Data Sheet
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 V
S
= 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 V
S
SPI (3- and 4-wire) and I
2
C 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
3-Axis, ±1g/±2g/±4g/±8g
Digital Accelerometer
GENERAL DESCRIPTION
The high performance
is a small, thin, low power,
3-axis accelerometer with high resolution (13-bit) and selectable
measurement ranges up to ±8
g.
The
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 I
2
C digital interface.
The
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
is supplied in a small, thin, 3 mm × 4 mm ×
1.2 mm, 16-lead cavity laminate package.
APPLICATIONS
Portable consumer devices
High performance medical and industrial applications
FUNCTIONAL BLOCK DIAGRAM
V
S
V
DD I/O
ADXL350
POWER
MANAGEMENT
SENSE
ELECTRONICS
3-AXIS
SENSOR
ADC
DIGITAL
FILTER
CONTROL
AND
INTERRUPT
LOGIC
INT1
INT2
32 LEVEL
FIFO
SDA/SDI/SDIO
SERIAL I/O
SDO/ALT
ADDRESS
10271-001
SCL/SCLK
GND
CS
Figure 1.
Rev. 0
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
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