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Small footprint accelerometer can be set for either low-power or low noise

Date: 26/02/2017
A Small footprint and a flexible accurate new 3-axis MEMS accelerometer LIS2DW12 launched by STMicroelectronics’ allows multiple low-power and low-noise settings in a 2mm x 2mm x 0.7mm package.

LIS2DW12 has 16-bit output and can be set to prioritize low power consumption or low-noise performance, with five settings in either mode. A specific feature coupled with four settings in each mode save waking the system to check for data, and allow efficient single-byte transfers to reduce the system power consumption and extend the battery life. ST claims this device offers noise density down to 90µg/vHz which is at least 25% lower than similar devices in the marketplace, which improves the measurement accuracy in next-gen applications from healthcare, fitness, and gaming to industrial sensing and environmental monitoring.

By consuming a standby current of 50nA and 380nA in low-power mode at 1.6Hz Output Data Rate, the LIS2DW12 adds extremely less load on the battery. By operating with a supply voltage of 1.62-3.6V this device can help the system to operate from small coin or button cell batteries. Features that support system-level power savings include a 32-level FIFO, a built-in temperature sensor, and a programmable interrupt for freefall, wake up, activity/inactivity, 6D/4D orientation detection, and tap/double-tap detection.

Price and availability: Engineering samples of the LIS2DW12 are available now, and volume production will begin in Q1 2017. Budgetary pricing is from $0.75 for orders of 1000 pieces.