New low-power MEMS accelerometers

14 May 2008 Analogue, Mixed Signal, LSI

STMicroelectronics has added two new accelerometers to its ultra-compact portfolio of devices in 4 x 4 x 1,5 mm LGA packages, with full-scale range selectable between ±2 G and ±6 G for space-critical applications where high performance is required. The LIS244ALH two-axis accelerometer and LIS344ALH for three-axis applications operate at low power with high performance and high resolution in low-voltage and battery-operated systems. The devices' analog outputs provide direct measurements to external circuitry, and allow designers to optimise external filtering and analog/digital conversion. Output circuitry is factory calibrated for sensitivity and zero-G level, saving further recalibration when built into the end product. The devices also include an embedded self-test function that verifies both the MEMS sensor and the embedded electrical interface chip are working correctly, according to guaranteed specifications. The wide operating temperature range from -40°C to +85°C, combined with shock survivability up to 10 000 G, ensures robust performance when operated in a variety of consumer and ISM environments.

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