ANALOG DEVICES ADXRS624 Service Manual
ADXRS624
V
DD
AGND
PGND
AV
CC
ST2 ST1 TEMP V
RATIO
CP1 CP2 CP3 CP4 CP5 SUMJ RATEOUT
DEMOD
200kΩ ±5%
22nF
100nF
22nF
100nF
100n
F
100nF
DRIVE
AMP
MECHANICAL
SENSOR
CHARGE PUMP
AND VOLTAGE
REGULATOR
C
OUT
+5V
+5V
+5V
(ADC REF)
AC
AMP
VGA
25kΩ
AT 25°C
ADXRS624
25kΩ
SELF-TEST
08999-001
FEATURES
Complete rate gyroscope on a single chip
Z-axis (yaw rate) response
High vibration rejection over wide frequency
2000 g powered shock survivability
Ratiometric to referenced supply
5 V single-supply operation
105°C operation
Self-test on digital command
Ultrasmall and light (<0.15 cc, <0.5 gram)
Temperature sensor output
RoHS compliant
Qualified for automotive applications
APPLICATIONS
Navigation systems
Inertial measurement units
Platform stabilization
Robotics
±50°/s Yaw Rate Gyro
GENERAL DESCRIPTION
T
he ADXRS624 is a complete angular rate sensor (gyroscope)
that uses the Analog Devices, Inc., surface-micromachining
process to create a functionally complete and low cost angular
rate sensor integrated with all 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. The output is ratiometric with respect to a provided
reference supply. A single external resistor between SUMJ and
RATEOUT can be used to lower the scale factor. An external
capacitor sets the bandwidth. Other external capacitors are
required for operation.
A temperature output is provided for compensation techniques.
Two digital self-test inputs electromechanically excite the sensor
to test proper operation of both the sensor and the signal
conditioning circuits. The ADXRS624 is available in a 7 mm ×
7 mm × 3 mm BGA chip scale package.
FUNCTIONAL BLOCK DIAGRAM
ADXRS624
Figure 1. ADXRS624 Block Diagram
Rev. A
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