ADXL363

RECOMMENDED FOR NEW DESIGNS

Micropower 3-Sensor Combination Including Acceleration and Temperature

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Overview

  • All sensors sampled synchronously
    Up to 400 Hz ODR
    Samples can be synchronized to external trigger
  • Ultralow power
    1.95 μA at 100 Hz ODR, 2.0 V supply, all sensors on
    270 nA at 6 Hz motion activated wake-up mode
    10 nA standby current
  • 12-bit resolution for all sensors
    Acceleration scale factor down to 1 mg/LSB
    Temperature scale factor: 0.065°C/LSB (typical)
  • Built-in features for motion-based system level power savings
    Adjustable threshold sleep/wake modes for motion activation
  • Accelerometer, temperature sensor, and provision for third analog sensor input
  • Autonomous interrupt processing, without need for microcontroller intervention, to allow the rest of the system to be turned off completely
  • Deep embedded FIFO minimizes host processor load
    Awake state output enables implementation of standalone, motion activated switch
  • Wide supply and I/O voltage ranges: 1.6 V to 3.5 V
    Operates off 1.8 V to 3.3 V rails
    Power can be derived from coin cell battery
  • SPI digital interface
  • Small and thin 3 mm × 3.25 mm × 1.06 mm package

The ADXL363 is an ultralow power, three-sensor combination consisting of a 3-axis MEMS accelerometer, a temperature sensor, and an on-board analog-to-digital converter (ADC) input for synchronous conversion of an external signal. The entire system consumes less than 2 μA at a 100 Hz output data rate and 270 nA when in motion triggered wake-up mode.

The ADXL363 communicates via a serial port interface (SPI) and always provides 12-bit output resolution for all three sensors.

The ADXL363 temperature sensor operates with a scale factor of 0.065°C/LSB (typical). Acceleration and temperature data can be stored in a 512-sample multimode first in, first out (FIFO) buffer, allowing up to 13 sec of data to be stored.

In addition to the accelerometer and temperature sensor, the ADXL363 also provides access to an internal ADC for synchronous conversion of an additional analog input.

The ADXL363 operates on a wide 1.6 V to 3.5 V supply range, and can interface, if necessary, to a host operating on a separate, lower supply voltage. The ADXL363 is available in a 3 mm × 3.25 mm × 1.06 mm package.

APPLICATIONS

  • Home healthcare devices
  • Wireless sensors
  • Motion enabled metering devices

ADXL363
Micropower 3-Sensor Combination Including Acceleration and Temperature
ADXL363 Functional Block Diagram ADXL363 Pin Configuration
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