Sensing acceleration in a space-constrained end product may result in the tradeoff of another feature if the accelerometer takes too much space. To avoid the conflict, STMicroelectronics introduced three-axis accelerometers in 2×2 mm packages. The tiny sensors have a quite a few features
of their own.
With full-scale ranges of ±2g/±4g/±8g/±16g, the LIS2DH and LIS2DM accelerometers include 4D/6D orientation detection and two programmable interrupt signals for motion detection, free fall and other conditions. The sensors also incorporate power saving features to improve battery life in portable applications that include power-down and sleep modes and a FIFO (first-in first-out) memory block for smarter power management.
The difference between the two sensors is the LIS2DH has more programmable sensitivity adjustments, a typical zero-g offset accuracy of ±40 mg versus ±100 mg for the LIS2DM and higher self-test output capabilities.
For more information about STMicroelectronics LIS2DH and LIS2DM triaxial accelerometers, click LIS2DH or LIS2DM.