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AS5245HQFT Datasheet(PDF) 3 Page - ams AG |
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AS5245HQFT Datasheet(HTML) 3 Page - ams AG |
3 / 32 page www.austriamicrosystems.com/AS5245 Revision 1.5 2 - 31 AS5245 Data Sheet - C o n t e n t s Contents 1 General Description .................................................................................................................................................................. 1 2 Key Features............................................................................................................................................................................. 1 3 Applications............................................................................................................................................................................... 1 4 Pin Assignments ....................................................................................................................................................................... 3 4.1 Pin Descriptions.................................................................................................................................................................................... 4 5 Absolute Maximum Ratings ...................................................................................................................................................... 5 6 Electrical Characteristics........................................................................................................................................................... 6 6.1 System Specifications .......................................................................................................................................................................... 7 7 Timing Characteristics .............................................................................................................................................................. 9 8 Detailed Description................................................................................................................................................................ 10 8.1 Mode_Index Pin.................................................................................................................................................................................. 10 8.2 Synchronous Serial Interface (SSI) .................................................................................................................................................... 11 8.2.1 Serial Data Contents.................................................................................................................................................................. 11 8.2.2 Z-axis Range Indication (Push Button Feature, Red/Yellow/Green Indicator)........................................................................... 12 8.2.3 Incremental Mode ...................................................................................................................................................................... 12 8.2.4 Sync Mode................................................................................................................................................................................. 14 8.2.5 Sine/Cosine Mode ..................................................................................................................................................................... 14 8.2.6 Daisy Chain Mode ..................................................................................................................................................................... 14 8.3 Pulse Width Modulation (PWM) Output.............................................................................................................................................. 15 8.3.1 Changing the PWM Frequency.................................................................................................................................................. 16 8.4 Analog Output..................................................................................................................................................................................... 16 9 Application Information ........................................................................................................................................................... 17 9.1 Programming the AS5245 .................................................................................................................................................................. 17 9.1.1 Zero Position Programming ....................................................................................................................................................... 17 9.1.2 OTP Memory Assignment.......................................................................................................................................................... 18 9.1.3 User Selectable Settings ........................................................................................................................................................... 18 9.1.4 OTP Default Setting................................................................................................................................................................... 19 9.1.5 Redundancy............................................................................................................................................................................... 19 9.1.6 Redundant Programming Option ............................................................................................................................................... 19 9.2 Alignment Mode.................................................................................................................................................................................. 20 9.3 3.3V / 5V Operation............................................................................................................................................................................ 21 9.4 Choosing the Proper Magnet.............................................................................................................................................................. 22 9.5 Failure Diagnostics............................................................................................................................................................................. 23 9.5.1 Magnetic Field Strength Diagnosis............................................................................................................................................ 23 9.5.2 Power Supply Failure Detection ................................................................................................................................................ 23 9.6 Angular Output Tolerances................................................................................................................................................................. 23 9.6.1 Accuracy.................................................................................................................................................................................... 23 9.6.2 Transition Noise......................................................................................................................................................................... 25 9.6.3 High Speed Operation ............................................................................................................................................................... 25 9.6.4 Propagation Delays ................................................................................................................................................................... 26 9.6.5 Internal Timing Tolerance .......................................................................................................................................................... 26 9.6.6 Temperature .............................................................................................................................................................................. 26 9.6.7 Accuracy over Temperature ...................................................................................................................................................... 26 9.7 AS5245 Differences to AS5045.......................................................................................................................................................... 27 10 Package Drawings and Markings ......................................................................................................................................... 28 11 Ordering Information ............................................................................................................................................................. 30 |
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