MMA5112KWR2

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Motion sensors are a broad category of devices that measure changes in physical position, motion and orientation. Accelerometers are accelerative motion and vibration sensors that measure and indicate the acceleration, velocity and inclination of a vibrating object.

The MMA5112KWR2 accelerometer is a surface mount, low voltage device that is used in measuring acceleration. It is most commonly used in mobile, consumer, and professional audio and video equipment, as well as gaming devices. The device features a small size, low power consumption, low cost, and stable performance.

This accelerometer is capable of measure linear acceleration in the range of -10g to +10g. It is kitted with a switchable low pass filter for elimination of high frequency noise. The sensor provides a serial digital output, which is converted into an analog voltage. The MMA5112KWR2 accelerometer also offers automatic power management features such as low power mode, sleep mode and standby modes.

The working principle behind this accelerometer is the piezo-resistance effect. This effect has been seen in various materials and describes the property of some substances, primarily metals, where there is an increase in electrical resistance due to applied mechanical stress. The piezo-resistance effect is used in this accelerometer to measure changes in acceleration. The accelerometer relies on a sensing element, a beam of semiconductor material, and the piezoresistive effect.

The sensing element is made up of a bridge of four identical resistors. When acceleration applies a force in any direction, two of the resistors are stressed on one side, while the other two are stressed on the other side. This creates an imbalance in the bridge and a voltage is generated across the device. This voltage is transferred to the output pins of the device and is converted to digital data, which is then transmitted to a microcontroller. In this way, acceleration can be measured.

In addition to its piezoresistive effect, the device also offers other features that make it attractive for specific applications. It is resistant to shock, vibration and electromagnetic interference. It also offers automatic gain control, which allows the device to automatically adjust its sensitivity to changing vibration or acceleration levels. This accelerometer also has built-in temperature compensation and offers a low power standby mode, allowing it to remain in operation for extended periods of time.

The MMA5112KWR2 accelerometer is an excellent choice for applications that require an economical and reliable accelerometer. It is used in a variety of applications, including inertial measurement, industrial automation, robotics, car navigation, and gaming devices. It is an ideal device for those who need to measure changes in acceleration in a small, cost-effective device.

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