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陀螺仪传感器的测试方案及特点
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FEATURES
Complete rate gyroscope on a single chip Z-axis （yaw rate） response
High vibration rejection over wide frequency 2000 g powered shock survivability Ratiometric to referenced supply
5 V single-supply operation
105°C operation
Self-test on digital command
Ultrasmall and light （《0.15 cc， 《0.5 gram） Temperature sensor output
RoHS compliant
Qualified for automotive applications
APPLICATIONS
Navigation systems
Inertial measurement units
Platform stabilization
Robotics
GENERAL DESCRIPTION
The ADXRS624 is a complete angular rate sensor （gyroscope） that uses the Analog Devices， Inc.， surface-micromachining process to create a functionally complete and low cost angular rate sensor integrated with all required electronics on one chip. The manufacturing technique for this device is the same high volume BiMOS process used for high reliability automotive airbag accelerometers.
The output signal， RATEOUT （1B， 2A）， is a voltage proportional to angular rate about the axis normal to the top surface of the package. The output is ratiometric with respect to a provided reference supply. A single external resistor between SUMJ and RATEOUT can be used to lower the scale factor. An external capacitor sets the bandwidth. 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 ADXRS624 is available in a 7 mm × 7 mm × 3 mm BGA chip scale package.
FUNCTIONAL BLOCK DIAGRAM
+5V
（ADC REF）
100nF
+5V ST2ST1 TEMPVRATIO
AVCC ADXRS624
100nF SELF-TEST 25kΩ25kΩ
AGND AT 25°C
DEMOD
DRIVEMECHANICALACVGA
SENSOR
AMP AMP
+5VVDD 200kΩ ±5%
CHARGE PUMP
100nF AND VOLTAGE
PGNDREGULATOR
CP1CP2CP3CP4CP5 SUMJRATEOUT
100nF -001
22nF22nF COUT 08999
Figure 1. ADXRS624 Block Diagram
Rev. A
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. Trademarks and registered trademarks are the property of their respective owners.
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 ©2010 Analog Devices， Inc. All rights reserved.
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