Datasheet ADXL345-EP (Analog Devices)

3-Axis, ±2 g /±4 g /±8 g /±16 g Digital Accelerometer Enhanced Product ADXL345-EP FEATURES GENERAL DESCRIPTION Ultralow power: as low as 23 µA in measurement mode and
The ADXL345-EP is an extended performance version of
0.1 µA in standby mode at VS = 2.5 V (typical)
the ADXL345, which is a small, thin, ultralow power, 3-axis
Power consumption scales automatically with bandwidth
accelerometer with high resolution (13-bit) measurement at up to
User-selectable resolution from 10 to 13 bits
±16 g. Digital output data is formatted as 16-bit twos complement
4 mg /LSB scale factor in all g ranges
and is accessible through either a SPI (3- or 4-wire) or I2C digital
32-sample FIFO minimizes host processor load
interface.
Single tap, double tap, and free-fall detection
The ADXL345-EP is well suited for extended temperature range
Activity/inactivity monitoring
industrial and aerospace equipment. It measures the static
Supply voltage range: 2.0 V to 3.6 V
acceleration of gravity in tilt-sensing applications, as well as
I/O voltage range: 1.7 V to VS
dynamic acceleration resulting from motion or shock. Its high
SPI (3- and 4-wire) and I2C digital interfaces
resolution (3.9 mg/LSB) enables measurement of inclination
Flexible interrupt modes mappable to either interrupt pin
changes less than 1.0°.
Measurement ranges selectable via serial command Bandwidth selectable via serial command
Several special sensing functions are provided. Activity and
10,000 g shock survival
inactivity sensing detect the presence or lack of motion by
Pb free/RoHS compliant
comparing the acceleration on any axis with user-set thresholds.
Small and thin: 3 mm × 5 mm × 1 mm LGA package
Tap sensing detects single and double taps in any direction. Free- fall sensing detects if the device is falling. These functions can
ENHANCED PRODUCT FEATURES
be mapped individually to either of two interrupt output pins.
Supports defense and aerospace applications (AQEC standard)
An integrated memory management system with a 32-level first in,
Extended industrial temperature range (−55°C to +105°C)
first out (FIFO) buffer can be used to store data to minimize host
Controlled manufacturing baseline
processor activity and lower overall system power consumption.
One assembly/test site
Low power modes enable intelligent motion-based power
One fabrication site
management with threshold sensing and active acceleration
Enhanced product change notification
measurement at extremely low power dissipation.
Qualification data available on request
The ADXL345-EP is supplied in a small, thin, 3 mm × 5 mm ×
APPLICATIONS
1 mm, 14-lead, enhanced plastic package.
Industrial equipment Aerospace equipment FUNCTIONAL BLOCK DIAGRAM VS VDD I/O ADXL345-EP POWER MANAGEMENT CONTROL INT1 SENSE ADC AND ELECTRONICS DIGITAL INTERRUPT 3-AXIS FILTER LOGIC INT2 SENSOR SDA/SDI/SDIO 32 LEVEL SERIAL I/O FIFO SDO/ALT ADDRESS SCL/SCLK
001
GND CS
10413- Figure 1.
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Document Outline Features Enhanced Product Features Applications General Description Functional Block Diagram Revision History Related Documents Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Outline Dimensions Ordering Guide