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ADXRS649 Datasheet(PDF) 1 Page - Analog Devices

Part No. ADXRS649
Description  Fast Starting, ±20,000°/sec Vibration Rejecting Rate Gyro
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADXRS649 Datasheet(HTML) 1 Page - Analog Devices

 
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Fast Starting, ±20,000°/sec
Vibration Rejecting Rate Gyro
ADXRS649
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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
©2010 Analog Devices, Inc. All rights reserved.
FEATURES
High vibration rejection over wide frequency
Ultrafast startup: 3 ms
Measurement range extendable to ±50,000°/sec
10,000 g powered shock survivability
Ratiometric to referenced supply
5 V single-supply operation
Z-axis (yaw rate) response
−40°C to +105°C operation
Self-test on digital command
Ultrasmall and light (<0.15 cc, <0.5 gram)
Temperature sensor output
RoHS compliant
APPLICATIONS
Sports equipment
Industrial applications
Platform stabilization
High speed tachometry
GENERAL DESCRIPTION
The ADXRS649 is a complete angular rate sensor (gyroscope)
that uses the Analog Devices, Inc., patented high volume BiMOS
surface-micromachining process to make a complete gyro on
one chip. An advanced, differential, quad sensor design rejects
the influence of linear acceleration, enabling the ADXRS649
to offer rate sensing in harsh environments where shock and
vibration are present.
The output signal, RATEOUT (B1, A2), is a voltage proportional
to the angular rate about the axis normal to the top surface of
the package. The output is ratiometric with respect to a provided
reference supply. An external capacitor is used to set the band-
width. The measurement range is extendable to ±50,000°/sec
by adding an external resistor.
Low power consumption (3.5 mA) enables very low power
consumption, and ultrafast startup (3 ms) allows for quick
power cycling of the gyro. At 10 samples per second, a pair of
CR2032 coin cells can power the ADXRS649 for three months.
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 condi-
tioning circuits. The ADXRS649 is available in a 7 mm × 7 mm ×
3 mm CBGA chip scale package.
FUNCTIONAL BLOCK DIAGRAM
VDD
AGND
PGND
AVCC
ST2
ST1
TEMP
VRATIO
CP1
CP2
CP3
CP4
CP5
SUMJ
RATEOUT
DEMOD
ROUT
180k
Ω ±1%
22nF
2.2nF
22nF
100nF
100nF
100nF
DRIVE
AMP
MECHANICAL
SENSOR
CHARGE PUMP
AND VOLTAGE
REGULATOR
COUT
5V
5V
5V
(ADC REF)
AC
AMP
VGA
25k
AT 25°C
ADXRS649
25k
SELF-TEST
Figure 1.


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