陀螺仪芯片ADXRS300技术手册
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±300°/s Single Chip Yaw Rate
Gyro with Signal Conditioning
ADXRS300
FEATURES
Complete rate gyroscope on a single chip
Z-axis (yaw rate) response
High vibration rejection over wide frequency
2000 g powered shock survivability
Self-test on digital command
Temperature sensor output
Precision voltage reference output
Absolute rate output for precision applications
5 V single-supply operation
Ultrasmall and light (< 0.15 cc, < 0.5 gram)
APPLICATIONS
Vehicle chassis rollover sensing
Inertial measurement units
Platform stabilization
GENERAL DESCRIPTION
The ADXRS300 is a complete angular rate sensor (gyroscope)
that uses Analog Devices’ surface-micromachining process to
make a functionally complete and low cost angular rate sensor
integrated with all of the 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 (see Figure 4). A single external resistor can be used to
lower the scale factor. An external capacitor is used to set the
bandwidth. Other external capacitors are required for operation
(see Figure 5).
A precision reference and a temperature output are also
provided for compensation techniques. Two digital self-test
inputs electromechanically excite the sensor to test proper
operation of both sensors and the signal conditioning circuits.
The ADXRS300 is available in a 7 mm × 7 mm × 3 mm BGA
chip-scale package.
FUNCTIONAL BLOCK DIAGRAM
5G
4G
3A
5V
2G 1F
7F 6A 7D7C7B
1C
4A 5A 7E 6G
1D
2A
1E
3G
1B
PDD
12V
+
ADXRS300
47nF
22nF
100nF
22nF
CP2
CP1
PGND CP4
CP3 CP5
CHARGE PUMP/REG.
TEMP
PTAT
RATEOUT
2.5V
π DEMOD
RATE
SENSOR
SELF
TEST
100nF 100nF
CMID
AGND
AVCC
ST1
ST2
CORIOLIS SIGNAL CHANNEL
R
SEN1
R
SEN2
C
OUT
SUMJ
R
OUT
2.5V REF
≈
7k
Ω
±
35%
≈
7k
Ω
±
35%
180k
Ω
1%
RESONATOR LOOP
–
Figure 1.
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 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: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
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