AD8235

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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