Datasheet

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