ADXRS300_15 Datasheet, PDF (1/8 Pages) Analog Devices – 300/s Single Chip Yaw Rate Gyro with Signal Conditioning

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
±300°/s Single Chip Yaw Rate
Gyro with Signal Conditioning
ADXRS300
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.
ST1 5G
ST2 4G
FUNCTIONAL BLOCK DIAGRAM
AVCC
3A
+ _5V –
100nF
AGND
2G
1F
100nF
CMID
1D
C_OUT
SUMJ
1C
SELF
TEST
RATE
SENSOR
CORIOLIS SIGNAL CHANNEL
π DEMOD
R_SEN1
R_SEN2
≈7kΩ ±35% ≈7kΩ ±35%
RESONATOR LOOP
R_OUT
180kΩ 1%
1B
RATEOUT
2A
2.5V REF
1E 2.5V
12V
CHARGE PUMP/REG.
PTAT
3G TEMP
ADXRS300
PDD
4A 5A
7E
CP2
CP1
22nF
6G
7F
PGND
100nF
6A 7B 7C
CP4 CP3
7D
CP5
47nF
22nF
Figure 1.
Rev. B
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