ADXRS642 Datasheet, PDF (1/10 Pages) Analog Devices – Vibration Rejecting ±250°/s Yaw Rate Gyro

Preliminary Technical Data
FEATURES
Complete rate gyroscope on a single chip
Z-axis (yaw rate) response
20°/hour bias stability
0.02°/√second angle random walk
High vibration rejection over wide frequency
10,000 g powered shock survivability
Ratiometric to referenced supply
5 V single-supply operation
−40°C to +105°C operation
Self-test on digital command
Ultrasmall and light (<0.15 cc, <0.5 gram)
Temperature sensor output
RoHS compliant
APPLICATIONS
Industrial applications
Inertial Measurement Units
Severe Mechanical Environments
Platform stabilization
Vibration Rejecting ±250°/s Yaw Rate Gyro
ADXRS642
GENERAL DESCRIPTION
The ADXRS642 is a complete angular rate sensor (gyroscope)
that uses the Analog Devices, Inc., 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 a patented high
volume BiMOS process with years of proven field reliability.
The ADXRS642 is an industrial grade gyroscope that is 100%
pin, package, temperature, and function compatible with the
ADXRS622 and ADXRS652 – while offering enhanced
vibration rejection
The output signal, RATEOUT (1B, 2A), is a voltage propor-
tional to angular rate about the axis normal to the top surface
of the package. The measurement range is a minimum of
±250°/s. The output is ratiometric with respect to a provided
reference supply. 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 condi-
tioning circuits. The ADXRS642 is available in a 7 mm × 7 mm ×
3 mm BGA chip-scale package.
FUNCTIONAL BLOCK DIAGRAM
3 to 5V
(ADC REF)
100nF
5V
AV _CC
100nF
AGND
DRIVE
AMP
ST2 ST1
SELF-TEST
MECHANICAL
SENSOR
TEMP V_RATIO
25k ^25k
@ 25°C
ADXRS642
AC
AMP
VGA
DEMOD
5V
V_DD
100nF
PGND
CHARGE PUMP
AND VOLTAGE
REGULATOR
CP1 CP2 CP3 CP4 CP5 ^SUMJ
180k ±1%
RATEOUT
22nF
22nF
100nF
C_OUT
08820-001
Figure 1. Block Diagram
Rev. Pr A
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