ADXRS300 ±300°/s Single Chip Yaw Rate Gyro with …

1 300 /s Single chip Yaw Rate gyro with signal conditioning ADXRS300 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 (< cc, < gram) APPLICATIONS Vehicle chassis rollover sensing Inertial measurement units Platform stabilization 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 .

2 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.

3 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. FUNCTIONAL BLOCK DIAGRAM 5G4G3A5V2G1F7F6A7D7C7B1C4A5A7E6G1D2A1E3G 1 BPDD12V+ADXRS30047nF22nF100nF22nFCP2CP1 PGNDCP4CP3CP5 CHARGE DEMODRATESENSORSELFTEST100nF100nFCMIDAGN DAVCCST1ST2 CORIOLIS signal REF 7k 35% 7k 35%180k 1%RESONATOR LOOP Figure 1. Rev. B Information furnished by Analog Devices is believed to be accurate and reliable.

4 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. One Technology Way, Box 9106, Norwood, MA 02062-9106, Tel: Fax: 2004 Analog Devices, Inc.

5 All rights reserved. ADXRS300 Rev. B | Page 2 of 8 TABLE OF CONTENTS 3 Absolute Maximum 4 Rate Sensitive 4 ESD 4 Pin Configuration and Function 5 Theory of Operation .. 6 Supply and Common Considerations .. 6 Setting Bandwidth .. 7 Increasing Measurement Range ..7 Using the ADXRS300 with a Supply-Ratiometric ADC ..7 Null Adjust ..7 Self-Test Function ..7 Continuous Outline Dimensions ..8 Ordering Guide ..8 REVISION HISTORY 3/04 Data Sheet Changed from Rev. A to Rev. B Updated Format ..Universal Changes to Table 1 Conditions.

6 3 Added Evaluation Board to Ordering Guide .. 8 3/03 Data Sheet Changed from Rev. 0 to Rev. A Edit to Figure 5 ADXRS300 Rev. B | Page 3 of 8 SPECIFICATIONS @TA = 25 C, VS = 5 V, Angular Rate = 0 /s, Bandwidth = 80 Hz (COUT = F), 1g, unless otherwise noted. Table 1. ADXRS300 ABG Parameter Conditions Min1 Typ Max1 Unit SENSITIVITY Clockwise rotation is positive output Dynamic Range2 Full-scale range over specifications range 300 /s Initial @25 C

7 5 mV/ /s Over Temperature3 VS = V to V 5 mV/ /s Nonlinearity Best fit straight line % of FS NULL Initial Null V Over Temperature3 VS = V to V V Turn-On Time Power on to /s of final 35 ms Linear Acceleration Effect Any axis /s/g Voltage Sensitivity VCC = V to V 1 /s/V NOISE PERFORMANCE Rate Noise Density @25 C /s/ Hz FREQUENCY RESPONSE

8 3 dB Bandwidth (User Selectable)4 22 nF as comp cap (see the Setting Bandwidth section) 40 Hz Sensor Resonant Frequency 14 kHz SELF-TEST INPUTS ST1 RATEOUT Response5 ST1 pin from Logic 0 to 1 150 270 450 mV ST2 RATEOUT Response5 ST2 pin from Logic 0 to 1 +150 +270 +450 mV Logic 1 Input Voltage Standard high logic level definition V Logic 0 Input Voltage Standard low logic level definition V Input Impedance To common 50 k TEMPERATURE

9 SENSOR VOUT at 298 K V Max Current Load on Pin Source to common 50 A Scale Factor Proportional to absolute temperature mV/ K OUTPUT DRIVE CAPABILITY Output Voltage Swing IOUT = 100 A VS V Capacitive Load Drive 1000 pF V REFERENCE Voltage Value V Load Drive to Ground Source 200 A Load Regulation 0 < IOUT < 200 A mV/mA Power Supply Rejection VS to VS mV/V

10 Temperature Drift Delta from 25 C mV POWER SUPPLY Operating Voltage Range V Quiescent Supply Current mA TEMPERATURE RANGE Specified Performance Grade A Temperature tested to max and min specifications 40 +85 C 1 All minimum and maximum specifications are guaranteed.