Tiny triaxial accelerometer has on-board converter

8 September 2004 Electronics Technology Security Services & Risk Management

Oki claims it has developed the world's thinnest three-axis accelerometer module, the ML8950, by integrating the sensor chip with the control IC. In addition to detecting the triaxial (x, y and z) acceleration (±3 g), the three-axis accelerometer module can also detect inclination and impact shock as well as measure the degree of inclination and vibration. It outputs the signal in a digital format. With micromachined technology, using 'silicon on insulator' wafers, Oki has managed to develop a module that combines high shock survivability with a 1,4 mm thin film and small size sensor chip. The control IC chip is equipped with a signal amplification circuit, a control circuit, an analogue-digital converter and a temperature compensating circuit. In addition, it is the first three-axis accelerometer module to be equipped with a digital interface. This removes the need for an ADC on the equipment and simplifies integration of the module into digital equipment because it can be directly connected to the CPU.

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