±150°/Sec Yaw Rate Gyroscope

ADXRS623

Rev. 0

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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

Ratiometric to referenced supply

5 V single-supply operation

–40°C to +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

GENERAL DESCRIPTION

The ADXRS623 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 pro-

vided reference supply. 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 con-

ditioning circuits. The ADXRS623 is available in a 7 mm × 7 mm

× 3 mm ceramic ball grid array (CBGA) package.

FUNCTIONAL BLOCK DIAGRAM

AGND

PGND

ST2

ST1

TEMP

CP1

CP2

CP3

CP4

CP5

SUMJ

RATEOUT

DEMOD

180k

Ω ± 1%

22nF

100nF

22nF

100nF

100nF

100nF

DRIVE

AMP

MECHANICAL

SENSOR

CHARGE PUMP

AND VOLTAGE

REGULATOR

+5V

+5V

+5V

(ADC REF)

AC

AMP

VGA

25k

Ω

@ 25°C

ADXRS623

25k

Ω

SELF-TEST

Figure 1.