AD9834

Rev. C | Page 2 of 36

TABLE OF CONTENTS

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

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

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

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

Revision History ............................................................................... 3

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

Timing Characteristics ................................................................ 6

Absolute Maximum Ratings............................................................ 7

ESD Caution.................................................................................. 7

Pin Configuration and Function Descriptions............................. 8

Typical Performance Characteristics ........................................... 10

Terminology .................................................................................... 14

Theory of Operation ...................................................................... 15

Circuit Description......................................................................... 16

Numerically Controlled Oscillator Plus Phase Modulator ... 16

SIN ROM ..................................................................................... 16

Digital-to-Analog Converter (DAC) ....................................... 16

Comparator ................................................................................. 16

Regulator...................................................................................... 17

Output Voltage Compliance...................................................... 17

Functional Description .................................................................. 18

Serial Interface ............................................................................ 18

Powering Up the AD9834 ......................................................... 18

Latency......................................................................................... 18

Control Register ......................................................................... 18

Frequency and Phase Registers ................................................ 20

Writing to a Frequency Register............................................... 21

Writing to a Phase Register ....................................................... 21

RESET Function ......................................................................... 21

SLEEP Function.......................................................................... 21

SIGN BIT OUT Pin.................................................................... 22

The IOUT and IOUTB Pins...................................................... 22

Applications Information .............................................................. 23

Grounding and Layout .................................................................. 26

Interfacing to Microprocessors..................................................... 27

AD9834 to ADSP-21xx Interface ............................................. 27

AD9834 to 68HC11/68L11 Interface....................................... 27

AD9834 to 80C51/80L51 Interface .......................................... 28

AD9834 to DSP56002 Interface ............................................... 28

Evaluation Board ............................................................................ 29

System Development Platform ................................................. 29

AD9834 to SPORT Interface..................................................... 29

XO vs. External Clock................................................................ 29

Power Supply............................................................................... 29

Evaluation Board Schematics ................................................... 30

Evaluation Board Layout........................................................... 32

Outline Dimensions ....................................................................... 35

Ordering Guide .......................................................................... 35