BMA180

BMA180 Digital, triaxial acceleration sensor Bosch Sensortec General description The BMA180 is an ultra high performance digital The BMA180 is highly configurable in order to give the triaxial acceleration sensor, aiming for low power designer full flexibility when integrating the sensor consumer market applications. into his system. All features can be set by software via the digital interface. Here the user can choose The BMA180 allows high accurate measurement of between an I²C and an SPI (4-wire) interface mode. accelerations in 3 perpendicular axes and thus senses tilt, motion, shock and vibration in cell phones, handhelds, computer peripherals, man-machine interfaces, virtual reality features and game controllers. BMA180 target applications ff Navigation (INS / Dead Reckoning) Technical data ff High accurate tilt detection Sensitivity axes (e.g. tilt compensated compass) Measurement range ff Pointing and menu scrolling (switchable via SPI / I²C) ff Display profile switching (portrait / landscape) Sensitivity (calibrated) ff Gaming BMA180 x / y / z ±1g, ±1.5g, ±2g, ±3g, ±4g, ±8g, ±16g 1g: 8192LSB/g 1.5g: 5460LSB/g ff Drop detection for warranty logging 2g: 4096LSB/g ff Shock detection 3g: 2730LSB/g ff Step-counting 4g: 2048LSB/g 8g: 1024LSB/g Sensor operation The BMA180 represents a new generation of digital 16g: Resolution acceleration sensors with a unique performance and (±2g range) feature set within 3 mm x 3 mm x 0.9 mm standard LGA package. (switchable 12 bit option) Nonlinearity ±0.15% FS (±2g range) Zero-g offset (ex-factory) Zero-g offset Key features BMA180 ±15mg ±5mg (after offset fine tuning) Zero-g offset ±0.5mg/K ff All parameters and features user programmable temperature drift ff 7 user programmable g-ranges and 10 selectable Noise density bandwidth settings 512LSB/g 14bit  0.244mg 150µg / √Hz Bandwidth low pass ff Low-power consumption (switchable high pass ff Ultra-low-power self-wake-up mode via SPI/I²C) band pass ff User programmable interrupt engine Digital input / output ff 0g offset regulation and in-field offset re-calibration Supply V DD 1.62 ... 3.6V voltages V DDIO 1.20 ... 3.6V with ultra-high accuracy ff SPI (4-wire) / I²C interface Current consumption ff RoHS compliant, halogen-free Temperature range 10Hz ... 1200Hz 1Hz 0.2 ... 300Hz SPI & I²C, interrupt pin 650µA -40°C … +85°C 2 Bosch Sensortec BMA180 BMA180 Pin configuration (top view) One of the key elements of the BMA180 is the intelligent interrupt engine that gives the hard- and software DNC designer full control. Various motion detection scenarios can be identified by the BMA180 and signaled to the system via a simple interrupt pin. By using the digital serial interface, the exact details of the motion event that triggered the interrupt can be read-out. Following motion detection use case scenarios are supported by the interrupt engine: DNC 1 VDD 2 VSS 3 INT 4 CSB 5 ff Any-motion (slope) detection ff Tap sensing 12 11 DNC 10 VDDIO BMA180 (top view) 6 9 SDI 8 SDO 7 SCK DNC ff Low-g / high-g detection ff Data-ready with sample skipping option ff Self-wake-up Pin Name Function The interrupts can be conveniently configured by the No. user and thus perfectly support the integration of the 1 DNC Do not connect BMA180 into the user’s system environment. 2 VDD Analog supply voltage 3 VSS Ground Another important feature of the BMA180 acceleration 4 INT Interrupt output sensor is the power management module. This module 5 CSB SPI chip select 6 DNC Do not connect 7 SCK Serial clock 8 SDO Serial data output 9 SDI Serial data in /out 10 VDDIO Digital interface power supply 11 DNC Do not connect 12 DNC Do not connect allows for optimizing the sensor’s power consumption in-line with the specific user requirements. Thus, it is not necessary to operate the sensor at full power for all application scenarios all the time. For some use cases the power consumption drastically shrinks to just a fraction of what would be required in full performance mode. Moreover this feature of the BMA180 allows for an intelligent system power management   and thus significant reduction of the whole system’s power consumption. In particular, this helps increasing battery life-time of any kind of mobile device. Headquarters Bosch Sensortec GmbH Gerhard-Kindler-Strasse 8 72770 Reutlingen · Germany Telephone +49 7121 3535  9 00 Fax +49 7121 3535  9 09 contact@bosch-sensortec.com www.bosch-sensortec.com Specification subject to change without notice Doc.-Number: BST-BMA180-FL000-03 / Version_1.3_072010 © 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.