ADXRS401 Analog Devices, Inc., ADXRS401 Datasheet
ADXRS401
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ADXRS401 Summary of contents
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... Single Chip Yaw Rate Gyro with Signal Conditioning 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 manufactured using Analog Devices’ surface-micromachining technique, the same high volume BIMOS process used for high reliability automotive airbag accelerometers available × ...
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... ADXRS401 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 Rate-Sensitive Axis ....................................................................... 4 Pin Configuration and Function Descriptions............................. 5 Typical Performance Characteristics ............................................. 6 Theory of Operation ........................................................................ 8 Supply and Common Considerations ....................................... 8 Setting Bandwidth ........................................................................ 9 Increasing Measurement Range ................................................. 9 Temperature Output and Calibration........................................ 9 Use with a Supply-Ratiometric ADC....................................... 10 Null Adjust................................................................................... 10 Self-Test Function....................................................................... 10 Acceleration Sensitivity ............................................................. 10 Outline Dimensions ...
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... Standard high logic level definition Standard low logic level definition To common Source to common Proportional to absolute temperature I = ±100 µA OUT Source 0 < I < 200 µA OUT Self-Test Function section for details. Rev Page ADXRS401 Min Typ Max Unit ±75 °/s 12.75 15 17.25 mV/°/s 0 2.50 V ...
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... ADXRS401 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Acceleration (Any Axis, Unpowered, 0.5 ms) Acceleration (Any Axis, Powered, 0.5 ms Output Short-Circuit Duration (Any Pin to Common) Operating Temperature Range Storage Temperature ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges ...
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... 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 Rev Page ADXRS401 CP4 7 6 CP1 5 4 CP2 3 AVCC 2 ...
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... ADXRS401 TYPICAL PERFORMANCE CHARACTERISTICS @ Hz, Typical Vibration Characteristics Flat Band kHz 1.5 1.7 1.9 2.1 2.3 2.5 2.7 OUTPUT IN VOLTS Figure 4. Initial Null Output –10 –8 –6 –4 – NULL SHIFT IN mV/°C Figure 5. Null Tempco ...
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... Figure 11 Random Vibration in Package-Lateral Axis Orientation PACKAGE LONGITUDINAL AXIS (0.5s AVERAGE) 2.50 2.49 10g 2.48 0g 2.47 2.46 2. Figure 12 Random Vibration in Package-Longitudinal Axis Orientation 2.50 2.49 10g 2.48 0g 2.47 2.46 2. Figure 13 Random Vibration in Rate Axis Orientation Rev Page ADXRS401 5 10 TIME (Seconds) RATE AXIS (0.5s AVERAGE TIME (Seconds) ...
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... THEORY OF OPERATION 5V Note that inner rows/columns of pins have been omitted for clarity but should be connected in the application. The ADXRS401 operates on the principle of a resonator gyro. Two polysilicon sensing structures each contain a dither frame, which is electrostatically driven to resonance. This produces the necessary velocity element to produce a Coriolis force during angular rate ...
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... SETTING BANDWIDTH External capacitors CMID and C are used in combination OUT with on-chip resistors to create two low-pass filters to limit the bandwidth of the ADXRS401’s rate response. The –3 dB frequency set by R and C is: OUT OUT ( ) = × × × π OUT ...
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... Rather, they are nominally constant for dc supply changes within the 4. 5.25 V operating range. If the ADXRS401 is used with a supply-ratiometric ADC, the ADXRS401’s 2.5 V output can be converted and used to make corrections in software for the supply variations. NULL ADJUST Null adjustment is possible by injecting a suitable current to SUMJ (1C, 2C) ...
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... Figure 19. Random Vibration (Lateral) 10 kHz to 20 kHz at 0.01 g/ 0.07 0.06 0.05 0.04 0.03 0.02 0. Figure 20. Root Allen Variance vs. Averaging Time Rev Page ADXRS401 STATIC 0.8mV rms SHAKING 2.5mV rms TIME (Seconds) √ Hz with 60 Hz Sampling and 0.5 Sec Averaging 10 TIME (Seconds) 10 100 ...
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... MAX ORDERING GUIDE Model Temperature Range ADXRS401ABG −40°C to +85°C ADXRS401ABG-REEL −40°C to +85°C ADXRS401EB © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C04992–0–7/04(0) 7.00 BSC BALL A1 ...