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ADXL202 View Datasheet(PDF) - Analog Devices

Part NameADXL202 ADI
Analog Devices ADI
DescriptionLow Cost ±2 g/±10 g Dual Axis iMEMS® Accelerometers with Digital Output


ADXL202 Datasheet PDF : 11 Pages
1 2 3 4 5 6 7 8 9 10
a
Low Cost ؎2 g/؎10 g Dual Axis
iMEMS® Accelerometers
with Digital Output
ADXL202/ADXL210
FEATURES
GENERAL DESCRIPTION
2-Axis Acceleration Sensor on a Single IC Chip
The ADXL202/ADXL210 are low cost, low power, complete
Measures Static Acceleration as Well as Dynamic
2-axis accelerometers with a measurement range of either
Acceleration
± 2 g/± 10 g. The ADXL202/ADXL210 can measure both dy-
Duty Cycle Output with User Adjustable Period
namic acceleration (e.g., vibration) and static acceleration (e.g.,
Low Power <0.6 mA
gravity).
Faster Response than Electrolytic, Mercury or Thermal
The outputs are digital signals whose duty cycles (ratio of pulse-
Tilt Sensors
Bandwidth Adjustment with a Single Capacitor Per Axis
5 mg Resolution at 60 Hz Bandwidth
+3 V to +5.25 V Single Supply Operation
1000 g Shock Survival
E APPLICATIONS
2-Axis Tilt Sensing
Computer Peripherals
Inertial Navigation
T Seismic Monitoring
Vehicle Security Systems
E Battery Powered Motion Sensing
width to period) are proportional to the acceleration in each of
the 2 sensitive axes. These outputs may be measured directly
with a microprocessor counter, requiring no A/D converter or
glue logic. The output period is adjustable from 0.5 ms to 10 ms
via a single resistor (RSET). If a voltage output is desired, a
voltage output proportional to acceleration is available from the
XFILT and YFILT pins, or may be reconstructed by filtering the
duty cycle outputs.
The bandwidth of the ADXL202/ADXL210 may be set from
0.01 Hz to 5 kHz via capacitors CX and CY. The typical noise
floor is 500 µg/Hz allowing signals below 5 mg to be resolved
for bandwidths below 60 Hz.
The ADXL202/ADXL210 is available in a hermetic 14-lead
Surface Mount CERPAK, specified over the 0°C to +70°C
commercial or –40°C to +85°C industrial temperature range.
L FUNCTIONAL BLOCK DIAGRAM
+3.0V TO +5.25V
O VDD
VDD
CX
XFILT
SELF TEST
ADXL202/
X SENSOR
RFILT
ADXL210
32k
X OUT
S CDC
DEMOD
OSCILLATOR
DUTY
CYCLE
MODULATOR
(DCM)
C
O
U
N P
T
B DEMOD
RFILT
32k
E
Y OUT
R
O YSENSOR
COM
YFILT
T2
CY
RSET
T2
iMEMS is a registered trademark of Analog Devices, Inc.
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
T1
A(g) = (T1/T2 – 0.5)/12.5%
0g = 50% DUTY CYCLE
T2 = RSET/125M
AIN2 =
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1999
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GENERAL DESCRIPTION
The ADXL202/ADXL210 are low cost, low power, complete 2-axis accelerometers with a measurement range of either ±2 g/±10 g. The ADXL202/ADXL210 can measure both dynamic acceleration (e.g., vibration) and static acceleration (e.g., gravity).

FEATURES
2-Axis Acceleration Sensor on a Single IC Chip
Measures Static Acceleration as Well as Dynamic Acceleration
Duty Cycle Output with User Adjustable Period
Low Power <0.6 mA
Faster Response than Electrolytic, Mercury or Thermal Tilt Sensors
Bandwidth Adjustment with a Single Capacitor Per Axis
5 mg Resolution at 60 Hz Bandwidth
+3 V to +5.25 V Single Supply Operation
1000 g Shock Survival

APPLICATIONS
2-Axis Tilt Sensing
Computer Peripherals
Inertial Navigation
Seismic Monitoring
Vehicle Security Systems
Battery Powered Motion Sensing

 

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