ADXL345-EP Datasheet

• Ultralow power: as low as 23 μA in measurement mode and 0.1 μA in standby mode at V_S = 2.5 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 ±16 g (maintaining 4 mg/LSB scale factor in all g ranges)
• Embedded memory management system with FIFO technology minimizes host processor load
• Single tap/double tap detection
• Activity/inactivity monitoring
• Free-fall detection
• Supply voltage range: 2.0 V to 3.6 V
• I/O voltage range: 1.7 V to V_S
• 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°C to +85°C)
• 10,000 g shock survival
• Pb free/RoHS compliant
• Small and thin: 3 mm × 5 mm × 1 mm LGA package

ADXL345-EP supports defense and aerospace applications (AQEC standard)

• Extended industrial temperature range:  (−55°C to +105°C)
• Controlled manufacturing baseline
• One assembly/test site
• One fabrication site
• Enhanced product change notification
• Qualification data available on request
• V62/12657 DSCC Drawing Number

The ADXL345-EP is an extended performance version of the ADXL345, which is a small, thin, ultralow power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16 g. 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 ADXL345-EP is well suited for extended temperature range industrial and aerospace equipment. It measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (3.9 mg/LSB) enables measurement of inclination changes less than 1.0°.

Several special sensing functions are provided. Activity and inactivity sensing detect the presence or lack of motion by comparing the acceleration on any axis with user-set thresholds.Tap sensing detects single and double taps in any direction. Freefall sensing detects if the device is falling. These functions can be mapped individually to either of two interrupt output pins.An integrated memory management system with a 32-level first in,first out (FIFO) buffer can be used to store data to minimize host processor activity and lower overall system power consumption.

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

The ADXL345-EP is supplied in a small, thin, 3 mm × 5 mm ×1 mm, 14-lead, enhanced plastic package.