AD9838 View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

AD9838

Mixed-Signal Front-End (MxFE) Processor for Broadband Communications

Analog Devices 

AD9838

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

Thermal Resistance ...................................................................... 6

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

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

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

Test Circuit ...................................................................................... 12

Terminology .................................................................................... 13

Theory of Operation ...................................................................... 14

Circuit Description......................................................................... 15

Numerically Controlled Oscillator Plus Phase Modulator ... 15

SIN ROM ..................................................................................... 15

Digital-to-Analog Converter (DAC) ....................................... 15

Comparator ................................................................................. 15

Regulator...................................................................................... 16

REVISION HISTORY

4/11—Rev. 0 to Rev. A

Change to Title.................................................................................. 1

Change to Figure 3 ........................................................................... 5

Change to Figure 8 ........................................................................... 9

4/11—Revision 0: Initial Version

Functional Description.................................................................. 17

Serial Interface ............................................................................ 17

Latency Period ............................................................................ 17

Control Register ......................................................................... 17

Frequency and Phase Registers ................................................ 19

Reset Function ............................................................................ 20

Sleep Function ............................................................................ 20

SIGN BIT OUT Pin.................................................................... 21

IOUT and IOUTB Pins ............................................................. 21

Powering Up the AD9838 ......................................................... 21

Applications Information .............................................................. 24

Grounding and Layout .............................................................. 24

Interfacing to Microprocessors................................................. 24

Evaluation Board ............................................................................ 26

System Demonstration Platform.............................................. 26

AD9838 to SPORT Interface..................................................... 26

Evaluation Kit ............................................................................. 26

Crystal Oscillator vs. External Clock....................................... 26

Power Supply............................................................................... 26

Evaluation Board Schematics ................................................... 27

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

Outline Dimensions ....................................................................... 30

Ordering Guide .......................................................................... 30

Rev. A | Page 2 of 32

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