Datasheet ADXL288 (Analog Devices)

High Performance, Dual-Axis Digital Output Accelerometer Data Sheet ADXL288 FEATURES GENERAL DESCRIPTION ±120 g full-scale range
The ADXL288 is a dual-axis accelerometer with signal-
12-bit resolution at 62.5 mg /LSB
conditioned outputs available via a 16-bit SPI interface. Identical,
512 kHz data interpolation rate
independent X and Y sense structures are implemented to create
Sensor frequency response down to dc
a high performance, high integrity acceleration sensing system.
On-demand electromechanical self-test
The X and Y acceleration channels have a nominal ful -scale
Fully differential circuitry for high resistance to EMI/RFI
range of ±120 g and a bandwidth of 408 Hz. The acceleration
Independent x- and y-axis sense structures for robust
data is provided as a 12-bit, twos complement word with a
FMEA performance
resolution of 62.5 mg/LSB.
Independent x- and y-axis arming thresholds Low noise: 1 LSB rms typical
The ADXL288 is available in a 16-lead, narrow-body SOIC
Qualified for automotive applications
package with an exposed pad. The ADXL288 can operate
Temperature range: −40°C to +105°C
at 3.3 V and 5 V and is specified for operation from −40°C
3.3 V and 5 V operation
to +105°C.
APPLICATIONS Impact sensing Shock detection FUNCTIONAL BLOCK DIAGRAM Y SELF- ARM_X IN IT TEST STATE MACHINE P L ARM_Y G NA IN IO M T AR UNC F UX INTERPOLATION Σ-Δ OFFSET/ M AT 512kHz AC SINC3 + FIR FILTER OFFSET DEMOD SENSITIVITY MOD –3dB AT 408Hz CANCELLATION AMP CALIBRATION Y MISO R O E M E AC F MOSI X-AXIS /M R SENSOR S E SENSOR T DRIVERS R E N T I I S SCLK GI SP E R CS UX INTERPOLATION Σ-Δ OFFSET/ M AT 512kHz AC SINC3 + FIR FILTER OFFSET DEMOD SENSITIVITY MOD AMP –3dB AT 408Hz CANCELLATION CALIBRATION R E DEVICE ID O G VDD AT OTP A Y-AXIS TRIM SENSOR LT UL VREG MEMORY SENSOR O G DRIVERS CONFIGURATION V E TIMING R GND GENERATOR EPAD
001 1204- 1 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.
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Document Outline Features Applications General Description Functional Block Diagram