AS5140H-ASST【PDF 3/38 页】IC ENCODER ROTARY 10BIT 16-SSOP

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Sheet目录60

1页 2页 [3页]4页 5页 6页 7页

www.austriamicrosystems.com/AS5140H

Revision 1.4

2 - 37

AS5140H

Data Sheet - Contents

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

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