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Analog Devices Ultralow Power Accelerometer Enables Remote IoT Edge Nodes and Condition-Based Monitoring, evaluation kit available from Anglia

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Analog Devices have released a next-generation accelerometer designed for long-period monitoring of the physical condition of high-value assets. With its extremely low power capabilities, the ADXL372 micropower high-g MEMS accelerometer targets Internet of Things (IoT) solutions where shock and impact on a unit during storage, transit, or use would adversely affect its function, safety, or reliability.

Typical target applications include materials inside shipping and storage containers, factory machinery, and battery powered products where there may be lengthy quiet periods punctuated by spontaneous, severe impacts.

Unlike other comparable accelerometers in the market, this ultralow power MEMS sensor has an "instant on" feature and can wake up immediately to acquire the entire waveform, this feature significantly reduces the standby power drain of the sensor. The resulting low current requirement of less than two microamps while waiting for an impact typically yields years of operation from a single small battery when the sensor is used in a motion-activated system.

By using the ADXL372 MEMS accelerometer as part of a remote edge-node device in an IoT application, transient events can be captured and categorized by a localized processor beforehand by being sent to the cloud or other data centre via a wireless link. Keeping the analysis localized further saves power, time, and prevents unnecessary transfer of data for an event that is actually insignificant.

The wide bandwidth of 3200 Hz and dynamic range of ±200 g of the accelerometer make it an excellent fit for a diverse set of asset health-monitoring applications including monitoring of concussions for indication of Traumatic Brain Injury in both athletes and military personnel.

The ADXL372 is specified for operation over the -40C to +105°C temperature range, it joins the industry-leading ultralow power, low g ADXL362 MEMS accelerometer as part of ADI’s broader ultralow power portfolio of sensors. Both the ADXL372 and ADXL362 accelerometers interface seamlessly with the ultralow power ADuCM4050 microcontroller which is part of ADI’s series of IoT-optimized microcontrollers. Other leading-edge microcontrollers include the ADuCM3027 and ADuCM3029; all of these devices feature both active and hibernate modes with ultralow power demands, and target applications where power consumption, security, and robustness are key requirements.

Free Evaluation   
Key Features
  • ±200 g measurement range
  • 200 Hz to 3200 Hz user selectable bandwidth with 4-pole antialiasing filter
  • Selectable oversampling ratio
  • Adjustable high-pass filter
  • Ultralow power
    • Power can be derived from a coin cell battery
    • 22 μA at 3200 Hz ODR, 2.5 V supply
    • Low power, wake-up mode for low g activity detection
    • 1.4 μA instant on mode with adjustable threshold
    • <0.1 μA standby mode
  • Built in features for system level power savings
    • Autonomous interrupt processing without processor intervention
    • Deep embedded FIFO to minimize host processor load
  • Ultralow power event monitoring detects impacts and wakes up fast to capture transient events
  • Ability to capture and store peak acceleration values of events
  • Adjustable, low g threshold activity and inactivity detection
  • Wide supply range: 1.6 V to 3.5 V
  • Acceleration sample synchronization via external trigger
  • SPI digital interface and limited I2C interface format support
  • 12-bit output at 100 mg/LSB scale factor
  • Wide temperature range: −40°C to +105°C
  • Compact low profile 3 mm × 3.25 mm × 1.06 mm package
Data

Click below to view a brief overview of the ADXL372 MEMS accelerometer

The ADXL372 MEMS accelerometer is supported by the EVAL-ADXL372Z evaluation board.

ADI Board

This simple evaluation board allows quick evaluation of the performance of the ADXL372 ultralow power, 3-axis, digital output MEMS accelerometer. The EVAL-ADXL372Z is ideal for evaluation of the ADXL372 in an existing system because the stiffness and the small size of the evaluation board minimize the effect of the board on both the system and acceleration measurements.

Anglia are offering customers a FREE evaluation board and samples of the ADXL372 Ultralow Power MEMS Accelerometer from Analog Devices, please fill in the form below to register your interest now.

To register for a FREE Evaluation Board and Samples of the ADXL372 Ultralow Power MEMS Accelerometer from Analog Devices, please fill in the form below

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FREE samples for UK and Ireland customers only, subject to availability.

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