Datasheet

AD8222
Rev. A | Page 2 of 24
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3 
Absolute Maximum Ratings ............................................................ 6
Thermal Resistance ...................................................................... 6
ESD Caution .................................................................................. 6
Pin Configuration and Function Descriptions ............................. 7
Typical Performance Characteristics ............................................. 8
Theory of Operation ...................................................................... 15
Amplifier Architecture .............................................................. 15
Gain Selection ............................................................................. 15
Reference Terminal .................................................................... 16
Package Considerations ............................................................. 16
Layout .......................................................................................... 16
Input Bias Current Return Path ............................................... 17
Input Protection ......................................................................... 18
RF Interference ........................................................................... 18
Common-Mode Input Voltage Range ..................................... 18
Applications Information .............................................................. 19
Differential Output .................................................................... 19
Driving a Differential Input ADC ............................................ 20
Precision Strain Gage ................................................................. 20
Driving Cabling .......................................................................... 21
Outline Dimensions ....................................................................... 22
Ordering Guide .......................................................................... 23
REVISION HISTORY
2/10—Rev. 0 to Rev. A
Added LFCSP_VQ, CP-16-13 Package ............................ Universal
Changes to Features Section and Table 1 ...................................... 1
Changed V
IN+
to V
+IN
, V
IN−
to V
−IN
, and T to T
A
Throughout ..... 3
Change to Reference Input Parameter, Table 2 ............................. 4
Changed Output Short-Circuit Current to Output Short-Circuit
Duration, Table 5 .............................................................................. 6
Changes to Thermal Resistance Section and Table 6 ................... 6
Changes to Figure 2 .......................................................................... 7
Changes to Figure 19 ...................................................................... 10
Changes to Figure 43 ...................................................................... 14
Changes to Reference Terminal Section, Figure 45, and Package
Considerations Section .................................................................. 16
Deleted Thermal Pad Section ....................................................... 16
Added Package Without Thermal Pad and Package with
Thermal Pad Sections .................................................................... 16
Changes to Figure 46 ...................................................................... 17
Deleted Solder Wash Section ........................................................ 17
Changes to RFI and Antialising Filter Section ........................... 20
Updated Outline Dimensions ....................................................... 22
Changes to Ordering Guide .......................................................... 23
7/06—Revision 0: Initial Version