Datasheet

AD2S1210
Rev. A | 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
2/10—Rev. 0 to Rev. A
Changes to Typical Performance Characteristics Section ... 11, 12
Changes to Ordering Guide .......................................................... 34
8/08—Revision 0: Initial Version