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ADXL210JE Datasheet(Arkusz danych) 1 Page - Analog Devices

Numer części ADXL210JE
Szczegółowy opis  Low-Cost 10 g Dual-Axis Accelerometer with Duty Cycle
Pobierz  12 Pages
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
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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. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
a
ADXL210E
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
© Analog Devices, Inc., 2002
Low-Cost
10
g Dual-Axis
Accelerometer with Duty Cycle
FUNCTIONAL BLOCK DIAGRAM
ANALOG
TO
DUTY
CYCLE
(ADC)
C
O
U
N
T
E
R
P
XOUT
YOUT
DEMOD
DEMOD
RFILT
32k
RFILT
32k
ADXL210E
RSET
T2
CY
YFILT
SELF-TEST
XFILT
CX
OSCILLATOR
COM
Y SENSOR
X SENSOR
3V TO 5.25V
VDD
CDC
T1
T2
A(g) = (T1/T2 – 0.5)/4%
0g = 50% DUTY CYCLE
T2 = RSET/125M
FEATURES
2-Axis Acceleration Sensor on a Single IC Chip
5 mm
5 mm
2 mm Ultrasmall Chip Scale Package
2m
g Resolution at 60 Hz
Low Power < 0.6 mA
Direct Interface to Low-Cost Microcontrollers via
Duty Cycle Output
BW Adjustment with a Single Capacitor
3 V to 5.25 V Single-Supply Operation
1000
g Shock Survival
APPLICATIONS
2-Axis Tilt Sensing with Faster Response than
Electrolytic, Mercury, or Thermal Sensors
Computer Peripherals
Information Appliances
Alarms and Motion Detectors
Disk Drives
Vehicle Security
GENERAL DESCRIPTION
The ADXL210E is a low-cost, low-power, complete 2-axis acceler-
ometer with a digital output, all on a single monolithic IC. It is an
improved version of the ADXL210AQC/JQC. The ADXL210E
will measure accelerations with a full-scale range of
±10 g. The
ADXL210E can measure both dynamic acceleration (e.g., vibra-
tion) and static acceleration (e.g., gravity).
The outputs are analog voltage or digital signals whose duty cycles
(ratio of pulsewidth to period) are proportional to acceleration.
The duty cycle outputs can be directly measured by a micro-
processor counter without an A/D converter or glue logic. The
duty cycle period is adjustable from 0.5 ms to 10 ms via a single
resistor (RSET).
The typical noise floor is 200 g
√Hz, allowing signals below
2mg (at 60 Hz bandwidth) to be resolved.
The bandwidth of the accelerometer is set with capacitors CX and
CY at the XFILT and YFILT pins. An analog output can be recon-
structed by filtering the duty cycle output.
The ADXL210E is available in a 5 mm
5 mm
2 mm 8-lead
hermetic LCC package.




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