A MEMS motion sensor leap

Bosch Sensortec claims a MEMS motion sensor leap, smallest BMA220 g-sensor in LGA housing
Triaxial digital sensor, 2 x 2 mm, reduces surface area 55% over current 3 x 3 LGA housings,
automatically recognizes specific movements, needs no external microcontroller for signal
analysis.
-- Control Engineering, 1/28/2010

Bosch Sensortec introduces the smallest BMA220 g-sensor in LGA housing."Bosch Sensortec
introduces the smallest BMA220 g-sensor in LGA housing."The BMA220 digital sensor from Bosch
Sensortec is the smallest digital acceleration sensor in LGA housing in the world â€' it
measures 2 mm x 2 mm x 0.98 mm, including LGA housing.

Bosch Sensortec says that in 2007 it was first to successfully pack sensors in LGA housings
 measuring only three millimeters â€' until then, the standard had been four millimeters.
Miniaturization continues: The new generation of 2 x 2 LGA housings occupies 79% less surface
area on a circuit board than that required for the 6 x 6 sensor that marked Bosch Sensortec's
market debut in 2005, the company says.

Smaller, more functions

BMA220, already delivered in large quantities to OEM customers, is a fully fledged, triaxial
 g-sensor with digital data output, four programmable measuring ranges from ±2 g to ±16 g,
 and integrated evaluation electronics for recognizing specific motion patterns. Originally
designed for pedometers (step counters), Bosch Sensortec wrote algorithms that shortened
development time for the end device. Other applications include 3D spatial orientation in
mobile telephones, PDAs and game controllers, as well as targeted reactions to movements, such
as the ability to mute a ring tone by tapping twice on the mobile phone.

On-sensor ASIC saves battery power

The evaluation electronics integrated in the sensor obsoletes the need for intensive signal
 evaluation by the host application's microcontroller. This greatly reduces energy use in the
mobile device, which significantly extends battery life. BMA220 algorithms for motion
recognition run internally on an ASIC, so the sensor can autonomously and automatically
distinguish between a random movement, a change in its spatial position, a single tap, double
taps, and between slow and fast changes in movement.

Customer can program motion recognition

The motion recognition parameters can be programmed by the customer. The sensor signals the
 availability of new data at the interrupt output; the sensor outputs them in conditioned form
to the digital interface. This means that end product developers can avoid complex raw 3 axis
 acceleration data from the internal micromechanical readings recorder.

Bosch Sensortec GmbH is a subsidiary of Robert Bosch GmbH, headquartered near Reutlingen to the
 south of Stuttgart (Germany). Bosch offers a wide selection of MEMS products â€' from pressure
 and acceleration sensors to yaw-rate sensors â€' many used in the automotive industry. Company
 says its annual production is more than 200 million sensors.
www.bosch-sensortec.com

Raiza Pernia
CI. V.-17.528.555
CRF

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