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ADXꢃ 401
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 survivability
Self-test on digital command
The ADXRS401 is a functionally complete and low cost angular
rate sensor (gyroscope), integrated with all of the required
electronics on one chip. It is manufactured using Analog
Devices’ surface-micromachining technique, the same high
volume BIMOS process used for high reliability automotive
airbag accelerometers. It is available in a 7 mm × 7 mm × 3 mm
BGA surface-mount package.
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 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 required for operation
(see Figure 1).
Ultra small and light (< 0.15 cc, < 0.5 gram)
APPLICATIONS
GPS navigation systems
Image stabilization
Inertial measurement units
Platform stabilization
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.
FUNCTIONAL BLOCK DIAGRAM
–
+
5V
100nF
C
OUT
100nF
AGND
SUMJ
CMID
AVCC
3A
2G
1F
1D
1C
ST1
ST2
5G
4G
SELF
TEST
R
OUT
CORIOLIS SIGNAL CHANNEL
R
S
2
1
SEN
180kΩ 1%
SEN
π
DEMOD
RATE
SENSOR
1B
2A
≈9kΩ ±35% ≈9kΩ ±35%
RATEOUT
RESONATOR LOOP
2.5V REF
1E 2.5V
PTAT
3G
TEMP
12V
CHARGE PUMP/REG.
PDD
4A
5A
7E
6G
7F
6A
7B
7C
CP3
7D
CP5
CP2
PGND
100nF
CP4
CP1
22nF
1µF
ADXRS401
22nF
Figure 1.
Rev. 0
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.
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Fax: 781.326.8703
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