Bosch Sensortec, Akustica

BMA280/BMA255 – for consumer electronics Bosch Sensortec launches triaxial MEMS acceleration sensors up to 14 bit resolution Now available in 2 x 2 mm LGA package

  • Detects acceleration forces as low as 0.25 milli-g
  • Integrated FIFO buffer and advanced interrupt engine
  • Complete portfolio of 6 to 14 bit sensors in 2 x 2 mm now available
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  • January 10, 2012
  • Bosch Sensortec, Akustica
  • Press releases

press release

The new triaxial acceleration sensors BMA280 and BMA255 from Bosch Sensortec feature 14 bit and 12 bit resolutions respectively – the norm up to now has been 10 bit. With this product extension Bosch Sensortec is the only manufacturer in the world to offer a complete acceleration sensor product portfolio in 2 x 2 mm package size. The new sensors even measure very small changes in acceleration of as low as 0.25 milli-g. Currently no other 2 x 2 mm acceleration sensor features such high sensitivity while maintaining an exceptionally low noise level of only 120 micro-g/vHz and 150 micro-g/vHz respectively. The 14 bit and 12 bit resolutions place great demands on the integrated electronics, yet the sensors require only 130 micro amps even at maximum data rate. In power-saving mode, at reduced data rate, the power consumption even drops to below 10 micro amps.

Dr. Frank Melzer, CEO of Bosch Sensortec, states that this latest product innovation proves again that Bosch is the world’s leading MEMS sensor manufacturer: “The fact that these sensors are the smallest size available on the market, have the lowest power consumption and low noise levels, demonstrates Bosch’s undisputed leadership in terms of MEMS technology.”

Advanced interrupt engine
Compared with existing acceleration sensors in the 2 x 2 mm series, the BMA280 and the BMA255 have an enhanced interrupt engine. The integrated interrupt engine enables them to automatically identify specific motion patterns. Previously the interrupt engine was able to recognize tapping on the housing of a mobile device, detect falling of a device or the lifting of a cell phone from a desk. Now, both types of sensors feature the additional pattern “no motion”: this means they can detect whether the device has stopped moving for a definable period of time. The energy management system of a mobile device can use this information to switch off high-performance functions until the acceleration sensor signals a new motion.

Another new feature is a FIFO buffer. It enables the sensor to buffer measurement data independently until it is required by the system. This reduces the application processors data polling frequency and hence reduces the system’s power consumption.

Manufactured on 200 mm wafers
The new sensors, already in series production, are manufactured in Bosch’s 200 mm wafer fab in Reutlingen. This new wafer fab was set up at an investment of more than 600 million euros and complements Bosch’s existing 150 mm wafer fab. Both fabs are used in the manufacture of integrated circuits (IC) and micromechanical devices (MEMS) for use in automobile technology and in consumer electronics.

 Acceleration sensors in the 2 x 2 mm series from Bosch Sensortec
  BMA280 BMA255 BMA250 BMA222 BMA220
 Measuring ranges
±2 g, ±4 g, ±8 g, ±16 g
 Digital resolution 14 Bit 12 Bit 10 Bit 8 Bit 6 Bit
 maximum resolution
 (in the measuring range ±2 g)
 0.244 Milli-g 0.98 Milli-g 3.91 Milli-g 15.63 Milli-g 62.5 Milli-g
 InterfacesSPI (3- or 4-wire) and I2C
 Number of interrupt pins 21
 Permissible operating temperature -40 °C ... +85 °C

Bosch Sensortec GmbH is a fully owned subsidiary of Robert Bosch GmbH that is dedicated to delivering a complete portfolio of microelectromechanical systems (MEMS) sensors and solutions that enable consumer electronics to be connected. Bosch Sensortec develops and markets a wide portfolio of MEMS sensors and solutions tailored for smartphones, tablets, wearable devices and IoT (Internet of Things) applications.

The product portfolio includes 3-axis acceleration, gyroscope and geomagnetic sensors, integrated 6- and 9-axis sensors, environmental sensors, and a comprehensive software portfolio. Since its foundation in 2005, Bosch Sensortec has emerged as the MEMS technology leader in the markets it addresses. Bosch has been both a pioneer and a global market leader in the MEMS sensor segment since 1995 and has, to date, sold more than 7 billion MEMS sensors. Bosch sensors can be found in three out of four smartphones worldwide.

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The Bosch Group is a leading global supplier of technology and services. It employs roughly 375,000 associates worldwide (as of December 31, 2015). The company generated sales of 70.6 billion euros in 2015. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiaries and regional companies in some 60 countries. Including sales and service partners, Bosch’s global manufacturing and sales network covers some 150 countries. The basis for the company’s future growth is its innovative strength. Bosch employs 55,800 associates in research and development at 118 locations across the globe. The Bosch Group’s strategic objective is to deliver innovations for a connected life. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.”

Further information is available online at and,

PI7562 - January 10, 2012

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