AD9956

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TABLE OF CONTENTS

Product Overview............................................................................. 3

Specifications..................................................................................... 4

Loop Measurement Conditions.................................................. 9

Absolute Maximum Ratings.......................................................... 10

ESD Caution................................................................................ 10

Pin Configuration and Function Descriptions........................... 11

Typical Performance Characteristics ........................................... 13

Typical Application Circuits.......................................................... 16

Application Circuit Explanations ............................................. 17

General Description ....................................................................... 18

DDS Core..................................................................................... 18

PLL Circuitry .............................................................................. 18

CML Driver................................................................................. 19

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

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

Synchronization Modes for Multiple Devices.............................. 20

Serial Port Operation ..................................................................... 22

Instruction Byte .......................................................................... 23

Serial Interface Port Pin Description....................................... 23

MSB/LSB Transfers .................................................................... 23

Register Map and Description ...................................................... 24

Control Function Register Descriptions ................................. 27

Outline Dimensions ....................................................................... 32

Ordering Guide .......................................................................... 32

REVISION HISTORY

7/04—Revision: Initial Version