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MEMS motion sensor delivers analog output

Posted: 02 Apr 2009 ?? ?Print Version ?Bookmark and Share

Keywords:MEMS? motion sensor? accelerometer? output analog?

AS3990/91

STMicroelectronics has beefed up its portfolio of ultracompact, high-performance MEMS sensors with a 3-axis accelerometer with absolute analog output. Able to operate with any supply voltage in the range of 2.16V to 3.6V and extremely stable over temperature and time, ST's LIS352AX is suitable for motion-sensing applications in space- and cost-constrained battery-operated devices.

ST's newest 3-axis motion sensor has been designed to provide acceleration values in the form of absolute analog outputs. Taking advantage of internal regulated voltage, the measurements are insensitive to the typical variations in power-supply voltage that occur in battery-operated devices, such as cell phones and other portable devices. The device allows equipment manufacturers to save space and cost by connecting the sensor directly to the battery without a separate voltage regulator. In addition, the sensor also offers design flexibility, since it is compatible with any power supply voltage used in a given application.

The LIS352AX boasts high stability over a wide temperature range for both zero-g offset and sensitivity. With the offset drift (temperature variation) around 0.3mg/C, ST's new sensor is one of the most stable devices in the market, eliminating the need for further temperature compensation in the application.

Housed in an environment-friendly 3mm x 5mm x 1mm plastic package, the LIS352AX provides accurate output across a full-scale range of 2.0g. The device also operates at a very low noise level with minimized power consumption, which is especially critical in battery-operated portable systems.

Furthermore, the accelerometer's ultracompact robust design provides very high immunity to vibration and shock survivability up to 10,000g. Built-in self-test capability allows the customer to verify the functioning of the sensor after it has been assembled on board.

ST's MEMS accelerometers target a wide range of low-g applications across consumer and industrial market segments, including free-fall detection for data-integrity protection in HDDs, vibration monitoring and compensation, remote control, as well as motion user interfaces in mobile and gaming devices or portable media players.

Samples of ST's LIS352AX are available now, with volume production starting in June 2009. Unit pricing is $1.3 for quantities over 10,000 pieces a year.





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