Datasheet ADXRS649 (Analog Devices)

Fast Starting, ±20,000°/sec Vibration Rejecting Rate Gyro Data Sheet ADXRS649 FEATURES GENERAL DESCRIPTION High vibration rejection over wide frequency
The ADXRS649 is a complete angular rate sensor (gyroscope)
Ultrafast startup: 3 ms
that uses the Analog Devices, Inc., patented high volume BiMOS
Measurement range extendable to ±50,000°/sec
surface-micromachining process to make a complete gyro on
10,000 g powered shock survivability
one chip. An advanced, differential, quad sensor design rejects
Ratiometric to referenced supply
the influence of linear acceleration, enabling the ADXRS649
5 V single-supply operation
to offer rate sensing in harsh environments where shock and
Z-axis (yaw rate) response
vibration are present.
−40°C to +105°C operation
The output signal, RATEOUT (B1, A2), is a voltage proportional
Self-test on digital command
to the angular rate about the axis normal to the top surface of
Ultrasmall and light (<0.15 cc, <0.5 gram)
the package. The output is ratiometric with respect to a provided
Temperature sensor output
reference supply. An external capacitor is used to set the band-
RoHS compliant
width. The measurement range is extendable to ±50,000°/sec
APPLICATIONS
by adding an external resistor. Low power consumption (3.5 mA) enables very low power
Sports equipment
consumption, and ultrafast startup (3 ms) allows for quick
Industrial applications
power cycling of the gyro. At 10 samples per second, a pair of
Platform stabilization
CR2032 coin cel s can power the ADXRS649 for three months.
High speed tachometry
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 ADXRS649 is available in a 7 mm × 7 mm × 3 mm CBGA chip scale package.
FUNCTIONAL BLOCK DIAGRAM 5V (ADC REF) 100nF 5V ST2 ST1 TEMP VRATIO ADXRS649 AVCC 100nF SELF-TEST 25kΩ 25kΩ AT 25°C AGND DEMOD MECHANICAL DRIVE AC VGA AMP SENSOR AMP ROUT 5V 180kΩ ±1% VDD CHARGE PUMP AND VOLTAGE 100nF REGULATOR PGND CP1 CP2 CP3 CP4 CP5 SUMJ RATEOUT
001
2.2nF 22nF 22nF COUT
09573- Figure 1.
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Document Outline Features Applications General Description Functional Block Diagram Revision History Specifications Absolute Maximum Ratings Rate Sensitive Axis ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Setting the Bandwidth Temperature Output and Calibration Modifying the Measurement Range Null Bias Adjustment Self-Test Function Continuous Self-Test Outline Dimensions Ordering Guide