AD9954

Rev. B | Page 2 of 40

TABLE OF CONTENTS

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

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

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

Basic Block Diagram ........................................................................ 1

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

Functional Block Diagram .............................................................. 3

Electrical Specifications ................................................................... 4

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

Explanation of Test Levels ........................................................... 7

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

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

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

Theory of Operation ...................................................................... 13

Component Blocks ..................................................................... 13

Modes of Operation ................................................................... 16

Synchronization—Register Updates (I/O UPDATE) ............ 21

Serial Port Operation ................................................................. 23

Serial Interface Port Pin Descriptions ..................................... 24

MSB/LSB Transfers .................................................................... 24

RAM I/O via Serial Port ............................................................ 24

Instruction Byte .......................................................................... 25

Register Maps and Descriptions............................................... 25

Control Register Bit Descriptions ............................................ 29

Other Register Descriptions ..................................................... 31

Layout Considerations............................................................... 32

Detailed Programming Examples ................................................ 33

Single-Tone Mode ...................................................................... 33

Linear Sweep Mode.................................................................... 33

RAM Mode.................................................................................. 33

Suggested Application Circuits..................................................... 35

Evaluation Board Schematics........................................................ 36

Outline Dimensions ....................................................................... 39

Ordering Guide .......................................................................... 39

REVISION HISTORY

5/09—Rev. A to Rev. B

Changes to Figure 29 and Figure 30............................................. 24

Changes to Table 12........................................................................ 26

Changes to Figure 34...................................................................... 35

Updated Outline Dimensions ....................................................... 39

Changes to Ordering Guide .......................................................... 39

1/07—Rev. 0 to Rev. A

Changes to Layout ..............................................................Universal

Changes to Features, General Description, and Figure 1............ 1

Changes to Figure 2.......................................................................... 3

Changes to Table 1............................................................................ 4

Changes to Table 4............................................................................ 8

Changes to Figure 5 to Figure 10.................................................. 10

Changes to Figure 12...................................................................... 11

Changes to Figure 17 to Figure 18 Captions ............................... 12

Deleted Figure 19; Renumbered Sequentially ............................ 12

Added Table 5; Renumbered Sequentially .................................. 13

Changes to Component Block Section and Table 6 ................... 13

Changes to Figure 20...................................................................... 15

Changes to Modes of Operation Section and Table 8................ 16

Changes to Table 9.......................................................................... 17

Changes to Synchronization; Register Updates (I/O UPDATE)

Section and Figure 24..................................................................... 21

Changes to Serial Port Operation Section................................... 23

Changes to Serial Interface Port Pin Description Section,

MSB/LSB Transfers Section, and RAM I/O Via Serial Port

Section.............................................................................................. 24

Inserted Figure 29 and Figure 30; Renumbered Sequentially .. 24

Changes to Instruction Byte Section, Register Maps and

Descriptions Section, and Table 12 .............................................. 25

Changes to Table 13 ....................................................................... 26

Changes to Table 14 ....................................................................... 28

Added Single-Tone Mode Section, Linear Sweep Mode Section,

Table 15, and RAM Mode Section ............................................... 33

Added, and Table 16....................................................................... 34

Inserted Figure 35........................................................................... 36

Inserted Figure 36........................................................................... 37

Inserted Figure 37........................................................................... 38

Updated Outline Dimensions....................................................... 39

Changes to Ordering Guide .......................................................... 39

10/03—Revision 0: Initial Version