High Stability, Low Noise
Vibration Rejecting Yaw Rate Gyroscope
ADXRS646-EP
Enhanced Product
FEATURES
GENERAL DESCRIPTION
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
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 gyroscopes, 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 sensing 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 measurement range is a minimum of ±250°/sec. The output is ratiometric
with respect to a provided reference supply. Other external capacitors are required for operation.
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
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.
APPLICATIONS
Industrial applications
Severe mechanical environments
Platform stabilization
The ADXRS646-EP is available in a 7 mm × 7 mm × 3 mm CBGA
chip-scale package. Additional application and technical information can be found in the ADXRS646-EP data sheet.
FUNCTIONAL BLOCK DIAGRAM
3V TO 6V
(ADC REF)
6V
ST2
AV CC
100nF
ST1
TEMP
SELF-TEST
25kΩ
@ 25°C
VRATIO
100nF
ADXRS646-EP
25kΩ
AGND
DEMOD
MECHANICAL
SENSOR
DRIVE
AMP
6V
AC
AMP
VGA
ROUT
VDD
180kΩ ±1%
CHARGE PUMP
AND VOLTAGE
REGULATOR
100nF
PGND
SUMJ
RATEOUT
100nF
22nF
22nF
COUT
10046-001
CP1 CP2 CP3 CP4 CP5
Figure 1.
Rev. 0
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
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
©2012 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
ADXRS646-EP
Enhanced Product
TABLE OF CONTENTS
Features .............................................................................................. 1
Absolute Maximum Ratings ............................................................4
Enhanced Product Features ............................................................ 1
Rate Sensitive Axis ........................................................................4
Applications ....................................................................................... 1
ESD Caution...................................................................................4
General Description ......................................................................... 1
Pin Configuration and Function Descriptions..............................5
Functional Block Diagram .............................................................. 1
Typical Performance Characteristics ..............................................6
Revision History ............................................................................... 2
Outline Dimensions ..........................................................................9
Specifications..................................................................................... 3
Ordering Guide .............................................................................9
REVISION HISTORY
10/12—Revision 0: Initial Version
Rev. 0 | Page 2 of 12
Enhanced Product
ADXRS646-EP
SPECIFICATIONS
All minimum and maximum specifications are guaranteed. Typical specifications are not guaranteed.
TA = 25°C, VS = AVCC = VDD = 6 V, VRATIO = AVCC, angular rate = 0°/sec, bandwidth = 80 Hz (COUT = 0.01 µF), IOUT = 100 µA, ±1 g, unless
otherwise noted.
Table 1.
Parameter
SENSITIVITY 1
Measurement Range 2
Initial
Temperature Drift 3
Nonlinearity
NULL1
Null
Temperature Drift3
Linear Acceleration Effect
Vibration Rectification
NOISE PERFORMANCE
Rate Noise Density
Rate Noise Density
Resolution Floor
FREQUENCY RESPONSE
Bandwidth 4
Sensor Resonant Frequency
SELF-TEST1
ST1 RATEOUT Response
ST2 RATEOUT Response
ST1 to ST2 Mismatch 5
Logic 1 Input Voltage
Logic 0 Input Voltage
Input Impedance
TEMPERATURE SENSOR1
VOUT at 25°C
Scale Factor 6
Load to VS
Load to Common
TURN-ON TIME6
OUTPUT DRIVE CAPABILITY
Current Drive
Capacitive Load Drive
POWER SUPPLY
Operating Voltage (VS)
Quiescent Supply Current
TEMPERATURE RANGE
Specified Performance
Test Conditions/Comments
Clockwise rotation is positive output
Full-scale range over specifications range
Min
Typ
±250
8.5
±300
9
±3
0.01
2.7
Any axis
25 g rms, 50 Hz to 5 kHz
3.0
±3
0.015
0.0001
TA ≤ 25°C
TA ≤ 105°C
TA = 25°C, 1 minute to 1 hour in-run
0.01
0.015
12
Best fit straight line
−40°C to +105°C
±3 dB user adjustable up to specification
15.5
ST1 pin from Logic 0 to Logic 1
ST2 pin from Logic 0 to Logic 1
1000
17.5
Max
9.5
3.3
20
+5
2
100
−5
4
ST1 pin or ST2 pin to common
40
50
Load = 10 MΩ
25°C, VRATIO = 6 V
2.8
2.9
10
25
25
°/sec
mV/°/sec
%
% of FS
V
°/sec
°/sec/g
°/sec/g2
°/sec/√Hz
°/sec/√Hz
°/hr
−50
50
±0.5
ST1 pin or ST2 pin
Unit
°/sec
°/sec
%
V
V
kΩ
Power on to ±0.5°/sec of final with CP5 = 100 nF
50
V
mV/°C
kΩ
kΩ
ms
For rated specifications
200
1000
µA
pF
6.25
V
mA
+105
°C
5.75
−55
1
6.00
4
3.0
Hz
kHz
Parameter is linearly ratiometric with VRATIO.
Measurement range is the maximum range possible, including output swing range, initial offset, sensitivity, offset drift, and sensitivity drift at 5 V supplies.
From +25°C to −40°C or +25°C to +105°C.
4
Adjusted by external capacitor, COUT. Reducing bandwidth below 0.01 Hz does not result in further noise improvement.
5
Self-test mismatch is described as (ST2 + ST1)/((ST2 − ST1)/2).
6
Based on characterization.
2
3
Rev. 0 | Page 3 of 12
ADXRS646-EP
Enhanced Product
ABSOLUTE MAXIMUM RATINGS
RATE SENSITIVE AXIS
Parameter
Acceleration (Any Axis, 0.5 ms)
Unpowered
Powered
VDD, AVCC
VRATIO
ST1, ST2
Output Short-Circuit Duration
(Any Pin to Common)
Operating Temperature Range
Storage Temperature Range
Rating
10,000 g
10,000 g
−0.3 V to +6.6 V
AVCC
AVCC
Indefinite
−65°C to +125°C
−65°C to +150°C
This is a Z-axis rate-sensing device (also called a yaw ratesensing 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
RATE OUT
AV CC = 5V
LONGITUDINAL
AXIS
4.75V
+
VRATIO /2
7
RATE IN
1
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.
A1
0.25V
ABCDE FG
LATERAL AXIS
GND
Figure 2. RATEOUT Signal Increases with Clockwise Rotation
ESD CAUTION
Drops onto hard surfaces can cause shocks of greater than
10,000 g and can exceed the absolute maximum rating of the
device. Care should be exercised in handling to avoid damage.
Rev. 0 | Page 4 of 12
10046-002
Table 2.
Enhanced Product
ADXRS646-EP
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
BOTTOM VIEW
VDD
PGND
CP5
CP3
CP4
7
6
ST1
CP1
5
ST2
CP2
4
AV CC
3
TEMP
2
1
G
F
VRATIO
DNC
SUMJ
E
D
C
RATEOUT
B
NOTES
1. DNC = DO NOT CONNECT TO THIS PIN.
A
10046-003
AGND
Figure 3. Pin Configuration
Table 3. Pin Function Descriptions
Pin No.
6D, 7D
6A, 7B
6C, 7C
5A, 5B
4A, 4B
3A, 3B
1B, 2A
1C, 2C
1D, 2D
1E, 2E
1F, 2G
3F, 3G
4F, 4G
5F, 5G
6G, 7F
6E, 7E
Mnemonic
CP5
CP4
CP3
CP1
CP2
AVCC
RATEOUT
SUMJ
DNC
VRATIO
AGND
TEMP
ST2
ST1
PGND
VDD
Description
HV Filter Capacitor, 100nF (±5%).
Charge Pump Capacitor, 22 nF (±5%).
Charge Pump Capacitor, 22 nF (±5%).
Charge Pump Capacitor, 22 nF (±5%).
Charge Pump Capacitor, 22 nF (±5%).
Positive Analog Supply.
Rate Signal Output.
Output Amp Summing Junction.
Do Not Connect to this Pin.
Reference Supply for Ratiometric Output.
Analog Supply Return.
Temperature Voltage Output.
Self-Test for Sensor 2.
Self-Test for Sensor 1.
Charge Pump Supply Return.
Positive Charge Pump Supply.
Rev. 0 | Page 5 of 12
ADXRS646-EP
Enhanced Product
TYPICAL PERFORMANCE CHARACTERISTICS
N > 1000 for all typical performance plots, unless otherwise noted.
35
30
25
PERCENT OF POPULATION (%)
20
15
10
25
20
15
10
5
RATEOUT (V)
0
8.5
10046-004
3.25
3.20
3.15
3.10
3.05
3.00
2.95
2.90
2.85
2.80
2.75
0
5
8.6
8.7
8.8
8.9
9.0
9.1
9.2
9.3
9.4
9.5
SENSITIVITY (mV/°/sec)
10046-010
PERCENT OF POPULATION (%)
30
Figure 7. Sensitivity at 25°C
Figure 4. Null Bias at 25°C
30
40
PERCENT OF POPULATION (%)
PERCENT OF POPULATION (%)
35
25
20
15
10
30
25
20
15
10
5
–10 –8 –6 –4 –2
0
2
4
6
8
10 12 14 16 18 20
PERCENT DRIFT (%)
Figure 5. Null Drift over Temperature (VRATIO = 5 V)
10046-011
DRIFT (°/sec/°C)
0
10046-005
0.30
0.25
0.20
0.15
0.10
0.05
0
–0.05
–0.10
–0.15
–0.20
–0.25
0
–0.30
5
Figure 8. Sensitivity Drift over Temperature
3.5
1k
3.3
NULL (V)
3.2
3.1
3.0
2.9
2.8
2.7
2.5
–60
–40
–20
0
20
40
60
TEMPERATURE (°C)
80
100
120
140
10046-100
2.6
Figure 6. Null Output over Temperature, 16 Parts in Sockets (VRATIO = 5 V)
Rev. 0 | Page 6 of 12
100
10
1
0.01
0.1
1
10
100
1k
AVERAGING TIME (Seconds)
Figure 9. Typical Root Allan Deviation at 25°C vs. Averaging Time
10046-012
ROOT ALLAN DEVIATION (°/Hour rms)
3.4
Enhanced Product
ADXRS646-EP
PERCENT OF POPULATION (%)
25
–0.35
0.70
–0.40
0.65
–0.45
0.60
–0.50
–0.55
0.45
–0.65
0.40
–0.70
0.35
40
60
80
100
120
140
0.30
–60
TEMPERATURE (°C)
–20
0
20
40
9
MAGNITUDE RESPONSE (dB)
40
30
20
10
–3
–2
–1
0
1
2
3
MISMATCH (%)
Figure 12. Self-Test Mismatch at 25°C (VRATIO = 5 V)
4
PHASE
650
10046-007
630
590
570
610
120
140
0
–10
3
–20
0
–30
MAGNITUDE
–3
–40
–6
–50
–9
–60
–12
–70
–15
–80
–18
0.1
10046-008
0
100
COUT = 470pF
6
60
50
80
Figure 14. ST2 Output Change vs. Temperature, 16 Parts in Sockets
70
–4
550
510
530
60
TEMPERATURE (°C)
Figure 11. ST1 Output Change vs. Temperature, 16 Parts in Sockets
PERCENT OF POPULATION (%)
–40
1
–90
10
FREQUENCY (kHz)
Figure 15. ADXRS646-EP Frequency Response with a 2.2 kHz Output Filter
Rev. 0 | Page 7 of 12
10046-101
20
PHASE RESPONSE (Degrees)
0
490
0.50
–0.60
–20
470
0.55
10046-103
ST2Δ (V)
0.75
10046-104
ST1Δ (V)
Figure 13. ST2 Output Change at 25°C (VRATIO = 5 V)
–0.30
–40
450
ST2Δ (mV)
Figure 10. ST1 Output Change at 25°C (VRATIO = 5 V)
–0.75
–60
430
0
410
–350
ST1Δ (mV)
5
10046-006
–370
–390
–410
–430
–450
–470
–490
–510
–530
–550
–570
–590
–610
0
–630
5
10
390
10
15
370
15
20
350
20
–650
PERCENT OF POPULATION (%)
25
Enhanced Product
35
70
30
60
50
40
30
20
20
15
10
10046-009
3.30
3.25
3.20
3.15
3.10
3.05
3.00
2.95
2.90
0
2.85
0
2.80
5
2.75
10
VTEMP OUTPUT (V)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0
50
100
TEMPERATURE (°C)
150
10046-102
0.5
–50
2.9
3.0
3.1
3.2
3.3
Figure 18. Current Consumption at 25°C (VRATIO = 5 V)
4.5
0
–100
2.8
CURRENT CONSUMPTION (mA)
Figure 16. VTEMP Output at 25°C (VRATIO = 5 V)
VTEMP (V)
25
Figure 17. VTEMP Output vs. Temperature
Rev. 0 | Page 8 of 12
3.4
10046-013
PERCENT OF POPULATION (%)
80
2.70
PERCENT OF POPULATION (%)
ADXRS646-EP
Enhanced Product
ADXRS646-EP
OUTLINE DIMENSIONS
A1 BALL
CORNER
7.05
6.85 SQ
6.70
*A1 CORNER
INDEX AREA
7
6
5
4
3
2
1
A
B
4.80
BSC SQ
0.80
BSC
C
D
E
F
G
TOP VIEW
BOTTOM VIEW
DETAIL A
3.80 MAX
0.60
0.55
0.50
SEATING
PLANE
3.20 MAX
2.50 MIN
COPLANARITY
0.15
BALL DIAMETER
*BALL A1 IDENTIFIER IS GOLD PLATED AND CONNECTED
TO THE D/A PAD INTERNALLY VIA HOLES.
10-26-2009-B
DETAIL A
0.60 MAX
0.25 MIN
Figure 19. 32-Lead Ceramic Ball Grid Array [CBGA]
(BG-32-3)
Dimensions shown in millimeters
ORDERING GUIDE
Model1
ADXRS646TBGZ-EP
ADXRS646TBGZ-EP-RL
1
Temperature Range
–55°C to +105°C
–55°C to +105°C
Package Description
32-Lead Ceramic Ball Grid Array [CBGA]
32-Lead Ceramic Ball Grid Array [CBGA]
Z = RoHS Compliant Part.
Rev. 0 | Page 9 of 12
Package Option
BG-32-3
BG-32-3
ADXRS646-EP
Enhanced Product
NOTES
Rev. 0 | Page 10 of 12
Enhanced Product
ADXRS646-EP
NOTES
Rev. 0 | Page 11 of 12
ADXRS646-EP
Enhanced Product
NOTES
©2012 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D10046-0-10/12(0)
Rev. 0 | Page 12 of 12