ADXL312 3-Axis, ±1.5 g/±3 g/±6 g/±12 g Digital Accelerometer

The ADXL312 is a small, thin, low power, 3-axis accelerometer with high resolution (13-bit) measurement up to ±12g. Digital output data is formatted as 16-bit twos complement and is accessible through either a SPI (3- or 4-wire) or I2C digital interface.

The ADXL312 is well suited for car alarm or black box applications. It measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (2.9 mg/LSB) enables resolution of inclination changes of as little as 0.25°. A built-in FIFO facilitates using oversampling techniques to improve resolution to as little as 0.05° of inclination.

Several special sensing functions are provided. Activity and inactivity sensing detects the presence or absence of motion and whether the acceleration on any axis exceeds a user-set level. These functions can be mapped to interrupt output pins. An integrated 32 level FIFO can be used to store data to minimize host processor intervention.

Low power modes enable intelligent motion-based power management with threshold sensing and active acceleration measurement at extremely low power dissipation.

The ADXL312 is supplied in a small, thin 5 mm × 5 mm × 1.45 mm, 32-lead, LFCSP package.

Applications
  • Car Alarm
  • Hill Start Aid (HSA)
  • Electronic Parking Brake
  • Data Recorder (black box)
Features and Benefits
  • Ultralow power: as low as 57 μA in measurement mode and 0.1 μA in standby mode at VS = 3.3 V (typical)
  • Power consumption scales automatically with bandwidth
  • User-selectable resolution
  • Fixed 10-bit resolution
  • Full resolution, where resolution increases with g range, up to 13-bit resolution at ±12 g (maintaining 2.9 mg/LSB scale factor in all g ranges)
  • Embedded, patent pending FIFO technology minimizes host processor load
  • Built in motion detection functions for Activity/Inactivity monitoring
  • Supply and I/O voltage range: 2.0 V to 3.6 V
  • SPI (3 and 4 wire) and I2C digital interfaces
  • Flexible interrupt modes mappable to either interrupt pin
  • Measurement ranges selectable via serial command
  • See data sheet for additional features
MEMS
Aerospace and Defense
  • Solutions
Data Sheets
Documentnote
ADXL312: 3-Axis, ±1.5 g/±3 g/±6 g/±12 g Digital Accelerometer Data Sheet (Rev. A)PDF 5684 kB
User Guides
Documentnote
UG-281: ADXL312 Quick Start User GuidePDF 145 kB
UG-209: ADXL312 Sensor Evaluation SystemPDF 2468 kB
Frequently Asked Questions
Documentnote
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
ADXL312ACPZ Production32 ld LFCSP (5x5x.1.55mm) w/3.6exposed padOTH 60-40 to 105C3.73.33E
ADXL312ACPZ-RL Production32 ld LFCSP (5x5x.1.55mm) w/3.6exposed padREEL 4000-40 to 105C03.33E
ADXL312WACPZ Production32 ld LFCSP (5x5x.1.55mm) w/3.6exposed padOTH 60-40 to 105C4.934.11E
ADXL312WACPZ-RL Production32 ld LFCSP (5x5x.1.55mm) w/3.6exposed padREEL 4000-40 to 105C04.11E
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-ADXL312ZBreakout Board33Y
ADXL312: 3-Axis, ±1.5 g/±3 g/±6 g/±12 g Digital Accelerometer Data Sheet (Rev. A) adxl312
ADXL312:3轴、±1.5 g/±3 g/±6 g/±12 g数字加速度计 (Rev. 0) adxl312
ADXL312参考代码 adxl312
UG-281: ADXL312 Quick Start User Guide adxl312
UG-209: ADXL312 Sensor Evaluation System adxl312