ADXRS646-EP Datasheet, PDF (1/13 Pages) Analog Devices – High Stability, Low Noise Vibration Rejecting Yaw Rate Gyroscope

Enhanced Product
High Stability, Low Noise
Vibration Rejecting Yaw Rate Gyroscope
ADXRS646-EP
FEATURES
12°/hr bias stability
Z-axis (yaw rate) response
0.01°/√sec angle random walk
High vibration rejection over wide frequency
Measurement range extendable to a maximum of ±450°/sec
10,000 g powered shock survivability
Ratiometric to referenced supply
6 V single-supply operation
Self-test on digital command
Ultrasmall and light (<0.15 cc, <0.5 gram)
Temperature sensor output
Complete rate gyroscope on a single chip
RoHS compliant
ENHANCED PRODUCT FEATURES
Supports defense and aerospace applications (AQEC standard)
Extended industrial temperature range (−55°C to +105°C)
Controlled manufacturing baseline
1 assembly/test site
1 fabrication site
Enhanced product change notification
Qualification data available on request
APPLICATIONS
Industrial applications
Severe mechanical environments
Platform stabilization
GENERAL DESCRIPTION
The ADXRS646-EP is a high performance angular rate sensor
(gyroscope) that offers excellent vibration immunity. Bias stability
is a widely recognized figure of merit for high performance gyro-
scopes, but in real-world applications, vibration sensitivity is
often a more significant performance limitation and should be
considered in gyroscope selection. The ADXRS646-EP offers
superior vibration immunity and acceleration rejection as well
as a low bias drift of 12°/hr (typical), enabling it to offer rate sens-
ing in harsh environments where shock and vibration are present.
The ADXRS646-EP is manufactured using the Analog Devices,
Inc., patented high volume BiMOS surface-micromachining
process. An advanced, differential, quad sensor design provides
the improved acceleration and vibration rejection. The output
signal, RATEOUT, is a voltage proportional to angular rate about
the axis normal to the top surface of the package. The measure-
ment range is a minimum of ±250°/sec. The output is ratiometric
with respect to a provided reference supply. Other external capaci-
tors 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-EP is available in a 7 mm × 7 mm × 3 mm CBGA
chip-scale package. Additional application and technical infor-
mation can be found in the ADXRS646-EP data sheet.
FUNCTIONAL BLOCK DIAGRAM
3V TO 6V
(ADC REF)
100nF
6V
100nF
AV _CC
AGND
DRIVE
AMP
ST2 ST1
SELF-TEST
MECHANICAL
SENSOR
TEMP V_{RATIO ADXRS646-EP}
25kΩ 25kΩ
@ 25°C
AC
AMP
VGA
DEMOD
6V
V_DD
100nF
PGND
CHARGE PUMP
AND VOLTAGE
REGULATOR
R_OUT
180kΩ ±1%
CP1 CP2 CP3 CP4 CP5 SUMJ
RATEOUT
22nF
22nF
100nF
C_OUT
Figure 1.
Rev. 0
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