Datasheet

AD8235
Rev. 0 | Page 2 of 20
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Connection Diagram ....................................................................... 1
Pin Configuration ............................................................................. 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 7
Thermal Resistance ...................................................................... 7
Pin Configuration and Function Descriptions ............................. 8
Typical Performance Characteristics ............................................. 9
Theory of Operation ...................................................................... 14
Basic Operation .......................................................................... 14
Gain Selection ............................................................................. 14
Shutdown Feature ....................................................................... 15
Layout Recommendations ........................................................ 15
Reference Terminal .................................................................... 16
Power Supply Regulation and Bypassing ................................ 16
Input Bias Current Return Path ............................................... 17
Input Protection ......................................................................... 17
RF Interference ........................................................................... 17
Common-Mode Input Voltage Range ..................................... 18
Applications Information .............................................................. 19
AC-Coupled Instrumentation Amplifier ................................ 19
Low Power Heart Rate Monitor ............................................... 19
Outline Dimensions ....................................................................... 20
Ordering Guide .......................................................................... 20
REVISION HISTORY
8/09—Revision 0: Initial Version