Ultralow Power Accelerometer

The ADXL372 micropower high-g MEMS accelerometer from Analog Devices is for long-period monitoring of the physical condition of high-value assets.

Aw 120366 1705np Analogdevices

With its extremely low power capabilities, the unit targets Internet of Things (IoT) solutions where shock and impact on an asset during storage, transit, or use would adversely affect its function, safety, or reliability. Such assets include materials in shipping and storage containers, factory machinery, and battery powered products where there may be lengthy quiet periods punctuated by spontaneous, severe impacts. Towards this end, the sensor has an “instant on” feature and can wake up immediately to acquire the entire waveform, which significantly reduces standby power drain. The standby current requirement of less than two microamps typically yields years of operation from a single small battery. As part of a remote edge-node device in an IoT application, the sensor allows transient events to be captured and categorized by a localized processor beforehand by being sent to the cloud or other data center via a wireless link. Keeping the analysis localized saves power and time, and prevents unnecessary transfer of data for an event that is actually insignificant. The sensor features a bandwidth of 3200 Hz and dynamic range of ±200 g, which make it suitable for a diverse set of asset — and even personnel — health-monitoring applications including monitoring of concussions for indication of traumatic brain injury in both athletes and military personnel.

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