AS5261

Datasheet - Contents

www.ams.com

Revision 1.1

3 - 32

Contents

1 General Description .................................................................................................................................................................. 1

2 Key Features............................................................................................................................................................................. 1

3 Benefits..................................................................................................................................................................................... 1

4 Applications............................................................................................................................................................................... 1

5 Pin Assignments ....................................................................................................................................................................... 4

5.1 Pin Descriptions.................................................................................................................................................................................... 4

6 Absolute Maximum Ratings ......................................................................................................................................................

5

7 Electrical Characteristics...........................................................................................................................................................

6

7.1 Operating Conditions............................................................................................................................................................................ 6

7.2 Magnetic Input Specification................................................................................................................................................................. 6

7.3 Electrical System Specifications........................................................................................................................................................... 7

7.4 Timing Characteristics .......................................................................................................................................................................... 7

8 Detailed Description.................................................................................................................................................................. 8

8.1 Operation.............................................................................................................................................................................................. 8

8.1.1 VDD Voltage Monitor ................................................................................................................................................................... 8

8.2 PWM Output......................................................................................................................................................................................... 8

8.2.1 Programming Parameters............................................................................................................................................................ 9

8.2.2 Application Specific Angular Range Programming ...................................................................................................................... 9

8.2.3 Application Specific Programming of the Break Point ............................................................................................................... 10

8.2.4 Multiple Slope Output ................................................................................................................................................................ 10

8.2.5 Linearization of the Output......................................................................................................................................................... 12

8.2.6 Resolution of Parameters .......................................................................................................................................................... 12

8.2.7 Noise Suppressor ...................................................................................................................................................................... 14

8.2.8 Hysteresis Function ................................................................................................................................................................... 14

8.3 PWM Output Driver Parameters......................................................................................................................................................... 14

9 Application Information ...........................................................................................................................................................

15

9.1 Recommended Application Schematic............................................................................................................................................... 15

9.2 Programming the AS5261 .................................................................................................................................................................. 15

9.2.1 UART Interface for Programming .............................................................................................................................................. 16

9.2.2 Frame Organization ................................................................................................................................................................... 16

9.2.3 READ......................................................................................................................................................................................... 17

9.2.4 WRITE ....................................................................................................................................................................................... 17

9.2.5 Baud Rate Setup ....................................................................................................................................................................... 18

9.3 OTP Programming Data..................................................................................................................................................................... 19

9.4 READ / WRITE Register Map............................................................................................................................................................. 23

9.5 READ Only Register Map................................................................................................................................................................... 24

9.6 Special Registers................................................................................................................................................................................ 26

9.7 Programming Procedure .................................................................................................................................................................... 27

10 Package Drawings and Markings .........................................................................................................................................

28

11 Ordering Information .............................................................................................................................................................

31