ANALOG DEVICES ADXRS613 Service Manual
V
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±150°/sec Yaw Rate Gyroscope
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
APPLICATIONS
Inertial measurement units
Platform stabilization
Robotics
ADXRS613
GENERAL DESCRIPTION
The ADXRS613 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 the angular rate about the axis that is 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 ADXRS613 is available in a 7 mm ×
7 mm × 3 mm BGA chip scale package.
FUNCTIONAL BLOCK DIAGRAM
+5
(ADC REF)
+5V
AV
CC
100nF
AGND
+5V
V
DD
100nF
PGND
ST2 ST1 TEMP V
SELF-TEST
AMP
22nF
MECHANICAL
SENSOR
CHARGE PUMP
AND VOLTAGE
REGULATOR
22nF
Figure 1.
DRIVE
CP1 CP2 CP3 CP4 CP5
RATIO
25kΩ
25kΩ
@ 25°C
AC
AMP
SUMJ RATEOUT
100nF
C
OUT
VGA
180kΩ ± 1%
100nF
ADXRS613
DEMOD
06921-001
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2008 Analog Devices, Inc. All rights reserved.
ADXRS613
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TABLE OF CONTENTS
Features.............................................................................................. 1
Theory of Operation .........................................................................9
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
Rate-Sensitive Axis....................................................................... 4
ESD Caution.................................................................................. 4
Pin Configuration and Function Descriptions............................. 5
Typical Performance Characteristics ............................................. 6
REVISION HISTORY
2/08—Revision 0: Initial Version
Setting Bandwidth.........................................................................9
Temperature Output and Calibration.........................................9
Calibrated Performance................................................................9
ADXRS613 and Supply Ratiometricity ................................... 10
Null Adjustment ......................................................................... 10
Self-Test Function ...................................................................... 10
Continuous Self-Test.................................................................. 10
Outline Dimensions....................................................................... 11
Ordering Guide .......................................................................... 11
Rev. 0 | Page 2 of 12
ADXRS613
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SPECIFICATIONS
All minimum and maximum specifications are guaranteed. Typical specifications are not guaranteed.
T
= −40°C to +105°C, VS = AV
A
= 100 µA, ±1 g, unless otherwise noted.
I
OUT
Table 1.
Parameter Conditions
SENSITIVITY (RATIOMETRIC)
Measurement Range
2
Full-scale range over specifications range ±150 °/sec
Initial and Over Temperature
Temperature Drift
3
±3 %
Nonlinearity Best fit straight line 0.1 % of FS
NULL (RATIOMETRIC)
1
Null −40°C to +105°C 2.5 V
Null Drift Over Temperature −40°C to +105°C
Linear Acceleration Effect Any axis 0.1 °/sec/g
NOISE PERFORMANCE
Rate Noise Density TA = 25°C 0.04 °/sec/√Hz
FREQUENCY RESPONSE
4
Bandwidth
Sensor Resonant Frequency 14.5 kHz
SELF-TEST (RATIOMETRIC)1
ST1 RATEOUT Response
ST2 RATEOUT Response ST2 pin from Logic 0 to Logic 1 500 1000 mV
Logic 1 Input Voltage 0.8 × V
Logic 0 Input Voltage 0.2 × V
Input Impedance To common 50 kΩ
TEMPERATURE SENS O R (RATIOMETR I C)
V
at 25°C Load = 100 MΩ 2.35 2.5 2.65 V
OUT
Scale Factor
Load to V
5
@ 25°C, V
S
Load to Common
TURN-ON TIME Power on to ±½°/sec of final 50
OUTPUT DRIVE CAPABILITY
Current Drive For rated specifications 200
Capacitive Load Drive 1000
POWER SUPPLY
Operating Voltage (VS) 4.75 5.00 5.25
V
Input 3 VS
RATIO
Supply Current 3.5 5.0
TEMPERATURE RANGE
Specified Performance
1
Parameter is linearly ratiometric with V
2
The maximum range possible, including output swing range, initial offset, sensitivity, offset drift, and sensitivity drift at 5 V supplies.
3
From +25°C to −40°C or from +25°C to +105°C.
4
Adjusted by external capacitor, C
5
For a change in temperature from 25°C to 26°C. V
= V
CC
= 5 V, V
DD
= AVCC, angular rate = 0°/sec, bandwidth = 80 Hz (C
RATIO
= 0.01 µF),
OUT
ADXRS613BBGZ
Min Typ Max
1
Clockwise rotation is positive output
11.25 12.5 13.75 mV/°/sec
±250
1 3000 Hz
ST1 pin from Logic 0 to Logic 1 −500 −1000 mV
V
RATIO
RATIO
1
= 5 V 9.1 mV/°C
RATIO
25
25
–40 +105 °C
.
RATIO
.
OUT
is ratiometric to V
TEMP
. See the Tem section for more details. perature Output and Calibration
RATIO
Unit
mV
V
kΩ
kΩ
ms
μA
pF
V
V
mA
Rev. 0 | Page 3 of 12
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ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter Rating
Acceleration (Any Axis, 0.5 ms)
Unpowered 2000 g
Powered 2000 g
VDD, AV
CC
V
AVCC
RATIO
Output Short-Circuit Duration
–0.3 V to +6.0 V
Indefinite
(Any Pin to Common)
Operating Temperature Range –55°C to +125°C
Storage Temperature Range –65°C to +150°C
Stresses above those listed under the Absolute Maximum
Ratings may cause permanent damage to the device. This is a
stress rating only; functional operation of the device at these or
any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Drops onto hard surfaces can cause shocks of >2000 g and can
exceed the absolute maximum rating of the device. Exercise
care during handling to avoid damage.
RATE-SENSITIVE AXIS
The ADXRS613 is a Z-axis rate-sensing device (also called a
yaw rate-sensing device). It produces a positive-going output
voltage for clockwise rotation about the axis normal to the
package top, that is, clockwise when looking down at the
package lid.
RATE AXIS
VCC = 5V
LONGIT UDINAL
AXIS
A1
ABCDEFG
LATERAL AXIS
Figure 2. RATEOUT Signal Increases with Clockwise Rotation
+
7
1
GND
V
RATIO
RATE OUT
4.75V
/2
RATE IN
0.25V
ESD CAUTION
6921-002
Rev. 0 | Page 4 of 12
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