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AD2S1210

Variable Resolution, 10-Bit to 16-Bit R/D Converter with Reference Oscillator

Analog Devices 

AD2S1210

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

REVISION HISTORY

8/08—Revision 0: Initial Version

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

Rev. 0 | Page 2 of 36

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