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AD9273

Rev. B | Page 2 of 48

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 ................................................................... 8

Switching Specifications .............................................................. 9

ADC Timing Diagrams ................................................................. 10

Absolute Maximum Ratings.......................................................... 11

Thermal Impedance ................................................................... 11

ESD Caution................................................................................ 11

Pin Configuration and Function Descriptions........................... 12

Typical Performance Characteristics ........................................... 15

Equivalent Circuits ......................................................................... 19

Theory of Operation ...................................................................... 21

Ultrasound .................................................................................. 21

Channel Overview ..................................................................... 22

Input Overdrive .......................................................................... 25

CW Doppler Operation............................................................. 25

TGC Operation........................................................................... 27

ADC ............................................................................................. 31

Clock Input Considerations...................................................... 31

Serial Port Interface (SPI).............................................................. 38

Hardware Interface..................................................................... 38

Memory Map .................................................................................. 40

Reading the Memory Map Table.............................................. 40

Reserved Locations .................................................................... 40

Default Values ............................................................................. 40

Logic Levels................................................................................. 40

Outline Dimensions ....................................................................... 44

Ordering Guide .......................................................................... 45

REVISION HISTORY

7/09—Rev. A to Rev. B

Added BGA Package ..........................................................Universal

Changes to Features and General Description Sections.............. 1

Changes to Product Highlights Section......................................... 3

Changes to Full-Channel (TGC) Characteristics Parameter,

Table 1 ............................................................................................ 4

Changes to Gain Control Interface Parameter and to CW

Doppler Mode Parameter, Table 1.............................................. 6

Change to Wake-Up Time (Standby), GAIN+ = 0.8 V

Parameter....................................................................................... 9

Changes to Figure 2 and Figure 3................................................. 10

Changes to Table 4.......................................................................... 11

Addded Figure 5; Renumbered Sequentially .............................. 12

Changes to Table 6.......................................................................... 13

Changes to Figure 34 and Figure 35............................................. 20

Changes to Ultrasound Section .................................................... 21

Changes to Low Noise Amplifier (LNA) Section....................... 22

Changes to Active Impedance Matching Section and

Figure 40 ...................................................................................... 23

Changes to LNA Noise Section .................................................... 24

Changes to Input Overload Protection Section and Figure 44 .......25

Changes to Figure 48...................................................................... 28

Changes to Figure 49 and Figure 50............................................. 29

Changes to Clock Input Considerations Section and to

Figure 56 to Figure 59 ................................................................ 31

Changes to Digital Outputs and Timing Section ....................... 33

Changes to CSB Pin Section ......................................................... 36

Changes to Reading the Memory Map Table Section ............... 40

Updated Outline Dimensions....................................................... 44

Changes to Ordering Guide .......................................................... 45

4/09—Revision A: Initial Version

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