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AD22304 Scheda tecnica(PDF) 1 Page - Analog Devices

Il numero della parte AD22304
Spiegazioni elettronici  짹80째/s Single Chip Yaw Rate Gyro with Signal Conditioning
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

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±80°/s Single Chip Yaw Rate
Gyro with Signal Condition
ing
AD22304
FEATURES
Complete rate gyroscope on a single chip
Z-axis (yaw rate) response
High vibration rejection over wide frequency
0.05°/s/√Hz noise
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
GPS navigation systems
Vehicle stability control
Inertial measurement units
Guidance and control
Platform stabilization
GENERAL DESCRIPTION
The AD22304 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 propor-
tional to the angular rate about the axis normal to the top sur-
face of the package (see Figure 2). 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 re-
quired for operation (see Figure 22).
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 the operation of
both sensors and the signal conditioning circuits. The AD22304
is available in a 7 mm × 7 mm × 3 mm BGA surface-mount
package.
FUNCTIONAL BLOCK DIAGRAM
5G
4G
3A
5V
2G
1F
7F
6A
7D
7C
7B
1C
4A
5A
7E
6G
1D
2A
1E
3G
1B
PDD
12V
+
ADXRS150
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
RSEN1
RSEN2
COUT
SUMJ
ROUT
2.5V REF
≈9kΩ ±35% ≈9kΩ ±35%
180k
Ω 1%
RESONATOR LOOP
Figure 1.
Rev. 0-Preliminary
Information furnished by Analog Devices is believed to be accurate and reli-
able. 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 Ana-
log 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.
AD22304


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