AD2S1210

Rev. 0 | Page 2 of 36

TABLE OF CONTENTS

Features .............................................................................................. 1

 

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

 

Functional Block Diagram .............................................................. 1

 

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

 

Product Highlights ........................................................................... 1

 

Revision History ............................................................................... 2

 

Specifications..................................................................................... 3

 

Timing Specifications .................................................................. 6

 

Absolute Maximum Ratings............................................................ 8

 

ESD Caution.................................................................................. 8

 

Pin Configuration and Function Descriptions............................. 9

 

Typical Performance Characteristics ........................................... 11

 

Resolver Format Signals................................................................. 15

 

Theory of Operation ...................................................................... 16

 

Resolver to Digital Conversion................................................. 16

 

Fault Detection Circuit .............................................................. 16

 

On-Board Programmable Sinusoidal Oscillator .................... 18

 

Synthetic Reference Generation ............................................... 18

 

Configuration of AD2S1210 ......................................................... 20

 

Modes of Operation ................................................................... 20

 

Register Map.................................................................................... 21

 

Position Register ......................................................................... 21

 

Velocity Register ......................................................................... 21

 

LOS Threshold Register ............................................................ 21

 

DOS Overrange Threshold Register........................................ 21

 

DOS Mismatch Threshold Register......................................... 21

 

DOS Reset Maximum and Minimum Threshold Registers . 22

 

LOT High Threshold Register .................................................. 22

 

LOT Low Threshold Register ................................................... 22

 

Excitation Frequency Register .................................................. 22

 

Control Register ......................................................................... 22

 

Software Reset Register ............................................................. 23

 

Fault Register .............................................................................. 23

 

Digital interface .............................................................................. 24

 

SOE Input .................................................................................... 24

 

SAMPLE Input............................................................................ 24

 

Data Format ................................................................................ 24

 

Parallel Interface......................................................................... 24

 

Serial Interface ............................................................................ 28

 

Incremental Encoder Outputs .................................................. 31

 

Supply Sequencing and Reset ................................................... 31

 

Circuit Dynamics ........................................................................... 32

 

Loop Response Model ............................................................... 32

 

Sources of Error.......................................................................... 33

 

Outline Dimensions ....................................................................... 34

 

Ordering Guide .......................................................................... 34

 

REVISION HISTORY

8/08—Revision 0: Initial Version