AIS326DQ

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The AIS326DQ motion sensor is a three-axis accelerometer that is especially suited for dynamic measurements. This motion sensor is able to detect linear velocity, distance, angular position, and acceleration in three-dimensional space. With its low power consumption, a wide acceleration range, high sensitivity, and small footprint, the AIS326DQ is an ideal sensor for many applications.

The application field of this motion sensor can vary; from measuring the angular forces in motors and engines to detecting shock and acceleration in industrial machinery. It is also suitable for use in automotive applications such as air bags and crash protection systems, for measuring vibration in general applications such as HVAC, and in medical applications such as prosthetic force feedback systems and patient monitoring devices.

The AIS326DQ is built with a 16-bit analog to digital converter, allowing it to measure acceleration with a range of up to ±2g. It also provides a SPI interface for communication with a microcontroller, giving the user full control over the behaviour of the device. The AIS326DQ has a built-in filter module, allowing it to be used in dynamic applications as well as in higher frequency measurements.

The working principle of the AIS326DQ lies in its measuring of capacitance. Two capacitors are built into the device, and each can sense acceleration in a respective direction. When the device gets accelerated, its capacitance changes proportionally, which can be measured by the microcontroller as a change in voltage. This process is explained further in terms of the details of the design of the device. The capacitors are of a particular structure, where two contact electrodes are of the same size and have the same distance between each other (fixed capacitance). Furthermore, between these electrodes an extended capacitor is added, which gives the device a ratio of fixed capacitance and variable capacitance. By measuring the voltage delta between these two capacitors, the acceleration of the AIS326DQ motion sensor can be determined.

In summary, the AIS326DQ motion sensor is a three-axis accelerometer designed for dynamic measurements, with low power consumption, a wide acceleration range, high sensitivity and small footprint. It is suitable for many applications, and works by sensing the change in capacitance that follows from acceleration.

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