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