ad22304 Analog Devices, Inc., ad22304 Datasheet

ad22304

Manufacturer Part Number

ad22304

Description

?80?/s Single Chip Yaw Rate Gyro With Signal Conditioning

Manufacturer

Analog Devices, Inc.

Datasheet

1.AD22304.pdf (12 pages)

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FEATURES

Complete rate gyroscope on a single chip

Z-axis (yaw rate) response

High vibration rejection over wide frequency

0.05°/s/¥Hz noise

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

GPS navigation systems

Vehicle stability control

Inertial measurement units

Guidance and control

Platform stabilization

Rev. 0-Preliminary

Information furnished by Analog Devices is believed to be accurate and reli-

able. 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 Ana-

log Devices. Trademarks and registered trademarks are the property of their

respective owners.

ADXRS150

AD22304

ST2

ST1

SELF

TEST

AVCC

CP2

FUNCTIONAL BLOCK DIAGRAM

Gyro with Signal Condition

22nF

SENSOR

RATE

100nF

CP1

±80°/s Single Chip Yaw Rate

PDD

–

CHARGE PUMP/REG.

100nF

RESONATOR LOOP

AGND

Figure 1.

CORIOLIS SIGNAL CHANNEL

PGND

S DEMOD

100nF

GENERAL DESCRIPTION

The AD22304 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 propor-

tional to the angular rate about the axis normal to the top sur-

face of the package (see Figure 2). 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 re-

quired for operation (see Figure 22).

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 the operation of

both sensors and the signal conditioning circuits. The AD22304

is available in a 7 mm × 7 mm × 3 mm BGA surface-mount

package.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106,

U.S.A.

Tel: 781.329.4700

12V

CP4

| 9k : r 35% | 9k : r 35%

CMID

SEN1

22nF

CP3

2.5V REF

CP5

SEN2

PTAT

47nF

SUMJ

180k : 1%

OUT

RATEOUT

2.5V

TEMP

AD22304

www.analog.com

ing

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