ADA4896-2/ADA4897-1/ADA4897-2

Data Sheet

Rev. B | Page 2 of 28

TABLE OF CONTENTS

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

 

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

 

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

 

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

 

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

 

Specifications..................................................................................... 3

 

±5 V Supply ................................................................................... 3

 

+5 V Supply ................................................................................... 4

 

+3 V Supply ................................................................................... 6

 

Absolute Maximum Ratings............................................................ 8

 

Thermal Resistance ...................................................................... 8

 

Maximum Power Dissipation ..................................................... 8

 

ESD Caution.................................................................................. 8

 

Pin Configurations and Function Descriptions ........................... 9

 

Typical Performance Characteristics ........................................... 11

 

Theory of Operation ...................................................................... 17

 

Amplifier Description................................................................ 17

 

Input Protection ......................................................................... 17

 

Disable Operation ...................................................................... 17

 

DC Errors .................................................................................... 18

 

Bias Current Cancellation ......................................................... 18

 

Noise Considerations................................................................. 19

 

Capacitance Drive ...................................................................... 19

 

Applications Information .............................................................. 20

 

Typical Performance Values...................................................... 20

 

Low Noise, Gain Selectable Amplifier..................................... 21

 

Medical Ultrasound Applications ............................................ 22

 

Layout Considerations............................................................... 24

 

Outline Dimensions ....................................................................... 25

 

Ordering Guide .......................................................................... 27

 

REVISION HISTORY

4/12—Rev. A to Rev. B

Changed 6-Lead Single SOT-23 (ADA4897-1) Thermal

Reistance from 306°C/W to 150°C/W........................................... 8

Changes to Figure 3.......................................................................... 8

10/11—Rev. 0 to Rev. A

Added ADA4897-2 and 10-Lead MSOP .........................Universal

Change to Table 1 ............................................................................. 1

Changes to Table 3............................................................................ 3

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

Changes to Table 5............................................................................ 6

Changes to Table 7 and Figure 3..................................................... 8

Changes to Figure 4, Table 8, and Table 9 ..................................... 9

Added Figure 8 and Table 10; Renumbered Sequentially ......... 10

Changed Summary Statement for Typical Performance

Characteristics Section................................................................... 11

Changes to Figure 18...................................................................... 12

Change to Figure 20 ....................................................................... 12

Change to Figure 26; Moved Figure 26........................................ 13

Changes to Figure 37...................................................................... 15

Changes to Amplifier Description Section, Disable Operation

Section, Figure 44, and Figure 45 ................................................. 17

Added Bias Current Cancellation Section, Figure 47,

Table 11, and Table 12.................................................................... 18

Changes to Table 13 ....................................................................... 20

Changes to Low Noise, Gain Selectable Amplifier Section

and Figure 52................................................................................... 21

Deleted Figure 51............................................................................ 22

Changes to Power Supply Bypassing Section ............................. 24

Moved Figure 57 ............................................................................. 25

Moved Figure 58 ............................................................................. 26

Added Figure 60 ............................................................................. 27

Changes to Ordering Guide .......................................................... 27

7/11—Revision 0: Initial Version