Analog Devices Inc. ADXL380 3-Axis MEMS Accelerometers
Analog Devices ADXL380 3-Axis MEMS Accelerometers support selectable measurement ranges of ±4g, ±8g, and ±16g. The low-noise density and low-power 3-axis accelerometers feature industry-leading noise, allowing precision applications with minimal calibration. The ADXL380 accurately measures audio signals or heart sounds even in high-vibration environments.
The ADI ADXL380 multifunction pin names are only referenced by the relevant function for either the serial peripheral interface (SPI) or inter-IC (I2C) interface or by audio function (pulse density modulation (PDM), inter-IC sound (I2S), or time division multiplexing (TDM)). Additionally, the low power consumption of the ADXL380 offers many features to facilitate an actual system-level performance. These features incorporate a built-in micropower temperature sensor, single tap, double tap, and triple tap detection, and a state machine to prevent false triggering. Furthermore, the ADXL380 has conditions for external control of the sampling time and an external clock.
The ADXL380 has a 2.25V to 3.6V wide operating supply range (or 1.8V supply) and can interface, if required, to a host operating on a separate supply voltage. The device is housed in a 14-terminal, 2.9mm x 2.8mm x 0.87mm LGA package.
Features
- Ultralow noise density of 20µg/√Hz (XY) and 27µg/√Hz (Z)
- Low power consumption
- 340µA High performance
- 33µA Ultra-low power
- 4kHz Wide bandwidth
- <0.5dB Relative flatness with equalization
- <2dB Relative flatness without equalization
- Low latency group delay <110µs
- Digital features
- 16-bit ADC
- Multiprotocol serial interfaces of SPI or I2C
- Multiprotocol audio data output of I2S, TDM, and PDM
- Programmable LPF and HPF
- Data synchronous or asynchronous sampling
- 320-word output FIFO
- Built-in features for system-level power savings
- Single tap, double tap, and triple tap detection
- Activity and inactivity detection
- Configurable interrupt modes
- Integrated temperature sensor
- Voltage range options
- VS with internal regulators at 2.25V to 3.6V (or V1P8 at 1.8V)
- VDDIO of 1.14V to 3.6V (1.62V to 3.6V for full temperature range)
- Electromechanical self-test
- 10,000g mechanical shock survival
- RoHS compliant
- Operating temperature range of -40°C to +85°C
- 14-terminal, 2.9mm x 2.8mm × 0.87mm, LGA package
Applications
- Audio and active noise cancellation (ANC)
- Robotics
- Wearables and low-power motion detection
- Seismic imaging
- Condition-based monitoring
Associated Boards
Analog Devices Inc. EVAL-ADXL380 Evaluation Boards
Implemented as a PC-based solution for demonstrating the ADXL380 MEMS accelerometer.
Functional Block Diagram
