陀螺仪传感器的测试方案及特点

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

105°C operation

Self-test on digital command

Ultrasmall and light （《0.15 cc， 《0.5 gram） Temperature sensor output

RoHS compliant

Qualified for automotive applications

APPLICATIONS

Navigation systems

Inertial measurement units

Platform stabilization

Robotics

GENERAL DESCRIPTION

The ADXRS624 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 angular rate about the axis normal to the top surface of the package. The output is ratiometric with respect to a provided reference supply. A single external resistor between SUMJ and RATEOUT can be used to lower the scale factor. 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 conditioning circuits. The ADXRS624 is available in a 7 mm × 7 mm × 3 mm BGA chip scale package.

FUNCTIONAL BLOCK DIAGRAM

+5V

（ADC REF）

100nF

+5V ST2ST1 TEMPVRATIO

AVCC ADXRS624

100nF SELF-TEST 25kΩ25kΩ

AGND AT 25°C

DEMOD

DRIVEMECHANICALACVGA

SENSOR

AMP AMP

+5VVDD 200kΩ ±5%

CHARGE PUMP

100nF AND VOLTAGE

PGNDREGULATOR

CP1CP2CP3CP4CP5 SUMJRATEOUT

100nF -001

22nF22nF COUT 08999

Figure 1. ADXRS624 Block Diagram

Rev. A

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