MMA6813BKW

Series:	Automotive, AEC-Q100
Packaging:	Tube
Part Status:	Obsolete
Type:	Digital
Axis:	X, Y
Acceleration Range:	±50g
Sensitivity (LSB/g):	9.766
Sensitivity (mV/g):	--
Bandwidth:	--
Output Type:	SPI
Voltage - Supply:	3.135 V ~ 5.25 V
Features:	--
Operating Temperature:	-40°C ~ 105°C
Mounting Type:	Surface Mount
Package / Case:	16-QFN Exposed Pad
Supplier Device Package:	16-QFN (6x6)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

MMA6813BKW Application Field and Working PrincipleMMA6813BKW is a monolithic micromachined accelerometer which belongs to the motion sensors - accelerometers family. It is designed to measure static or dynamic acceleration in three directions. This accelerometer produced by Freescale Semiconductor Inc., is a reliable and low cost three-axis accelerometer intended for applications such as tilt detection or motion detection. It has been used in numerous industries, ranging from automotive, consumer, medical, and industrial.The MMA6813BKW is a low-power consumer-grade accelerometer. It has a signal range of ±6 g and noise typically less than 60 µg/Ö Hz. Its maximum current draw is only 5.5 mA and its power down current is 0.1 mA. It utilizes analog technology and provides output signals in voltages proportional to the acceleration experienced in each axis.The main physical characteristic of the device consists of its small size; it measures 5 x 5 x 0.9 mm. And it operates in temperatures from - 40°C to 85°C. The sensor is typically used along with a microprocessor for system control and communication, as it offers low-power consumption and physical robustness.The working principle of the MMA6813BKW is based on a mems accelerometer in which the static capacitance changes in response to a change of acceleration. To measure acceleration in every direction, three resonators are arranged in three orthogonal directions in the plane of the chip. The unbalanced static capacitance results in an oscillating signal with a frequency depending on the acceleration in each direction.To measure the acceleration, the MMA6813BKW utilizes the well-known capacitive MEMS accelerometer principle. It works by measuring the deflection and movement of the oscillating structures in the chip caused by acceleration in three directions. The static capacitance changes according to the displacement and the changing differential capacitance is used to measure the acceleration.The output of the accelerometer is analog and provides real-time acceleration information, for each axis. The sensing element consists of a spring suspended, capped beam in which the acceleration experienced by the beam triggers MEMS dynamics. This dynamic deflection is linearly proportional to only the acceleration in the vertical direction. The output from the sensor is un-amplified, so an external amplifier or microcontroller is needed to amplify or process the signals. The output voltage range of the sensor is from 0 to 3.3V for acceleration values from -6 to 6g.The MMA6813BKW has been gaining significant interest among applications such as automotive, consumer, medical, and industrial. Applications of the accelerometer range from inertial navigation systems, seismic sensors and industrial process control. It has also been used to detect and monitor the movement of head and body of individuals in car crashes, vehicles’ vibration and stability, and human pose estimation and fall detection, embedded navigation systems. To conclude, the MMA6813BKW motion sensor - accelerometer, due to its compact size, low consumption and high linearity - has become an increasingly popular choice in numerous industries. It helps to design a low-cost and reliable detection system capable of sensing acceleration in three orthogonal directions. Its analog output makes it suitable for integration with an Analog to Digital converter and with a microprocessor for system-level control.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description