AS5045

Data Sheet

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Revision 1.7

2 – 33

Table of Contents

1

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

2

Benefits................................................................................................................................................... 1

3

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

4

Applications ............................................................................................................................................ 1

5

Pinout ..................................................................................................................................................... 4

5.1

Pin Configuration .................................................................................................................................... 4

5.2

Pin Description........................................................................................................................................ 4

6

Electrical Characteristics......................................................................................................................... 5

6.1

AS5045 Differences to AS5040 ............................................................................................................... 5

6.2

Absolute Maximum Ratings (non operating) ............................................................................................ 6

6.3

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

6.4

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

6.4.1

CMOS Schmitt-Trigger Inputs: CLK, CSn. (CSn = internal Pull-up).......................................................... 7

6.4.2

CMOS / Program Input: Prog................................................................................................................... 7

6.4.3

CMOS Output Open Drain: MagINCn, MagDECn .................................................................................... 7

6.4.4

CMOS Output: PWM ............................................................................................................................... 7

6.4.5

Tristate CMOS Output: DO...................................................................................................................... 8

6.5

Magnetic Input Specification ................................................................................................................... 8

6.6

Electrical System Specifications.............................................................................................................. 9

6.7

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

6.7.1

Synchronous Serial Interface (SSI).........................................................................................................10

6.7.2

Pulse Width Modulation Output ..............................................................................................................11

6.8

Programming Conditions ........................................................................................................................11

7

Functional Description............................................................................................................................12

8

Mode Input Pin.......................................................................................................................................13

8.1

Synchronous Serial Interface (SSI) ........................................................................................................13

8.1.1

Data Content ..........................................................................................................................................14

8.1.2

Z-axis Range Indication (Push Button Feature, Red/Yellow/Green Indicator)..........................................14

8.2

Daisy Chain Mode..................................................................................................................................15

9

Pulse Width Modulation (PWM) Output ..................................................................................................16

9.1

Changing the PWM Frequency...............................................................................................................17

10

Analog Output ........................................................................................................................................17

11

Programming the AS5045 ......................................................................................................................18

11.1 Zero Position Programming....................................................................................................................18

11.2 Repeated OTP Programming .................................................................................................................18

11.3 Non-permanent Programming ................................................................................................................19

11.4 Analog Readback Mode .........................................................................................................................20

12

Alignment Mode .....................................................................................................................................21

13

3.3V / 5V Operation ...............................................................................................................................22

14

Choosing the Proper Magnet..................................................................................................................23

14.1 Physical Placement of the Magnet .........................................................................................................24