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부품번호 | ADXL325 기능 |
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기능 | Accelerometer | ||
제조업체 | Analog Devices | ||
로고 | |||
전체 17 페이지수
FEATURES
3-axis sensing
Small, low profile package
4 mm × 4 mm × 1.45 mm LFCSP
Low power: 350 μA typical
Single-supply operation: 1.8 V to 3.6 V
10,000 g shock survival
Excellent temperature stability
Bandwidth adjustment with a single capacitor per axis
RoHS/WEEE lead-free compliant
APPLICATIONS
Cost-sensitive, low power, motion- and tilt-sensing applications
Mobile devices
Gaming systems
Disk drive protection
Image stabilization
Sports and health devices
Small, Low Power, 3-Axis ±5 g
Accelerometer
ADXL325
GENERAL DESCRIPTION
The ADXL325 is a small, low power, complete 3-axis accelerometer
with signal conditioned voltage outputs. The product measures
acceleration with a minimum full-scale range of ±5 g. It can
measure the static acceleration of gravity in tilt-sensing applications,
as well as dynamic acceleration, resulting from motion, shock,
or vibration.
The user selects the bandwidth of the accelerometer using
the CX, CY, and CZ capacitors at the XOUT, YOUT, and ZOUT pins.
Bandwidths can be selected to suit the application with a range
of 0.5 Hz to 1600 Hz for X and Y axes and a range of 0.5 Hz to
550 Hz for the Z axis.
The ADXL325 is available in a small, low profile, 4 mm ×
4 mm × 1.45 mm, 16-lead, plastic lead frame chip scale package
(LFCSP_LQ).
FUNCTIONAL BLOCK DIAGRAM
+3V
VS
ADXL325
~32kΩ XOUT
OUTPUT AMP
CDC
3-AXIS
SENSOR
AC AMP
DEMOD
~32kΩ
OUTPUT AMP
CX
YOUT
CY
~32kΩ
OUTPUT AMP
ZOUT
CZ
COM
ST
Figure 1.
Rev. 0
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. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2009 Analog Devices, Inc. All rights reserved.
ADXL325
SPECIFICATIONS
TA = 25°C, VS = 3 V, CX = CY = CZ = 0.1 μF, acceleration = 0 g, unless otherwise noted. All minimum and maximum specifications are
guaranteed. Typical specifications are not guaranteed.
Table 1.
Parameter
SENSOR INPUT
Measurement Range
Nonlinearity
Package Alignment Error
Interaxis Alignment Error
Cross-Axis Sensitivity1
SENSITIVITY (RATIOMETRIC)2
Sensitivity at XOUT, YOUT, ZOUT
Sensitivity Change Due to Temperature3
ZERO g BIAS LEVEL (RATIOMETRIC)
0 g Voltage at XOUT, YOUT, ZOUT
0 g Offset vs. Temperature
NOISE PERFORMANCE
Noise Density XOUT, YOUT, ZOUT
FREQUENCY RESPONSE4
Bandwidth XOUT, YOUT5
Bandwidth ZOUT5
RFILT Tolerance
Sensor Resonant Frequency
SELF TEST6
Logic Input Low
Logic Input High
ST Actuation Current
Output Change at XOUT
Output Change at YOUT
Output Change at ZOUT
OUTPUT AMPLIFIER
Output Swing Low
Output Swing High
POWER SUPPLY
Operating Voltage Range
Supply Current
Turn-On Time7
TEMPERATURE
Operating Temperature Range
Conditions
Each axis
Percent of full scale
Min
±5
Each axis
VS = 3 V
VS = 3 V
VS = 3 V
156
1.3
No external filter
No external filter
Self test 0 to 1
Self test 0 to 1
Self test 0 to 1
No load
No load
VS = 3 V
No external filter
−90
+90
+90
1.8
−40
Typ
±6
±0.2
±1
±0.1
±1
174
±0.01
1.5
±1
250
1600
550
32 ± 15%
5.5
+0.6
+2.4
+60
−190
+190
+320
0.1
2.8
350
1
Max Unit
g
%
Degrees
Degrees
%
192 mV/g
%/°C
1.7 V
mg/°C
μg/√Hz rms
Hz
Hz
kΩ
kHz
−350
+350
+580
V
V
μA
mV
mV
mV
V
V
3.6 V
μA
ms
+85 °C
1 Defined as coupling between any two axes.
2 Sensitivity is essentially ratiometric to VS.
3 Defined as the output change from ambient-to-maximum temperature or ambient-to-minimum temperature.
4 Actual frequency response controlled by user-supplied external filter capacitors (CX, CY, CZ).
5 Bandwidth with external capacitors = 1/(2 × π × 32 kΩ × C). For CX, CY = 0.003 μF, bandwidth = 1.6 kHz. For CZ = 0.01 μF, bandwidth = 500 Hz. For CX, CY, CZ = 10 μF,
bandwidth = 0.5 Hz.
6 Self test response changes cubically with VS.
7 Turn-on time is dependent on CX, CY, CZ and is approximately 160 × CX or CY or CZ + 1 ms, where CX, CY, CZ are in μF.
Rev. 0 | Page 3 of 16
4페이지 ADXL325
TYPICAL PERFORMANCE CHARACTERISTICS
N > 1000 for all typical performance plots, unless otherwise noted.
50
40
30
20
10
0
1.46 1.47 1.48 1.49 1.5 1.51 1.52 1.53
OUTPUT (V)
Figure 3. X-Axis Zero g Bias at 25°C, VS = 3 V
1.54
40
30
20
10
0
1.46 1.47 1.48 1.49 1.50 1.51 1.52 1.53 1.54
OUTPUT (V)
Figure 4. Y-Axis Zero g Bias at 25°C, VS = 3 V
30
25
20
15
10
5
0
1.46 1.47 1.48 1.49 1.50 1.51 1.52 1.53
OUTPUT (V)
Figure 5. Z-Axis Zero g Bias at 25°C, VS = 3 V
1.54
60
50
40
30
20
10
0
–0.22
–0.20
–0.18
–0.16
–0.14
–0.12
VOLTAGE (V)
Figure 6. X-Axis Self Test Response at 25°C, VS = 3 V
60
50
40
30
20
10
0
0.12 0.13 0.14 0.15 0.16 0.17 0.18 0.19 0.20 0.21 0.22
VOLTAGE (V)
Figure 7. Y-Axis Self Test Response at 25°C, VS = 3 V
60
50
40
30
20
10
0
0.26 0.27 0.28 0.29 0.30 0.31 0.32 0.33 0.34 0.35 0.36
VOLTAGE (V)
Figure 8. Z-Axis Self Test Response at 25°C, VS = 3 V
Rev. 0 | Page 6 of 16
7페이지 | |||
구 성 | 총 17 페이지수 | ||
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |