ADXRS300 Analog Devices, Inc., ADXRS300 Datasheet

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ADXRS300

Manufacturer Part Number
ADXRS300
Description
?300?/s Single Chip Yaw Rate Gyro With Signal Conditioning
Manufacturer
Analog Devices, Inc.
Datasheet

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FEATURES
Complete rate gyroscope on a single chip
Z-axis (yaw rate) response
High vibration rejection over wide frequency
2000 g powered shock survivability
Self-test on digital command
Temperature sensor output
Precision voltage reference output
Absolute rate output for precision applications
5 V single-supply operation
Ultrasmall and light (< 0.15 cc, < 0.5 gram)
APPLICATIONS
Vehicle chassis rollover sensing
Inertial measurement units
Platform stabilization
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no 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.
ADXRS300
ST2
ST1
5G
4G
SELF
TEST
AVCC
CP2
3A
4A
FUNCTIONAL BLOCK DIAGRAM
22nF
+
SENSOR
5A
RATE
100nF
5V
CP1
PDD
CHARGE PUMP/REG.
7E
100nF
2G
RESONATOR LOOP
AGND
6G
CORIOLIS SIGNAL CHANNEL
Figure 1.
PGND
1F
7F
π DEMOD
100nF
GENERAL DESCRIPTION
The ADXRS300 is a complete angular rate sensor (gyroscope)
that uses Analog Devices’ surface-micromachining process to
make a functionally complete and low cost angular rate sensor
integrated with all of the 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 angular rate about the axis normal to the top surface of the
package (see Figure 4). A single external resistor can be used to
lower the scale factor. An external capacitor is used to set the
bandwidth. Other external capacitors are required for operation
(see Figure 5).
A precision reference and a temperature output are also
provided for compensation techniques. Two digital self-test
inputs electromechanically excite the sensor to test proper
operation of both sensors and the signal conditioning circuits.
The ADXRS300 is available in a 7 mm × 7 mm × 3 mm BGA
chip-scale package.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
6A
±300°/s Single Chip Yaw Rate
12V
Gyro with Signal Conditioning
CP4
≈ 7k Ω ± 35% ≈ 7k Ω ± 35%
7B
R
CMID
SEN1
22nF
CP3
2.5V REF
7C
1D
R
CP5
SEN2
PTAT
7D
1C
47nF
© 2004 Analog Devices, Inc. All rights reserved.
SUMJ
180k Ω 1%
R
OUT
C
OUT
1B
2A
1E
3G
RATEOUT
TEMP
2.5V
ADXRS300
www.analog.com

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ADXRS300 Summary of contents

Page 1

... A precision reference and a temperature output are also provided for compensation techniques. Two digital self-test inputs electromechanically excite the sensor to test proper operation of both sensors and the signal conditioning circuits. The ADXRS300 is available × × BGA chip-scale package. FUNCTIONAL BLOCK DIAGRAM – ...

Page 2

... Updated Format..................................................................Universal Changes to Table 1 Conditions ....................................................... 3 Added Evaluation Board to Ordering Guide ................................ 8 3/03—Data Sheet Changed from Rev Rev. A Edit to Figure 3.................................................................................. 5 Increasing Measurement Range ..................................................7 Using the ADXRS300 with a Supply-Ratiometric ADC ..........7 Null Adjust .....................................................................................7 Self-Test Function .........................................................................7 Continuous Self-Test.....................................................................7 Outline Dimensions ..........................................................................8 Ordering Guide .............................................................................8 Rev Page ...

Page 3

... Typ Max ±300 4.6 5 5.4 4.6 5 5.4 0.1 2.3 2.50 2.7 2.3 2.7 35 0 –150 –270 –450 +150 +270 +450 3.3 1.7 50 2.50 50 8.4 0.25 V – 0.25 S 1000 2.45 2.5 2.55 200 5.0 1.0 5.0 4.75 5.00 5.25 6.0 8.0 –40 +85 . ADXRS300 1 Unit °/s mV/°/s mV/°/ °/s/g °/s/V °/s/√Hz Hz kHz kΩ V µA mV/° µA mV/mA mV °C ...

Page 4

... ADXRS300 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Acceleration (Any Axis, Unpowered, 0.5 ms) Acceleration (Any Axis, Powered, 0.5 ms Output Short-Circuit Duration (Any Pin to Common) Operating Temperature Range Storage Temperature Stresses above those listed under the Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only ...

Page 5

... Rate Signal Output Output Amp Summing Junction HF Filter Capacitor—100 nF 2.5 V Precision Reference Analog Supply Return Temperature Voltage Output Self-Test for Sensor 2 Self-Test for Sensor 1 Charge Pump Supply Return + Charge Pump Supply Rev Page ADXRS300 CP4 7 6 CP1 5 CP2 4 3 AVCC 2 ...

Page 6

... ADXRS300 THEORY OF OPERATION The ADXRS300 operates on the principle of a resonator gyro. Two polysilicon sensing structures each contain a dither frame, which is electrostatically driven to resonance. This produces the necessary velocity element to produce a Coriolis force during angular rate. At two of the outer extremes of each frame, ...

Page 7

... Rather they are nominally constant for dc supply changes within the 4. 5.25 V operating range. If the ADXRS300 is used with a supply-ratiometric ADC, the ADXRS300’s 2.5 V output can be converted and used to make corrections in software for the supply variations. NULL ADJUST Null adjustment is possible by injecting a suitable current to SUMJ (1C, 2C) ...

Page 8

... MAX ORDERING GUIDE Model Temperature Range ADXRS300ABG –40°C to +85°C ADXRS300ABG-Reel –40°C to +85°C ADXRS300EB © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 7.00 BSC BALL A1 INDICATOR TOP VIEW DETAIL A 0 ...

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