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AS5140H

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 ....................................................................................................................................................................... 4

4.1 Pin Descriptions

................................................................................................................................................................................... 4

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

6 Electrical Characteristics

.......................................................................................................................................................... 7

6.1 DC Characteristics for Digital Inputs and Outputs ................................................................................................................................7

6.2 Magnetic Input Specification

................................................................................................................................................................ 8

6.3 Electrical System Specifications

.......................................................................................................................................................... 8

6.4 Programming Conditions ...................................................................................................................................................................... 9

6.5 Timing Characteristics ........................................................................................................................................................................ 10

7 Detailed Description

............................................................................................................................................................... 12

7.1 10-bit Absolute Angular Position Output

............................................................................................................................................ 12

7.1.1 Synchronous Serial Interface (SSI) ........................................................................................................................................... 12

7.1.2 Daisy Chain Mode ..................................................................................................................................................................... 14

7.2 Incremental Outputs ........................................................................................................................................................................... 15

7.2.1 Quadrature A/B Output (Quad A/B Mode) ................................................................................................................................. 15

7.2.2 LSB Output (Step/Direction Mode) ............................................................................................................................................ 15

7.2.3 Incremental Output Hysteresis .................................................................................................................................................. 16

7.3 Pulse Width Modulation (PWM) Output

............................................................................................................................................. 16

7.4 Analog Output

.................................................................................................................................................................................... 17

7.5 Brushless DC Motor Commutation Mode ........................................................................................................................................... 18

7.6 Programming the AS5140H

............................................................................................................................................................... 19

7.6.1 OTP Memory Assignment .......................................................................................................................................................... 19

7.6.2 User Selectable Settings ........................................................................................................................................................... 20

7.6.3 OTP Default Setting ................................................................................................................................................................... 20

7.6.4 Redundant Programming Option ............................................................................................................................................... 20

7.6.5 OTP Register Entry and Exit Condition ..................................................................................................................................... 20

7.6.6 Incremental Mode Programming ............................................................................................................................................... 21

7.6.7 Zero Position Programming ....................................................................................................................................................... 22

7.7 Alignment Mode

................................................................................................................................................................................. 22

7.8 3.3V / 5V Operation ............................................................................................................................................................................ 23

7.9 Choosing the Proper Magnet

............................................................................................................................................................. 24

7.9.1 Physical Placement of the Magnet ............................................................................................................................................ 24

7.10 Simulation Modeling ......................................................................................................................................................................... 26

7.11 Failure Diagnostics ........................................................................................................................................................................... 27

7.11.1 Magnetic Field Strength Diagnosis .......................................................................................................................................... 27

7.11.2 Power Supply Failure Detection .............................................................................................................................................. 27

7.12 Angular Output Tolerances ............................................................................................................................................................... 27

7.12.1 Accuracy .................................................................................................................................................................................. 27

7.12.2 Transition Noise ....................................................................................................................................................................... 29

7.12.3 High Speed Operation ............................................................................................................................................................. 29

7.12.4 Propagation Delays ................................................................................................................................................................. 30

7.12.5 Internal Timing Tolerance ........................................................................................................................................................ 30