ADXL345-EP Datasheet, PDF (1/12 Pages) Analog Devices – ADXL345-EP

Enhanced Product
3-Axis, ±2 g/±4 g/±8 g/±16 g
Digital Accelerometer
ADXL345-EP
FEATURES
GENERAL DESCRIPTION
Ultralow power: as low as 23 µA in measurement mode and
0.1 µA in standby mode at VS = 2.5 V (typical)
Power consumption scales automatically with bandwidth
User-selectable resolution from 10 to 13 bits
4 mg/LSB scale factor in all g ranges
32-sample FIFO minimizes host processor load
Single tap, double tap, and free-fall detection
Activity/inactivity monitoring
Supply voltage range: 2.0 V to 3.6 V
I/O voltage range: 1.7 V to VS
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
10,000 g shock survival
Pb free/RoHS compliant
Small and thin: 3 mm × 5 mm × 1 mm LGA package
ENHANCED PRODUCT FEATURES
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
APPLICATIONS
Industrial equipment
Aerospace equipment
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. Free-
fall 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.
FUNCTIONAL BLOCK DIAGRAM
V_S V_{DD I/O}
ADXL345-EP
POWER
MANAGEMENT
3-AXIS
SENSOR
SENSE
ELECTRONICS
ADC
DIGITAL
FILTER
CONTROL
AND
INTERRUPT
LOGIC
INT1
INT2
32 LEVEL
FIFO
SERIAL I/O
SDA/SDI/SDIO
SDO/ALT
ADDRESS
SCL/SCLK
GND
CS
Figure 1.
Rev. B
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