Product Details
●The ADXL312 is a small, thin, low power, 3-axis accelerometer with high resolution (13-bit) measurement up to ±12 _g_. 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 m_g_/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 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
● Bandwidth selectable via serial command
● Wide temperature range (−40 to +105°C)
● 10,000 _g_ shock survival
● Pb free/RoHS compliant
● Small and thin: 5 mm × 5 mm × 1.45 mm LFCSP package
● Qualified for automotive applications
