3-axis high-g MEMS accelerometer for accurate impact, shock, and concussive detection

October 09, 2013 // By Graham Prophet
Analog Devices' ADXL375 200-g digital MEMS accelerometer claims more than twice the bandwidth at less than half the power consumption of competing sensors used to measure high-g events.

Analog Devices' ADXL375 3-axis, 200-g digital MEMS (micro-electro-mechanical systems) accelerometer has the highest bandwidth and lowest power in its class and continuously measures the duration and magnitude of impact or shock events within the full-scale range of ±200 g without saturation. The new sensor consumes 140 µA at a full bandwidth of up to 1.6 kHz, delivering more than twice the sampling rate of competing sensors at less than half the power. The ADXL375 is suited for low- and battery-powered wireless sensor networks used in concussion detection, transportation, asset tracking and other applications that are subject to sudden, high-magnitude forces.

The ADXL375 3-axis, 200-g MEMS accelerometer includes an integrated memory management system consisting of a 32-level FIFO (first-in, first-out) memory. The buffer memory includes low-power modes that can be used to set impact thresholds, store data and lower overall system power consumption by offloading those functions from the host processor.

The ADXL375 has been designed into the newest generation of the Blast Gauge, a body-worn blast detection system developed by BlackBox Biometrics. The device is currently deployed with U.S. Armed Forces to measure and record concussive event data that is then used for health and safety assessment. The device also utilises ADI's ADXL362 low-power, 3-axis MEMS accelerometer as part of an intelligent, continuously operational, motion-activated switch to increase battery life in the sealed environment.

Analog Devices; www.analog.com/ADXL375