Overview

Features and Benefits

  • ±200 g measurement range
  • 160 Hz to 2560 Hz user selectable bandwidth with four-pole antialiasing filter
  • Selectable oversampling ratio
  • Adjustable high-pass filter
  • Ultra low power
    • Power can be derived from a coin cell battery
    • 28 µA at 2560 Hz ODR, 3.3 V supply
    • Low power, wake-up mode for low g activity detection
    • 1.7 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
  • Ultra low power event monitoring detects impacts and wakes up fast enough to capture the transient events
  • Adjustable, low g threshold activity and inactivity detection
  • Wide operating voltage range: 2.5 V to 3.5 V
  • Acceleration sample synchronization via external trigger
  • SPI digital interface and I2C interface format support
  • 12-bit output at 100 mg/LSB scale factor
  • Wide temperature range: −40°C to +105°C
  • Small, thin, 3 mm × 3.25 mm × 1.06 mm package

Product Details

The ADXL371 is an ultra low power, 3-axis, ±200 g microelectromechanical system (MEMS) accelerometer that consumes 28 μA at a 2560 Hz output data rate (ODR). The ADXL371 does not power cycle its front end to achieve its low power operation and therefore does not run the risk of aliasing the output of the sensor.

In addition to its ultra low power consumption, the ADXL371 enables impact detection while providing system level power reduction. Two additional lower power modes with interrupt driven, wake-up features are available for monitoring motion during periods of inactivity. In wake-up mode, acceleration data can be averaged to obtain a low enough output noise to trigger on low g thresholds. In instant on mode, the ADXL371 consumes 1.7 μA while continuously monitoring the environment for impacts. When an impact event that exceeds the internally set threshold is detected, the device switches to normal operating mode fast enough to record the event.

High g applications tend to experience acceleration content over a wide range of frequencies. The ADXL371 includes a four-pole, low-pass antialiasing filter to attenuate out of band signals that are common in high g applications. The ADXL371 also incorporates a high-pass filter to eliminate initial and slow changing errors, such as ambient temperature drift.

The ADXL371 provides 12-bit output data at a 100 mg /LSB scale factor. The user can access configuration and data registers via the serial peripheral interface (SPI) or I2C protocol. The ADXL371 operates over a wide supply voltage range and is available in a 3 mm × 3.25 mm × 1.06 mm package.

APPLICATIONS

  • Impact and shock detection
  • Asset health assessment
  • Portable Internet of Things (IoT) edge nodes
  • Concussion and head trauma detection

Product Lifecycle icon-recommended Pre-Release

This product is new and engineering validation may still be underway. Quantities may be limited and design specifications may change while we ready the product for release to production.

Evaluation Kits (1)

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards Pricing displayed is based on 1-piece.
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.