AD22285-R2 Analog Devices Inc, AD22285-R2 Datasheet

IC ACCELER 50G DUAL-AXIS 8CLCC

AD22285-R2

Manufacturer Part Number
AD22285-R2
Description
IC ACCELER 50G DUAL-AXIS 8CLCC
Manufacturer
Analog Devices Inc
Series
iMEMS®r
Datasheet

Specifications of AD22285-R2

Acceleration Range
±55g
Axis
X or Y
Sensitivity
38mV/g
Voltage - Supply
5V
Output Type
Analog
Bandwidth
400Hz
Mounting Type
Surface Mount
Package / Case
8-CLCC
No. Of Axes
2
Sensor Case Style
LCC
No. Of Pins
8
Supply Voltage Range
4.75V To 5.25V
Operating Temperature Range
-40°C To +105°C
Acceleration Range ±
50gf
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Interface
-
Lead Free Status / Rohs Status
Compliant
Other names
AD22285-R2TR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD22285-R2
Manufacturer:
ADI/亚德诺
Quantity:
20 000
FEATURES
Complete dual-axis acceleration measurement system on a
Available in ±35 g/±35 g, ±50 g/±50 g, or ±70 g/±35 g output
Full differential sensor and circuitry for high resistance to
Environmentally robust packaging
Complete mechanical and electrical self-test on digital
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
Qualified for automotive applications
APPLICATIONS
Vibration monitoring and control
Vehicle collision sensing
Shock detection
Rev. B
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.
single monolithic IC
full-scale ranges
EMI/RFI
command
V
S
V
V
V
DD2
DD3
DD
EXC
EXC
FUNCTIONAL BLOCK DIAGRAM
GENERATOR
TIMING
DIFFERENTIAL
DIFFERENTIAL
SELF-TEST
SENSOR
SENSOR
Figure 1.
DEMOD
DEMOD
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
AMP
AMP
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.
ADXL278
BESSEL
BESSEL
FILTER
FILTER
400Hz
400Hz
iMEMS
X
Y
OUT
OUT
©2010 Analog Devices, Inc. All rights reserved.
®
Dual-Axis, High-g,
Accelerometers
ADXL278
www.analog.com

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AD22285-R2 Summary of contents

Page 1

... GENERATOR V DD3 DIFFERENTIAL DEMOD EXC SENSOR AMP SELF-TEST Figure 1. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 Dual-Axis, High-g, ® Accelerometers iMEMS ADXL278 ADXL278 400Hz BESSEL X OUT FILTER 400Hz BESSEL Y OUT FILTER www.analog.com ©2010 Analog Devices, Inc. All rights reserved. ...

Page 2

ADXL278 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 4 ESD Caution .................................................................................. 4 Pin Configuration and Function Descriptions ...

Page 3

... DD Functional Range Quiescent Supply Current TEMPERATURE RANGE 1 All minimum and maximum specifications are guaranteed. Typical specifications are not guaranteed. 2 Zero g output is ratiometric. 3 Self-test output (Self-Test Output × Model No. AD22284 Model No. AD22285 Min Typ Max Min 0.1 −5 +5 −5 24 52. ...

Page 4

ADXL278 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Acceleration (Any Axis, Unpowered) Acceleration (Any Axis, Powered All Other Pins Output Short-Circuit Duration (Any Pin to Common) Operating Temperature Range Storage Temperature Stresses above those listed under Absolute Maximum Ratings ...

Page 5

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 3. Pin Function Descriptions Pin No. Mnemonic 1 V DD3 2 Y OUT 3 COM OUT DD2 V DD2 ...

Page 6

ADXL278 Table 4. Recommended Soldering Profile Profile Feature AVERAGE RAMP RATE ( PREHEAT Minimum Temperature (T ) SMIN Maximum Temperature (T ) SMAX TIME ( SMIN SMAX ...

Page 7

THEORY OF OPERATION The ADXL278 provides a fully differential sensor structure and circuit path, resulting in the industry’s highest resistance to EMI/RFI effects. This latest generation uses electrical feedback with zero-force feedback for improved accuracy and stability. The sensor resonant ...

Page 8

... In any clocked system, power supply noise near the clock frequency may have consequences at other frequencies. An internal clock typically controls the sensor excitation and the signal demodulator for micromachined accelerometers. If the power supply contains high frequency spikes, they may be demodulated and interpreted as an acceleration signal. A signal appears as the difference between the noise frequency and the demodulator frequency ...

Page 9

... Model per Reel Range AD22284-A-R2 250 ±35 g/±35 g AD22284-A 3,000 ±35 g/±35 g ADW22284ZC 3,000 ±35 g/±35 g ADW22284ZC-RL7 250 ±35 g/±35 g AD22285-R2 250 ±50 g/±50 g AD22285 3,000 ±50 g/±50 g ADW22285ZC 3,000 ±50 g/±50 g ADW22285ZC-RL7 250 ±50 g/±50 g AD22286-R2 250 ±70 g/±35 g AD22286 3,000 ± ...

Page 10

ADXL278 NOTES Rev Page ...

Page 11

NOTES Rev Page ADXL278 ...

Page 12

ADXL278 NOTES ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05365-0-8/10(B) Rev Page ...

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