MMA5124KW

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Motion sensors are devices that measure and track movement in 3D space, detecting the 3 orthogonal axes of linear and rotational motion: acceleration, velocity and angular velocity. Among these devices are accelerometers, which measure the acceleration along the three axes. In this regard, the MMA5124KW is an advanced accelerometer with advanced operational characteristics.

Introduction

The MMA5124KW is an integrated capacitive micro-machined acceleration sensor developed by Kionix. It is a cost effective solution for applications requiring the measurement of acceleration along three orthogonal axes. This sensor is a low power, low noise, low cost solution for consumer and industrial applications.

Application Fields

The MMA5124KW accelerometer is used in a variety of applications which require the measurement of acceleration along three orthogonal axes. These applications include but are not limited to game controllers and interface devices, smartphones, laptops, tablets, point-of-sale devices, vehicle dynamics and automation control systems, robotics, human-machine interfaces, industrial process control, vibration monitoring systems, navigation systems, and home security systems.

Working Principle

The MMA5124KW accelerometer is an integrated micro-machined MEMS device which combines the sensing element with the signal conditioning circuitry into a single package. The sensing element consists of a capacitive sensing structure which responds to accelerative motions along the three orthogonal axes: X, Y, and Z. The capacitive sensing structure consists of four sensing elements, two fixed and two moveable plates, which respond to acceleration along each axis. The capacitance between the two moveable plates is changed as a result of the acceleration, which can be measured using the signal conditioning circuitry.

The signal conditioning circuitry consists of an operational amplifier, a bandgap reference voltage, and all the necessary filters and controller circuitry to convert the raw capacitance measurement from the sensing element into a conditioned voltage output. The voltage signal is then digitized using an analog-to-digital converter, and then transmitted to the host processor for further analysis.

Conclusion

The MMA5124KW accelerometer is an advanced, low power, low cost solution for applications which require the measurement of acceleration along three orthogonal axes. This accelerometer combines the sensing element and the signal conditioning circuitry into a single package, making it a cost effective solution for consumer and industrial applications. The wide range of applications for this accelerometer makes it a versatile and useful tool for a variety of applications.

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