ADXL288 Datasheet, PDF (1/2 Pages) Analog Devices – High Performance, Dual-Axis Digital Output Accelerometer

Data Sheet
High Performance, Dual-Axis
Digital Output Accelerometer
ADXL288
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
SELF-
TEST
STATE MACHINE
ARM_X
ARM_Y
AC
AMP
DEMOD
Σ-Δ
MOD
SINC³ + FIR FILTER
–3dB AT 408Hz
OFFSET/
SENSITIVITY
CALIBRATION
OFFSET
CANCELLATION
INTERPOLATION
AT 512kHz
X-AXIS
SENSOR
SENSOR
DRIVERS
Y-AXIS
SENSOR
AC
AMP
DEMOD
Σ-Δ
MOD
SENSOR
DRIVERS
SINC³ + FIR FILTER
–3dB AT 408Hz
OFFSET/
SENSITIVITY
CALIBRATION
TIMING
GENERATOR
OFFSET
CANCELLATION
INTERPOLATION
AT 512kHz
OTP
MEMORY
DEVICE ID
TRIM
CONFIGURATION
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.
MISO
MOSI
SCLK
CS
VDD
VREG
GND
EPAD
Rev. Sp0
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