 © Bosch Sensortec GmbH reserves all rights in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. BOSCH and the symbols are registered trademarks of Robert Bosch GmbH, Germany.
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