Datasheet ADXRS646 (Analog Devices)

High Stability, Low Noise Vibration Rejecting Yaw Rate Gyroscope Data Sheet ADXRS646 FEATURES GENERAL DESCRIPTION 12°/hr bias stability
The ADXRS646 is a high performance angular rate sensor
Z-axis (yaw rate) response
(gyroscope) that offers excellent vibration immunity. Bias
0.01°/√sec angle random walk
stability is a widely-recognized figure of merit for high
High vibration rejection over wide frequency
performance gyroscopes, but in real-world applications,
Measurement range extendable to a maximum of ±450°/sec
vibration sensitivity is often a more significant performance
10,000 g powered shock survivability
limitation and should be considered in gyroscope selection. The
Ratiometric to referenced supply
ADXRS646 offers superior vibration immunity and acceleration
6 V single-supply operation
rejection as well as a low bias drift of 12°/hr (typical), enabling it
−40°C to +105°C operation
to offer rate sensing in harsh environments where shock and
Self-test on digital command
vibration are present.
Ultrasmall and light (<0.15 cc, <0.5 gram)
The ADXRS646 is manufactured using the Analog Devices,
Temperature sensor output
Inc., patented high volume BiMOS surface-micromachining
Complete rate gyroscope on a single chip
process. An advanced, differential, quad sensor design provides
RoHS compliant
the improved acceleration and vibration rejection. The output
APPLICATIONS
signal, RATEOUT, is a voltage proportional to angular rate
Industrial applications
about the axis normal to the top surface of the package. The
Severe mechanical environments
measurement range is a minimum of ±250°/sec. The output is
Platform stabilization
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 ADXRS646 is available in a 7 mm × 7 mm × 3 mm CBGA chip-scale package.
FUNCTIONAL BLOCK DIAGRAM 3V TO 6V (ADC REF)100nF 6V ST2 ST1 TEMP VRATIO AV ADXRS646 CC 100nF SELF-TEST 25kΩ 25kΩ @ 25°C AGND DEMOD DRIVE MECHANICAL AC VGA AMP SENSOR AMP R 6V OUT VDD 180kΩ ±1% CHARGE PUMP AND VOLTAGE 100nF REGULATOR PGND CP1 CP2 CP3 CP4 CP5 SUMJ RATEOUT 100nF
001
22nF 22nF C
71-
OUT
097 Figure 1.
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Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS RATE SENSITIVE AXIS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION SETTING BANDWIDTH TEMPERATURE OUTPUT AND CALIBRATION SUPPLY RATIOMETRICITY NULL ADJUSTMENT SELF-TEST FUNCTION CONTINUOUS SELF-TEST MODIFYING THE MEASUREMENT RANGE IMMUNITY TO VIBRATION OUTLINE DIMENSIONS ORDERING GUIDE