MMA6900KQ

Series:	Automotive, AEC-Q100
Packaging:	Tube
Part Status:	Obsolete
Type:	Digital
Axis:	X, Y
Acceleration Range:	±3.5g
Sensitivity (LSB/g):	291
Sensitivity (mV/g):	--
Bandwidth:	1.2kHz
Output Type:	PCM, SPI
Voltage - Supply:	3.15 V ~ 5.25 V
Features:	Temperature Sensor
Operating Temperature:	-40°C ~ 105°C (TA)
Mounting Type:	Surface Mount
Package / Case:	16-QFN Exposed Pad
Supplier Device Package:	16-QFN-EP (6x6)

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Introduction

MMA6900KQ is a motion-sensing accelerometer manufactured by the renowned sensing technology provider Murata Manufacturing Company. It is a 3-axis accelerometer with user-programmable frequency range from 0.5 Hz to 10 kHz, a maximum output voltage of ± 2.2 V and a sensitivity of 1.25 mV/g. It is designed for use in all kinds of applications, such as motion-sensing, vibration analysis, sound monitoring and capture, portable devices, and robotics. This article will discuss the applications of the MMA6900KQ and its working principle.

Applications

MMA6900KQ is a versatile accelerometer. Its frequency range and output voltage are adjustable, making it suitable for a wide range of applications. In home automation, MMA6900KQ can be used to detect motion in a room. With its internal high-sensitivity accelerometer, the device is able to detect minute changes in acceleration and can be set to trigger an alarm when the threshold is crossed. It can also be used in home security systems, where it can detect intruders moving in the house.In automotive applications, MMA6900KQ can be used in the suspension system to detect and monitor vibration levels. It can be used to detect irregularities in road conditions, and adjust the suspension accordingly. In automotive safety applications, it can be used to detect crashes and activate the airbags. MMA6900KQ can also be used in mobile phones. Its precise sensing capabilities enable it to detect slight hand movements, such as tilting and rotation, which allows for effective navigation and control of the phone. It can also be used to detect motion and vibrations, and can be used in gaming devices to detect motion for gaming purposes. In industrial applications, MMA6900KQ can be used to detect instabilities in machines. Its output voltage can be used to control relays to stop the machine from functioning in order to prevent accidents. It can also be used to monitor vibration levels to ensure smooth operation.

Working Principle

The MMA6900KQ uses an internal MEMS (micro electro-mechanical systems) accelerometer. The device consists of two parts: a proof-mass and a seismic mass. The proof mass is a mass which is managed by the accelerometer and is attached by four electrical springs to seismic masses which are connected to the surface of the chip. The charge pins are placed on opposite sides of the seismic masses. When an acceleration acts on the device, the proof mass will move towards the side with the higher charge, causing an instability which will be measured.This motion is detected by four sensing elements, which are placed on opposite sides of the seismic mass, and measure the current flowing through the charge pins. The sensing elements then output a voltage proportional to the acceleration applied on the device. This voltage can then be used to trigger alarms or to control relays to stop a machine.

Conclusion

The MMA6900KQ is a versatile accelerometer which can be used in a wide variety of applications, from home automation to automotive and industrial applications. Its internal MEMS accelerometer allows for precise sensing, and its adjustable frequency range and output voltage make it suitable for different types of applications. As such, it is an ideal choice for motion-sensing and vibration monitoring.

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