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ADXL202AQC PDF预览

ADXL202AQC

更新时间: 2024-01-06 12:17:38
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
11页 128K
描述
Low Cost +-2 g/+-10 g Dual Axis iMEMS Accelerometers with Digital Output

ADXL202AQC 数据手册

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Low Cost ؎2 g/؎10 g Dual Axis  
iMEMS® Accelerometers  
with Digital Output  
a
ADXL202/ADXL210  
GENERAL DESCRIPTION  
FEATURES  
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).  
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  
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 (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.  
APPLICATIONS  
2-Axis Tilt Sensing  
Computer Peripherals  
Inertial Navigation  
Seismic Monitoring  
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.  
Vehicle Security Systems  
Battery Powered Motion Sensing  
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
SELF TEST  
X
FILT  
V
V
DD  
DD  
ADXL202/  
ADXL210  
X SENSOR  
R
FILT  
32k  
X OUT  
DEMOD  
DEMOD  
C
DC  
C
O
U
N
T
E
R
DUTY  
CYCLE  
MODULATOR  
(DCM)  
P  
OSCILLATOR  
Y SENSOR  
R
FILT  
32k⍀  
Y OUT  
Y
T2  
FILT  
COM  
R
SET  
C
Y
T2  
T1  
A(g) = (T1/T2 – 0.5)/12.5%  
0g = 50% DUTY CYCLE  
T2 = R  
/125M⍀  
SET  
i
MEMS 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.  
AIN2 =  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781/329-4700  
Fax: 781/326-8703  
World Wide Web Site: http://www.analog.com  
© Analog Devices, Inc., 1999  

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