AD9271 datasheet(3/61 Pages) AD

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AD9271

Rev. B | Page 2 of

TABLE OF CONTENTS

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

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

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

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

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

Product Highlights ........................................................................... 3

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

AC Specifications.......................................................................... 4

Digital Specifications ................................................................... 7

Switching Specifications .............................................................. 8

ADC Timing Diagrams ............................................................... 9

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

Thermal Impedance ................................................................... 10

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

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

Equivalent Circuits ......................................................................... 14

Typical Performance Characteristics ........................................... 16

Theory of Operation ...................................................................... 20

Ultrasound................................................................................... 20

Channel Overview...................................................................... 21

Input Overdrive .......................................................................... 23

CW Doppler Operation............................................................. 24

TGC Operation........................................................................... 25

ADC ............................................................................................. 27

Clock Input Considerations...................................................... 28

Serial Port Interface (SPI).............................................................. 35

Hardware Interface..................................................................... 35

Memory Map .................................................................................. 37

Reading the Memory Map Table.............................................. 37

Reserved Locations .................................................................... 37

Default Values ............................................................................. 37

Logic Levels................................................................................. 37

Applications Information .............................................................. 41

Design Guidelines ...................................................................... 41

Evaluation Board ............................................................................ 42

Power Supplies ............................................................................ 42

Input Signals................................................................................ 42

Output Signals ............................................................................ 42

Default Operation and Jumper Selection Settings................. 43

Quick Start Procedure ............................................................... 44

Schematics and Artwork ........................................................... 45

Outline Dimensions ....................................................................... 58

Ordering Guide .......................................................................... 58

REVISION HISTORY

5/09—Rev. A to Rev. B

Changes to Figure 27...................................................................... 17

Changes to Figure 40 and Figure 41............................................. 21

Changes to Ordering Guide .......................................................... 58

12/07—Rev. 0 to Rev. A

Change to AC Specifications Text .................................................. 4

Added Input Noise Current ............................................................ 4

Added Noise Figure.......................................................................... 4

Changes to Signal-to-Noise Ratio Units........................................ 4

Changes to Harmonic Distortion Units ........................................ 5

Added Endnote 3 .............................................................................. 6

Changes to Table 6.......................................................................... 11

Inserted Figure 19 and Figure 21.................................................. 16

Changes to Figure 20...................................................................... 16

Changes to Theory of Operation Section.................................... 20

Changes to Figure 40 and Figure 41............................................. 21

Change to Active Impedance Matching Section ........................ 22

Changes to LNA Noise Section .................................................... 22

Changes to Figure 43...................................................................... 22

Change to Input Overload Protection Section ........................... 23

Changes to TGC Operation Section ............................................ 25

Changes to Gain Control Section................................................. 26

Changes to Figure 52...................................................................... 26

Change to Table 11 ......................................................................... 33

Changes to Serial Interface Port (SPI) Section ........................... 35

Changes to Hardware Interface Section ...................................... 35

Changes to Reading the Memory Map Table Section ............... 37

Added Applications Information and

Design Guidelines Sections...................................................... 41

Change to Input Signals Section................................................... 42

Changes to Figure 73...................................................................... 42

Changes to Table 16 ....................................................................... 55

6/07—Revision 0: Initial Version

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