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AD22285 View Datasheet(PDF) - Analog Devices

Part NameAD22285 ADI
Analog Devices ADI
DescriptionDual-Axis, High-g, iMEMS® Accelerometers


AD22285 Datasheet PDF : 12 Pages
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Dual-Axis, High-g,
iMEMS® Accelerometers
ADXL278
FEATURES
Complete dual-axis acceleration measurement system on
a single monolithic IC
Available in ±35 g/±35 g, ±50 g/±50 g, or ±70 g/±35 g
output full-scale ranges
Full differential sensor and circuitry for high resistance
to EMI/RFI
Environmentally robust packaging
Complete mechanical and electrical self-test on
digital command
Output ratiometric to supply
Sensitive axes in the plane of the chip
High linearity (0.2% of full scale)
Frequency response down to dc
Low noise
Low power consumption
Tight sensitivity tolerance and 0 g offset capability
Largest available prefilter clipping headroom
400 Hz, 2-pole Bessel filter
Single-supply operation
Compatible with Sn/Pb and Pb-free solder processes
GENERAL DESCRIPTION
The ADXL278 is a low power, complete, dual-axis
accelerometer with signal conditioned voltage outputs that are
on a single monolithic IC. This product measures acceleration
with a full-scale range of (X-axis/Y-axis) ±35 g/±35 g, ±50 g/
±50 g, or ±70 g/±35 g (minimum). The ADXL278 can also
measure both dynamic acceleration (vibration) and static
acceleration (gravity).
The ADXL278 is the fourth-generation surface micromachined
iMEMS® accelerometer from ADI with enhanced performance
and lower cost. Designed for use in front and side impact airbag
applications, this product also provides a complete cost-
effective solution useful for a wide variety of other applications.
The ADXL278 is temperature stable and accurate over the
automotive temperature range, with a self-test feature that fully
exercises all the mechanical and electrical elements of the sensor
with a digital signal applied to a single pin.
The ADXL278 is available in a 5 mm × 5 mm × 2 mm,
8-terminal ceramic LCC package.
APPLICATIONS
Vibration monitoring and control
Vehicle collision sensing
Shock detection
FUNCTIONAL BLOCK DIAGRAM
ADXL278
VS
VDD
VDD2
VDD3
EXC
DIFFERENTIAL
SENSOR
TIMING
GENERATOR
DEMOD
AMP
400Hz
BESSEL
FILTER
XOUT
EXC
DIFFERENTIAL
SENSOR
DEMOD
AMP
400Hz
BESSEL
FILTER
YOUT
SELF-TEST
Figure 1.
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2005 Analog Devices, Inc. All rights reserved.
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GENERAL DESCRIPTION
The ADXL278 is a low power, complete, dual-axis accelerometer with signal conditioned voltage outputs that are on a single monolithic IC. This product measures acceleration with a full-scale range of (X-axis/Y-axis) ±35 g/±35 g, ±50 g/±50 g, or ±70 g/±35 g (minimum). The ADXL278 can also measure both dynamic acceleration (vibration) and static acceleration (gravity).
The ADXL278 is the fourth-generation surface micromachined iMEMS® accelerometer from ADI with enhanced performance and lower cost. Designed for use in front and side impact airbag applications, this product also provides a complete cost effective solution useful for a wide variety of other applications.

FEATURES
  Complete dual-axis acceleration measurement system on a single monolithic IC
  Available in ±35 g/±35 g, ±50 g/±50 g, or ±70 g/±35 g output full-scale ranges
  Full differential sensor and circuitry for high resistance to EMI/RFI
  Environmentally robust packaging
  Complete mechanical and electrical self-test on digital command
  Output ratiometric to supply
  Sensitive axes in the plane of the chip
  High linearity (0.2% of full scale)
  Frequency response down to dc
  Low noise
  Low power consumption
  Tight sensitivity tolerance and 0 g offset capability
  Largest available prefilter clipping headroom
  400 Hz, 2-pole Bessel filter
  Single-supply operation
  Compatible with Sn/Pb and Pb-free solder processes

APPLICATIONS
  Vibration monitoring and control
  Vehicle collision sensing
  Shock detection

 

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