ADXL350BCEZ-RL7 Datasheet, PDF (1/36 Pages) Analog Devices – Digital Accelerometer

Data Sheet
3-Axis, ±1g/±2g/±4g/±8g
Digital Accelerometer
ADXL350
FEATURES
Excellent zero-g bias accuracy and stability with
minimum/maximum specifications
Ultralow power: as low as 45 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
Fixed 10-bit resolution
Full resolution, where resolution increases with g range,
up to 13-bit resolution at ±8 g (maintains 2 mg/LSB scale
factor in all g ranges)
Embedded, 32-level FIFO buffer minimizes host processor
load
Tap/double tap detection 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
Wide temperature range (−40°C to +85°C)
10,000 g shock survival
Pb-free/RoHS compliant
Small and thin: 4 mm × 3 mm × 1.2 mm cavity LGA package
APPLICATIONS
Portable consumer devices
High performance medical and industrial applications
GENERAL DESCRIPTION
The high performance ADXL350 is a small, thin, low power,
3-axis accelerometer with high resolution (13-bit) and selectable
measurement ranges up to ±8 g. The ADXL350 offers industry-
leading noise and temperature performance for application
robustness with minimal calibration. 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 ADXL350 is well suited for high performance portable
applications. It measures the static acceleration of gravity in tilt-
sensing applications, as well as dynamic acceleration resulting
from motion or shock. Its high resolution (2 mg/LSB) enables
measurement of inclination changes of less than 1.0°.
Several special sensing functions are provided. Activity and
inactivity sensing detect the presence or lack of motion and if
the acceleration on any axis exceeds a user-set level. Tap sensing
detects single and double taps. Free-fall sensing detects if the
device is falling. These functions can be mapped to one of two
interrupt output pins.
Low power modes enable intelligent motion-based power
management with threshold sensing and active acceleration
measurement at extremely low power dissipation.
The ADXL350 is supplied in a small, thin, 3 mm × 4 mm ×
1.2 mm, 16-lead cavity laminate package.
FUNCTIONAL BLOCK DIAGRAM
V_S V_{DD I/O}
ADXL350
POWER
MANAGEMENT
3-AXIS
SENSOR
SENSE
ELECTRONICS
ADC
DIGITAL
FILTER
CONTROL
AND
INTERRUPT
LOGIC
INT1
INT2
GND
32 LEVEL
FIFO
Figure 1.
SERIAL I/O
CS
SDA/SDI/SDIO
SDO/ALT
ADDRESS
SCL/SCLK
Rev. 0
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