PDF ADXRS401 Data sheet ( Hoja de datos )

Número de pieza	ADXRS401
Descripción	Single Chip Yaw Rate Gyro
Fabricantes	Analog Devices
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No Preview Available ! ±75°/s Single Chip Yaw Rate Gyro with Signal Conditioning ADXRS401 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 Ultra small and light (< 0.15 cc, < 0.5 gram) APPLICATIONS GPS navigation systems Image stabilization Inertial measurement units Platform stabilization GENERAL DESCRIPTION The ADXRS401 is a functionally complete and low cost angular rate sensor (gyroscope), integrated with all of the required electronics on one chip. It is manufactured using Analog Devices’ surface-micromachining technique, the same high volume BIMOS process used for high reliability automotive airbag accelerometers. It is available in a 7 mm × 7 mm × 3 mm BGA surface-mount package. 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 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 required for operation (see Figure 1). A precision reference and a temperature output are also provided for compensation techniques. Two digital self-test inputs electromechanically excite the sensor to test proper operation of both sensors and the signal conditioning circuits. ST1 5G ST2 4G FUNCTIONAL BLOCK DIAGRAM + 5V – 100nF 100nF COUT AVCC 3A 2G AGND 1F CMID 1D SUMJ 1C SELF TEST RATE SENSOR CORIOLIS SIGNAL CHANNEL π DEMOD RSEN1 SSEN2 ≈9kΩ ±35% ≈9kΩ ±35% RESONATOR LOOP ROUT 180kΩ 1% 1B RATEOUT 2A 2.5V REF 1E 2.5V CHARGE PUMP/REG. 12V PTAT 3G TEMP PDD 4A 5A 7E 6G CP2 CP1 22nF PGND ADXRS401 100nF 7F 6A 7B 7C 7D CP4 CP3 CP5 1µF 22nF Figure 1. Rev. 0 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 owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. 1 page PIN CONFIGURATION AND FUNCTION DESCRIPTIONS PGND PDD CP5 CP3 CP4 7 6 ST1 CP1 5 ST2 TEMP CP2 4 AVCC 3 2 AGND G 1 2.5V CMID SUMJ FEDC B RATEOUT A Figure 3. BGA-32 (Bottom View) Table 3. Pin Function Descriptions Pin No. Mnemonic 6D, 7D CP5 6A, 7B CP4 6C, 7C CP3 5A, 5B CP1 4A, 4B CP2 3A, 3B AVCC 1B, 2A RATEOUT 1C, 2C SUMJ 1D, 2D CMID 1E, 2E V2.5 1F, 2G AGND 3F, 3G TEMP 4F, 4G ST2 5F, 5G ST1 6G, 7F PGND 6E, 7E PDD Description HV Filter Capacitor to Ground – 1 µF 20 V minimum Charge Pump Capacitor – 22 nF Charge Pump Capacitor – 22 nF Charge Pump Capacitor – 22 nF Charge Pump Capacitor – 22 nF + Analog Supply Rate Signal Output Output Amp Summing Junction HF Filter Capacitor – 100 nF 2.5 V Precision Reference Analog Supply Return Temperature Voltage Output Self-Test for Sensor 2 Self-Test for Sensor 1 Charge Pump Supply Return + Charge Pump Supply ADXRS401 Rev. 0 \| Page 5 of 12 5 Page 2.60 2.58 2.56 2.54 2.52 2.50 0 2 4 6 8 10 TIME (Seconds) Figure 17. Random Vibration (Lateral) 2 Hz to 40 Hz 3.2 g rms 2.60 2.58 2.56 2.54 2.52 2.50 0 2 4 6 8 10 TIME (Seconds) Figure 18. Random Vibration (Lateral) 10 kHz to 20 kHz at 0.01 g/√Hz with 60 Hz Sampling and 0.5 Sec Averaging ADXRS401 2.60 2.58 2.56 STATIC 0.8mV rms 2.54 SHAKING 2.5mV rms 2.52 2.50 0 2468 TIME (Seconds) 10 Figure 19. Random Vibration (Lateral) 10 kHz to 20 kHz at 0.01 g/√Hz with 60 Hz Sampling and 0.5 Sec Averaging 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 10 TIME (Seconds) Figure 20. Root Allen Variance vs. Averaging Time 100 Rev. 0 \| Page 11 of 12 11 Page

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