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Axis Accelerometer. ADXL213 Datasheet

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Axis Accelerometer. ADXL213 Datasheet






ADXL213 Accelerometer. Datasheet pdf. Equivalent




ADXL213 Accelerometer. Datasheet pdf. Equivalent





Part

ADXL213

Description

Low Cost 1.2 g Dual Axis Accelerometer



Feature


Low Cost ±1.2 g Dual Axis Accelerometer ADXL213 FEATURES Dual axis acceleromet er on a single IC chip 5 mm × 5 mm × 2 mm LCC package 1 mg resolution at 60 Hz Low power: 700 µA at VS = 5 V (typi cal) High zero g bias stability High se nsitivity accuracy Pulse width modulate d digital outputs www.DataSheet4U.com X and Y axes aligned to within 0.1° (ty pical) BW adjustment wi.
Manufacture

Analog Devices

Datasheet
Download ADXL213 Datasheet


Analog Devices ADXL213

ADXL213; th a single capacitor Single-supply oper ation 3500 g shock survival GENERAL DE SCRIPTION The ADXL213 is a low cost, lo w power, complete dual axis acceleromet er with signal conditioned, duty cycle modulated outputs, all on a single mono lithic IC. The ADXL213 measures acceler ation with a full-scale range of ±1.2 g (typical). The ADXL213 can measure bo th dynamic accelera.


Analog Devices ADXL213

tion (e.g., vibration) and static accele ration (e.g., gravity). The outputs are digital signals whose duty cycles (rat io of pulse width to period) are propor tional to acceleration (30%/g). The dut y cycle outputs can be directly measure d by a microcontroller without an A/D c onverter or glue logic. Innovative desi gn techniques are used to ensure high z ero g bias stabili.


Analog Devices ADXL213

ty (typically better than 0.25 mg/°C), as well as tight sensitivity stability (typically better than 50 ppm/°C). The typical noise floor is 160 µg/√Hz, allowing signals below 1 mg (0.06° of inclination) to be resolved in tilt sen sing applications using narrow bandwidt hs (<60 Hz). The user selects the bandw idth of the accelerometer using capacit ors CX and CY at the XFI.

Part

ADXL213

Description

Low Cost 1.2 g Dual Axis Accelerometer



Feature


Low Cost ±1.2 g Dual Axis Accelerometer ADXL213 FEATURES Dual axis acceleromet er on a single IC chip 5 mm × 5 mm × 2 mm LCC package 1 mg resolution at 60 Hz Low power: 700 µA at VS = 5 V (typi cal) High zero g bias stability High se nsitivity accuracy Pulse width modulate d digital outputs www.DataSheet4U.com X and Y axes aligned to within 0.1° (ty pical) BW adjustment wi.
Manufacture

Analog Devices

Datasheet
Download ADXL213 Datasheet




 ADXL213
Low Cost ±1.2 g Dual
Axis Accelerometer
ADXL213
FEATURES
Dual axis accelerometer on a single IC chip
5 mm × 5 mm × 2 mm LCC package
1 mg resolution at 60 Hz
Low power: 700 µA at VS = 5 V (typical)
High zero g bias stability
High sensitivity accuracy
www.DataSheePt4uUls.ceowmidth modulated digital outputs
X and Y axes aligned to within 0.1° (typical)
BW adjustment with a single capacitor
Single-supply operation
3500 g shock survival
APPLICATIONS
Automotive tilt alarms
Data projectors
Navigation
Platform stabilization/leveling
Alarms and motion detectors
High accuracy, 2-axis tilt sensing
GENERAL DESCRIPTION
The ADXL213 is a low cost, low power, complete dual axis
accelerometer with signal conditioned, duty cycle modulated
outputs, all on a single monolithic IC. The ADXL213 measures
acceleration with a full-scale range of ±1.2 g (typical). The
ADXL213 can measure both dynamic acceleration (e.g.,
vibration) and static acceleration (e.g., gravity).
The outputs are digital signals whose duty cycles (ratio of pulse
width to period) are proportional to acceleration (30%/g). The
duty cycle outputs can be directly measured by a microcontrol-
ler without an A/D converter or glue logic.
Innovative design techniques are used to ensure high zero g bias
stability (typically better than 0.25 mg/°C), as well as tight sensi-
tivity stability (typically better than 50 ppm/°C).
The typical noise floor is 160 µg/√Hz, allowing signals below
1 mg (0.06° of inclination) to be resolved in tilt sensing applica-
tions using narrow bandwidths (<60 Hz).
The user selects the bandwidth of the accelerometer using
capacitors CX and CY at the XFILT and YFILT pins. Bandwidths of
0.5 Hz to 250 Hz may be selected to suit the application.
The ADXL213 is available in a 5 mm × 5 mm × 2 mm, 8-pad
hermetic LCC package.
FUNCTIONAL BLOCK DIAGRAM
+VS
+VS
CY
YFILT
ADXL213
CDC
SENSOR
AC
AMP
DEMOD
OUTPUT 32k
AMP
OUTPUT
AMP 32k
DCM
YOUT
XOUT
COM
ST
XFILT
CX
T2
RSET
T2
T1
A(g) = (T1/T2 – 0.5)/30%
0g = 50% DUTY CYCLE
T2(s) = RSET/125M
Figure 1.
Rev. 0
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: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.




 ADXL213
ADXL213
TABLE OF CONTENTS
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
Typical Performance Characteristics ............................................. 5
Theory of Operation ........................................................................ 8
Performance .................................................................................. 8
Applications....................................................................................... 9
www.DataShPeoewt4eUr.cSoumpply Decoupling ........................................................... 9
Setting the Bandwidth Using CX and CY.................................... 9
Self Test .......................................................................................... 9
REVISION HISTORY
Revision 0: Initial Version
Design Trade-Offs for Selecting Filter Characteristics:
The Noise/BW Trade-Off........................................................9
Using the ADXL213 with Operating Voltages Other
than 5 V................................................................................... 10
Using the ADXL213 as a Dual-Axis Tilt Sensor..................... 10
Pin Configurations and Functional Descriptions ...................... 11
Outline Dimensions ....................................................................... 12
ESD Caution................................................................................ 12
Ordering Guide .......................................................................... 12
Rev. 0 | Page 2 of 12




 ADXL213
ADXL213
SPECIFICATIONS
TA = –40°C to +85°C, VS = 5 V, CX = CY = 0.1 μF, Acceleration = 0 g, unless otherwise noted. All minimum and maximum specifications
are guaranteed. Typical specifications are not guaranteed.
Table 1.
Parameter
SENSOR INPUT
Measurement Range1
Nonlinearity
Package Alignment Error
Alignment Error
Cross Axis Sensitivity
www.DataSheet4U.com
SENSITIVITY
(Ratiometric)2
Sensitivity at XOUT, YOUT
Sensitivity Change due to Temperature3
ZERO g BIAS LEVEL (Ratiometric)
0 g Voltage at XOUT, YOUT
Initial 0 g Output Deviation from Ideal
0 g Offset vs. Temperature
NOISE PERFORMANCE
Noise Density
FREQUENCY RESPONSE4
CX, CY Range5
RFILT Tolerance
Sensor Resonant Frequency
SELF TEST6
Logic Input Low
Logic Input High
ST Input Resistance to Ground
Output Change at XOUT, YOUT
PWM Output
FSET
T2 Drift versus Temperature
POWER SUPPLY
Operating Voltage Range
Quiescent Supply Current
Turn-On Time7
Conditions
Each axis
% of full scale
X sensor to Y sensor
Each axis
VS = 5 V
VS = 5 V
Each axis
VS = 5 V
VS = 5 V, 25°C
@25°C
Self test 0 to 1
RSET = 125 kΩ
Min
27
0.002
22
4
30
3
Typ Max
±1.2
±0.5
±1
±0.1
±2
30 33
±0.3
±50
±2
±0.25
160
4.7
32 42
5.5
1
50
23
1
±0.3
6
0.7 1.1
20
Unit
g
%
Degrees
Degrees
%
%/g
%
%
%
mg/°C
µg/√Hz rms
µF
kΩ
kHz
V
V
kΩ
%
kHz
%
V
mA
ms
1 Guaranteed by measurement of initial offset and sensitivity.
2 Sensitivity varies with VS. At VS = 3 V, sensitivity is typically 28%/g.
3 Defined as the output change from ambient-to-maximum temperature or ambient-to-minimum temperature.
4 Actual frequency response controlled by user-supplied external capacitor (CX, CY).
5 Bandwidth = 1/(2 × π × 32 kΩ × C). For CX, CY = 0.002 µF, Bandwidth = 2500 Hz. For CX, CY = 4.7 µF, Bandwidth = 1 Hz. Minimum/maximum values are not tested.
6 Self-test response changes with VS. At VS = 3 V, self-test output is typically 8%.
7 Larger values of CX, CY increase turn-on time. Turn-on time is approximately 160 × CX or CY + 4 ms, where CX, CY are in µF.
Rev. 0 | Page 3 of 12



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