High Performance, Dual-Axis
Digital Output Accelerometer
Data Sheet
ADXL288
Rev. Sp0 Document Feedback
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FEATURES
±120 g full-scale range
12-bit resolution at 62.5 mg/LSB
512 kHz data interpolation rate
Sensor frequency response down to dc
On-demand electromechanical self-test
Fully differential circuitry for high resistance to EMI/RFI
Independent x- and y-axis sense structures for robust
FMEA performance
Independent x- and y-axis arming thresholds
Low noise: 1 LSB rms typical
Qualified for automotive applications
Temperature range: −40°C to +105°C
3.3 V and 5 V operation
APPLICATIONS
Impact sensing
Shock detection
GENERAL DESCRIPTION
The ADXL288 is a dual-axis accelerometer with signal-
conditioned outputs available via a 16-bit SPI interface. Identical,
independent X and Y sense structures are implemented to create
a high performance, high integrity acceleration sensing system.
The X and Y acceleration channels have a nominal full-scale
range of ±120 g and a bandwidth of 408 Hz. The acceleration
data is provided as a 12-bit, twos complement word with a
resolution of 62.5 mg/LSB.
The ADXL288 is available in a 16-lead, narrow-body SOIC
package with an exposed pad. The ADXL288 can operate
at 3.3 V and 5 V and is specified for operation from −40°C
to +105°C.
FUNCTIONAL BLOCK DIAGRAM
X-AXIS
SENSOR
Y-AXIS
SENSOR
DEMOD
SENSOR
DRIVERS
SELF-
TEST
Σ-Δ
MOD
STATE MACHINE
TIMING
GENERATOR
OTP
MEMORY
DEVICE ID
TRIM
CONFIGURATION
REGISTERS/MEMORY
ARMING PIN
FUNCTIONALITY
SPI INTERFACE
VOLTAGE
REGULATOR
MISO
MOSI
SCLK
CS
VDD
VREG
GND
ARM_Y
ARM_X
EPAD
AC
AMP
DEMOD
SENSOR
DRIVERS
Σ-Δ
MOD
AC
AMP
OFFSET/
SENSITIVITY
CALIBRATION
SINC3+ FIR FILTER
–3dB AT 408Hz
MUX
INTERPOLATION
AT 512kHz
OFFSET
CANCELLATION
OFFSET/
SENSITIVITY
CALIBRATION
SINC3+ FIR FILTER
–3dB AT 408Hz
MUX
INTERPOLATION
AT 512kHz
OFFSET
CANCELLATION
11204-001
Figure 1.
For more information about the ADXL288, please contact the Analog Devices, Inc., Customer Interaction Center at
http://www.analog.com/en/content/technical_support_page/fca.html to connect with a technical support specialist.
