± ±330°/s SinglsꢀCSꢁsꢂYasꢃYꢄls
GyrosaSꢄCs SniYgsꢀoidSꢄSoiSin
s
ADXꢃ ±33
FEATURES
GENERAL DESCRIPTION
Complete rate gyroscope on a single chip
Z-axis (yaw rate) response
High vibration rejection over wide frequency
2000 g powered shock operation
Self-test on digital command
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 vol-
ume BIMOS process used for high reliability automotive airbag
accelerometers.
Temperature sensor output
Precision voltage reference output
Absolute rate output for precision applications
5 V single-supply operation
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 3). 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 4).
Ultrasmall and light (< 0.15 cc, < 0.5 gram)
APPLICATIONS
Vehicle chassis rollover sensing
Inertial measurement units
Platform stabilization
A precision reference and a temperature output are also pro-
vided 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
–
+
5V
C
OUT
100nF
100nF
SUMJ
AGND
CMID
AVCC
3A
1D
1C
2G
1F
ST1
5G
SELF
TEST
R
OUT
CORIOLIS SIGNAL CHANNEL
R
ST2 4G
R
180k
Ω
1%
SEN1
35%
SEN2
π DEMOD
RATE
1B
2A
≈7k
Ω
±
≈
7kΩ
±
35%
SENSOR
RATEOUT
2.5V
RESONATOR LOOP
2.5V REF
PTAT
1E
3G
TEMP
12V
CHARGE PUMP/REG.
PDD
4A
CP2
5A
7E
6G
PGND
7F
6A
7B
7C
CP3
7D
CP5
CP4
CP1
22nF
47nF
ADXRS300
100nF
22nF
Figure 1.
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 companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
www.analog.com
© 2003 Analog Devices, Inc. All rights reserved.