ADXL312 Series

3-Axis, ±1.5g/±3g/±6g/±12gDigital Accelerometer

Catalog

3-Axis, ±1.5g/±3g/±6g/±12gDigital Accelerometer

Part	Acceleration Range	Acceleration Range [Max]	Acceleration Range [Min]	Type	Supplier Device Package	Voltage - Supply [Max]	Voltage - Supply [Min]	Bandwidth [Max]	Bandwidth [Min]	Sensitivity (LSB/g) [Max]	Sensitivity (LSB/g) [Min]	Output Type	Features	Axis [z]	Axis [y]	Axis [x]	Package / Case	Operating Temperature [Min]	Operating Temperature [Max]	Mounting Type	Sensing Range	Sensing Range [Min]	Sensing Range [Max]	Contents	Sensor Type	Sensitivity	Interface	Utilized IC / Part	Supplied Contents
Analog Devices ADXL312ACPZ	3 g 6 g 12 g	1.5 g	-1.5 g	Digital	32-LFCSP-LQ	3.6 V	2 V	1.6 kHz	3.125 Hz	43 LSB/g	345 LSB/g	I2C SPI	Adjustable Bandwidth	Z	Y	X	32-LFQFN Exposed Pad CSP	-40 °C	105 ░C	Surface Mount
Analog Devices EVAL-ADXL312Z						3.6 V	2 V														3 g 6 g 12 g	-1.5 g	1.5 g	Board(s)	Accelerometer 3 Axis	43 LSB/g 86 LSB/g 172 LSB/g 345 LSB/g	I2C Serial SPI	ADXL312
Analog Devices EVAL-ADXL312Z-M						3.6 V	2 V														3 g 6 g 12 g	-1.5 g	1.5 g		Accelerometer 3 Axis	43 LSB/g 86 LSB/g 172 LSB/g 345 LSB/g	I2C Serial SPI	ADXL312	Board(s)

Catalog

3-Axis, ±1.5g/±3g/±6g/±12gDigital Accelerometer

Key Features

• 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 resolutionFixed 10-bit resolutionFull resolution, where resolution increases withgrange, up to 13-bit resolution at ±12g(maintaining 2.9 mg/LSB scale factor in allgranges)

• Fixed 10-bit resolution

• Full resolution, where resolution increases withgrange, up to 13-bit resolution at ±12g(maintaining 2.9 mg/LSB scale factor in allgranges)

• Embedded FIFO technology minimizes host processor load

• Supply and I/O voltage range: 2.0 V to 3.6 V

• Built-in motion detection functions for activity/inactivity monitoring

• SPI (3- and 4-wire) and I2C digital interfaces

• Flexible interrupt modes mappable to either interrupt pin

• Measurement ranges selectable via serial command

• Bandwidth selectable via serial command

• Wide temperature range (−40 to +105°C)

• 10,000gshock survival

• Pb free/RoHS compliant

• Small and thin: 5 mm × 5 mm × 1.45 mm LFCSP package

• Qualified for automotive applications

Description

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 serial port interface (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.APPLICATIONSCar alarmHill start aid (HSA)Electronic parking brakeData recorder (black box)