ADXRS300ABG Analog Devices, ADXRS300ABG Datasheet

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ADXRS300ABG

Manufacturer Part Number
ADXRS300ABG
Description
Manufacturer
Analog Devices
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 operation
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. A
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 companies.
ADXRS300
ST2
ST1
5G
4G
SELF
TEST
AVCC
CP2
3A
4A
FUNCTIONAL BLOCK DIAGRAM
22nF
5A
+
SENSOR
RATE
100nF
5V
CP1
PDD
CHARGE PUMP/REG.
7E
100nF
2G
RESONATOR LOOP
6G
AGND
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 vol-
ume 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 3). 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 4).
A precision reference and a temperature output are also pro-
vided 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
Gyro with Signal Conditioning
12V
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
© 2003 Analog Devices, Inc. All rights reserved.
SUMJ
180k Ω 1%
R
OUT
C
OUT
1B
2A
1E
3G
RATEOUT
2.5V
TEMP
ADXRS300
www.analog.com

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ADXRS300ABG Summary of contents

Page 1

... Rev. A 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 ...

Page 2

ADXRS300 TABLE OF CONTENTS ADXRS300—Specifications ............................................................ 3 Absolute Maximum Ratings............................................................ 4 Rate Sensitive Axis........................................................................ 4 Theory of Operation ........................................................................ 5 Supply and Common Considerations ....................................... 5 Setting Bandwidth ........................................................................ 5 Increasing Measurement Range ................................................. 6 REVISION HISTORY Revision A 3/03—Data ...

Page 3

... OUT Source 0 < I < 200 µA OUT 4. 5. Delta from 25°C Temperature Tested to Max and Min Specs MIN MAX Self-Test Function section for details. Rev Page ADXRS300 = 0.01 µF), unless otherwise noted. OUT ADXRS300ABG Min 1 Typ Max 1 ±300 4.6 5 5.4 4.6 5 5.4 0.1 2.3 2.50 2.7 2.3 2 ...

Page 4

ADXRS300 ABSOLUTE MAXIMUM RATINGS Table 2. ADXRS300 Absolute Maximum Ratings 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 ...

Page 5

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 ...

Page 6

... As an additional failure detection measure, power-on self-test can be performed. How- ever, some applications may warrant continuous self-test while sensing rate. Application notes outlining continuous self-test techniques are also available on the Analog Devices website. Rev Page × ...

Page 7

PIN CONFIGURATIONS AND FUNCTIONAL 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 PGND ...

Page 8

... Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Ordering Guide ADXRS300 Products Temperature Package ADXRS300ABG –40°C to +85°C ADXRS300ABG-Reel –40°C to +85°C © 2003 Analog Devices, Inc. All rights reserved. Trademarks and regis- tered trademarks are the property of their respective companies. 7.00 BSC ...

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