AD9835

Data Sheet

Rev. A | Page 2 of 28

TABLE OF CONTENTS

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

 

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

 

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

 

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

 

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

 

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

 

Timing Characteristics ................................................................ 5

 

Absolute Maximum Ratings............................................................ 6

 

ESD Caution.................................................................................. 6

 

Pin Configuration and Function Descriptions............................. 7

 

Typical Performance Characteristics ............................................. 9

 

Terminology .................................................................................... 12

 

Theory Of Operation ..................................................................... 13

 

Circuit Description......................................................................... 14

 

Numerical Controlled Oscillator and Phase Modulator ....... 14

 

COS LookUp Table (LUT) ........................................................ 14

 

Digital-to-Analog Converter .................................................... 14

 

Functional Description .................................................................. 15

 

Serial Interface ............................................................................ 15

 

Direct Data Transfer and Deferred Data Transfer ................. 16

 

Latency......................................................................................... 17

 

Flowcharts ................................................................................... 17

 

Applications Information .............................................................. 20

 

Grounding and Layout .............................................................. 20

 

Interfacing the AD9835 to Microprocessors .......................... 20

 

AD9835-to-ADSP-21xx Interface ............................................ 20

 

AD9835-to-68HC11/68L11 Interface...................................... 21

 

AD9835-to-80C51/80L51 Interface......................................... 21

 

AD9835-to-DSP56002 Interface .............................................. 21

 

Evaluation Board ............................................................................ 22

 

System Demonstration Platform.............................................. 22

 

AD9835 to SPORT Interface..................................................... 22

 

XO vs. External Clock................................................................ 22

 

Power Supply............................................................................... 22

 

Evaluation Board Schematics and Layout............................... 23

 

Ordering Information.................................................................... 26

 

Bill of Materials........................................................................... 26

 

Outline Dimensions ....................................................................... 27

 

Ordering Guide .......................................................................... 27

 

REVISION HISTORY

9/11—Rev. 0 to Rev. A

Updated Format..................................................................Universal

Changes to Features and Applications........................................... 1

Changes to Specification Statement ............................................... 3

Changes to Figure 2.......................................................................... 4

Changes to Timing Characteristics Statement ............................. 5

Replaced Evaluation Board Section; Renumbered

Sequentially ..................................................................................... 22

Changes to Bill of Materials .......................................................... 27

Changes to Ordering Guide .......................................................... 28

7/98—Revision 0: Initial Version