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PDF ADXL202 Data sheet ( Hoja de datos )
| Número de pieza | ADXL202 | |
| Descripción | Low Cost +-2 g/+-10 g Dual Axis iMEMS Accelerometers with Digital Output | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ADXL202 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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a
Low Cost ؎2 g/؎10 g Dual Axis
iMEMS® Accelerometers
with Digital Output
ADXL202/ADXL210
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
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 (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.
FUNCTIONAL BLOCK DIAGRAM
+3.0V TO +5.25V
VDD
VDD
CX
XFILT
SELF TEST
ADXL202/
X SENSOR
RFILT
ADXL210
32k⍀
X OUT
CDC
DEMOD
OSCILLATOR
DUTY
CYCLE
MODULATOR
(DCM)
C
O
U
N P
T
DEMOD
RFILT
32k⍀
Y OUT
E
R
Y SENSOR
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
1 page  
9
8
7
6
5
4
3
2
1
0
11.3 11.5 11.7 11.9 12.2 12.4 12.6 12.8 13.1 13.3 13.5 13.7
DUTY CYCLE OUTPUT – % per g
Figure 8. Typical Sensitivity per g at +25°C
14
12
10
8
6
4
2
0
0.01F
500Hz
0.047F
0.1F
100Hz
CX, CY
50Hz
BANDWIDTH
0.47F
10Hz
Figure 9. Typical Noise at XFILT Output
ADXL202/ADXL210
14
CFILT = 0.01F
12 BW = 500Hz
T2 = 1ms
10
CFILT = 0.047F
BW = 100Hz
8 CFILT = 0.1F
BW = 50Hz
6 CFILT = 0.47F
BW = 10Hz
4
2
0
1 4 16 64
NUMBER OF AVERAGE SAMPLES
Figure 10. Typical Noise at Digital Outputs
20
18
16
14
12
10
8
6
4
2
0
DEGREES OF MISALIGNMENT
Figure 11. Rotational Die Alignment
REV. B
–5–
5 Page 
ADXL202/ADXL210
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
14-Lead CERPAK
(QC-14)
0.390 (9.906)
MAX
14
0.291 (7.391)
0.285 (7.239)
1
8
0.419 (10.643)
0.394 (10.008)
7
PIN 1
0.020 (0.508)
0.004 (0.102)
SEATING
PLANE
0.300 (7.62)
0.195 (4.953)
0.115 (2.921)
0.345 (8.763)
0.290 (7.366)
0.215 (5.461)
0.119 (3.023)
0.050
(1.27)
BSC
0.020 (0.508)
0.013 (0.330)
0.0125 (0.318)
0.009 (0.229)
8°
0°
0.050 (1.270)
0.016 (0.406)
REV. B
–11–
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet ADXL202.PDF ] | |
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