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ADXL202JQC 参数 Datasheet PDF下载

ADXL202JQC图片预览
型号: ADXL202JQC
PDF下载: 下载PDF文件 查看货源
内容描述: 低成本+ -2克/ + - 10克双轴加速度计的iMEMS数字输出 [Low Cost +-2 g/+-10 g Dual Axis iMEMS Accelerometers with Digital Output]
分类和应用:
文件页数/大小: 11 页 / 128 K
品牌: AD [ ANALOG DEVICES ]
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a
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 m
g
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
Low Cost 2
g/
10
g
Dual Axis
iMEMS
®
Accelerometers
with Digital Output
ADXL202/ADXL210
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 dy-
namic 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 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 (R
SET
). If a voltage output is desired, a
voltage output proportional to acceleration is available from the
X
FILT
and Y
FILT
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 C
X
and C
Y
. 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.
FUNCTIONAL BLOCK DIAGRAM
+3.0V TO +5.25V
C
X
V
DD
V
DD
X
FILT
SELF TEST
X SENSOR
C
DC
DEMOD
R
FILT
32k
ADXL202/
ADXL210
X OUT
DUTY
CYCLE
MODULATOR
(DCM)
C
O
U
N
T
E
R
OSCILLATOR
R
FILT
32k
DEMOD
Y SENSOR
P
Y OUT
COM
Y
FILT
C
Y
T2
R
SET
T2
T1
A(g) = (T1/T2 – 0.5)/12.5%
0g = 50% DUTY CYCLE
T2 = R
SET
/125M
i
MEM
S
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.
A
IN
2 =
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