ADXRS150 Datasheet, PDF (1/12 Pages) Analog Devices – ±150°/s Single Chip Yaw Rate Gyro with Signal Conditioning

±150°/s Single Chip Yaw Rate
Gyro with Signal Conditioning
ADXRS150
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 operation
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 ADXRS150 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 the 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 21).
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
ADXRS150 is available in a 7 mm × 7 mm × 3 mm BGA
surface-mount 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
≈9kΩ ±35% ≈9kΩ ±35%
RESONATOR LOOP
R_OUT
180kΩ 1%
1B
RATEOUT
2A
CHARGE PUMP/REG.
2.5V REF
PTAT
12V
1E 2.5V
3G TEMP
ADXRS150
PDD
4A 5A
7E
CP2
CP1
22nF
6G
7F
PGND
100nF
Figure 1.
6A 7B 7C
7D
CP4 CP3 CP5
47nF
22nF
Rev. A
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