BMA250 Digital, triaxial acceleration sensor Bosch Sensortec General description Sensor operation The BMA250 is an advanced, ultra-small, triaxial, The BMA250 supports two modes of operation: low-g acceleration sensor with digital interfaces, 1) Streaming data mode: Acceleration data is directly aiming for low-power consumer electronics applica- read-out via the sensor’s digital interface and comput- tions. ed by a system µController, application processor or a The BMA250 allows measurement of accelerations base-band processor. in 3 perpendicular axes and thus senses tilt, motion, 2) Interrupt engine mode: Acceleration data is com- shock and vibration in cellular phones, handhelds, puted already within the BMA250 by the integrated, computer peripherals, man-machine interfaces, programmable interrupt engine. Depending on the virtual reality features and game controllers. programmable settings the integrated interrupt engine of the BMA250 signals the occurrence of certain events via the sensors` two interrupt pins. The corres- BMA250 target applications ponding registers of the BMA250 can easily be set and f Display profile switching (portrait/landscape, read-out via the digital sensor interface. face-up/face-down switching) f Flat detection BMA250 Technical data f Tap sensing function f Menu scrolling Digital resolution 10 bit f Gaming Resolution 3.9 mg f Advanced power management for mobile devices (in ±2g range) f Shock and free-fall detection Measurement ranges ±2 g, ±4 g, ±8 g, ±16 g f Step-counting (programmable) f Tilt compensation for electronic compass Sensitivity ±2 g: 256 LSB/g (calibrated) ±4 g: 128 LSB/g ±8 g: 64 LSB/g Sensor features ±16 g: 16 LSB/g With its size of only 2 mm x 2 mm the BMA250 Zero-g offset ±80 mg represents a new generation of digital accelerati- (over life-time) on sensors. The BMA250 integrates a multitude of Bandwidths 1000 Hz ... 8 Hz features that facilitate its use especially in the area (programmable) of motion detection applications, such as device ori- Digital inputs/outputs SPI & I2C, entation detection, gaming, HMI and menu browser 2x interrupt pins control. Featuring a full operation current consump- Supply voltage (V ) 1.62 … 3.6 V DD tion of only 100 µA the BMA250 is ideally suited for I/0 supply voltage (V ) 1.2 … 3.6 V DDIO mobile consumer electronic devices. In low-power Temperature range -40 … +85°C mode operation the current consumption can be Current consumption even further reduced by more than one order of f full operation 139 µA (@ 2 kHz data rate) magnitude. f low-power mode 7 µA (@ 40 Hz data rate) The BMA250 is highly configurable in order to give 1 µA (@ 1 Hz data rate) the designer full flexibility when integrating the sen- LGA package 2 x 2 x 0.95 mm3 sor into his system. Shock resistance 10.000 g x 200 µs

2 | Bosch Sensortec | BMA250 Following motion detection use case scenarios are Pin configuration (top view) supported by the BMA250 interrupt engine: ppiinn ##1122 f Data-ready (e. g. for processor synchronization) f Any-motion (slope) detection (e. g. for wake-up) ppiinn ##11 SSDDOO SSCCKK PPSS CCSSBB f Tap sensing (e. g. for tap-sensitive UI control) f Orientation change recognition (e. g. for portrait/ landscape & face-up/face-down switching) SSDDxx GGNNDD BBMMAA222225220 f Flat detection (e. g. for position sensitive ((ttoopp vviieeww)) switching) VVDDDDIIOO GGNNDDIIOO f Low-g / high-g detection (e. g. for shock and free-fall detection) ppiinn ##77 NNCC IINNTT11 IINNTT22 VV DDDDAA Interrupt parameters (e. g. switching angles and hysteresis settings for orientation change) can be configured by the designer and thus perfectly support Pin Name Function the integration of the BMA250 into the user’s system No. environment. 1 SDO SPI serial data output 2 SDA, I2C / SPI serial data input/ SDI, output System compatibility SDO The BMA250 has been designed for best possible fit into modern mobile consumer electronics devices. 3 V I/O supply voltage DDIO Besides the ultra-small footprint and lowest power 4 N.C. Not connected consumption, the BMA250 has very wide ranges for 5 INT1 Interrupt output #1 V and V supply voltages. An integrated self-test 6 INT2 Interrupt output #2 DD DDIO feature facilitates overall system reliability. 7 V Supply voltage DD 8 GND Ground I/O IO 9 GND Ground 10 CSB SPI chip select 11 PS Protocol select pin (0=SPI, 1=I2C) 12 SCK SCL (I2C serial clock) SCK (SPI serial clock) The BMA250 features I2C and SPI (3-wire/4-wire) dig- tal serial interfaces. Sensor parameters, like g-ranges or low-pass filter settings, and also all interrupt engi- ne settings can be easily programmed via the digital interfaces. Integrated interrupt engine One of the key elements of the BMA250 is the enhan- ced intelligent interrupt engine that gives the hard- and software designer full control. Various motion Headquarters detection scenarios can be identified by the BMA250 Bosch Sensortec GmbH and signaled to the system via two interrupt pins. The Gerhard-Kindler-Strasse 8 72770 Reutlingen · Germany interrupt sources can be freely mapped to either of Telephone +49 7121 3535 900 the two interrupt pins. Fax +49 7121 3535 909 contact@bosch-sensortec.com www.bosch-sensortec.com Data & Specification subject to change without notice Doc.-Number: BST-BMA250-FL000-01 / Version_1.1_012011 © 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 par- ties. BOSCH and the symbols are registered trademarks of Robert Bosch GmbH, Germany.