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부품번호 | ADXRS645 기능 |
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기능 | Gyroscope | ||
제조업체 | Analog Devices | ||
로고 | |||
전체 10 페이지수
Data Sheet
High Temperature, Vibration Rejecting
±2000°/sec Gyroscope
ADXRS645
FEATURES
Innovative ceramic vertical mount package can be oriented
for pitch or roll rate response
Wide temperature range: −40°C to +175°C
Long life: guaranteed 1000 hours at TA = 175°C
High vibration rejection over wide frequency
10,000 g powered shock survivability
Ratiometric to referenced supply
5 V single-supply operation
Self-test on digital command
Temperature sensor output
APPLICATIONS
Down hole measurements for geological exploration
Extreme high temperature industrial applications
Severe mechanical environments
GENERAL DESCRIPTION
The ADXRS645 is a high performance angular rate sensor
with excellent vibration immunity for use in high temperature
environments. The ADXRS645 is manufactured using the
Analog Devices, Inc., patented high volume BiMOS surface-
micromachining process with years of proven field reliability.
An advanced, differential, quad sensor design provides superior
acceleration and vibration rejection.
The output signal, RATEOUT, is a voltage proportional to the
angular rate about the axis normal to the package lid. The
measurement range is a minimum of ±2000°/sec, and may be
extended to ±5000°/sec with the addition of a single external
resistor. The output is ratiometric with respect to a provided
reference supply. Other external capacitors are required for
operation.
A temperature output is provided for compensation techniques.
Two digital self-test inputs electromechanically excite the sensor
to test proper operation of both the sensor and the signal
conditioning circuits. The ADXRS645 is available in a 8 mm ×
9 mm × 3 mm, 15-lead brazed lead tri in-line package.
FUNCTIONAL BLOCK DIAGRAM
5V
(ADC REF)
100nF
5V
AVCC
100nF
AGND
DRIVE
AMP
ST2 ST1
SELF-TEST
MECHANICAL
SENSOR
TEMP VRATIO
ADXRS645
25kΩ 25kΩ
@ 25°C
AC
AMP
VGA
DEMOD
5V
VDD
100nF
PGND
CHARGE PUMP
AND VOLTAGE
REGULATOR
180kΩ ±1%
CP1 CP2 CP3 CP4 CP5 SUMJ
RATEOUT
22nF
22nF
100nF
COUT
Figure 1.
Rev. A
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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
©2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
ADXRS645
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Acceleration (Any Axis, 0.5 ms)
Unpowered
Powered
VDD, AVCC
VRATIO
ST1, ST2
Output Short-Circuit Duration (Any Pin to
Common)
Operating Temperature Range
Storage Temperature Range
Rating
10,000 g
10,000 g
−0.3 V to +6.6 V
AVCC
AVCC
Indefinite
−55°C to +175°C
−65°C to +185°C
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
Drops onto hard surfaces can cause shocks of greater than
10,000 g and can exceed the absolute maximum rating of the
device. Exercise care in handling to avoid damage.
Data Sheet
RATE SENSITIVE AXIS
The ADXRS645 produces a positive output voltage for clockwise
rotation about the axis normal to the package lid, that is,
clockwise when looking at the package lid.
Z-AXIS
RATE
AXIS
+
Figure 2. RATEOUT Signal Increases with Clockwise Rotation
ESD CAUTION
Rev. A | Page 4 of 10
4페이지 Data Sheet
40
35
30
25
20
15
10
5
0
ST2 OUTPUT CHANGE (°/sec)
Figure 11. ST2 Output Change at 25°C (VRATIO = 5 V)
45
40
35
30
25
20
15
10
5
0
SELF-TEST MISMATCH (%)
Figure 12. Self-Test Mismatch at 25°C (VRATIO = 5 V)
40
35
30
25
20
15
10
5
0
VTEMP OUTPUT (V)
Figure 13. VTEMP Output at 25°C
ADXRS645
2000
1800
1600
1400
1200
1000
800
600
400
200
0
–50
0 50 100 150
TEMPERATURE (°C)
Figure 14. ST2 Output Over Temperature
10000
200
1000
100
10
AVERAGE
+1σ
–1σ
1
0.01
0.1 1 10 100 1000 10000
AVERAGING TIME (Seconds)
Figure 15. Allan Variance at 25°C vs. Averaging Time
4.0
3.5
3.0
2.5
2.0
1.5
–50
0 50 100 150
TEMPERATURE (°C)
Figure 16. VTEMP Output Over Temperature
200
Rev. A | Page 7 of 10
7페이지 | |||
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |