AD8244

Data Sheet

TABLE OF CONTENTS

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

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

Pin Configuration............................................................................. 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 ...................................................................... 14

Overview...................................................................................... 14

Guarding...................................................................................... 14

Input Protection ......................................................................... 15

Layout Considerations............................................................... 15

Differential Signal Chains ......................................................... 15

Low Output Impedance vs. Frequency.................................... 15

Applications Information .............................................................. 16

Electrocardiogram (ECG)......................................................... 16

Filtering........................................................................................ 16

Photodiode Amplifier................................................................ 17

Low Noise, JFET Input Buffer .................................................. 18

Outline Dimensions....................................................................... 19

Ordering Guide .......................................................................... 19

REVISION HISTORY

12/14—Rev. 0 to Rev. A

Added Figure 1 Caption and Changes to Figure 2....................... 1

Changes to Low Output Impedance vs. Frequency Section ..... 15

Changes to Electrocardiogram (ECG) Section, Filtering Section,

Figure 42, and Figure 43 ................................................................ 16

Changes to Figure 44...................................................................... 17

Changes to Ordering Guide .......................................................... 19

10/13—Revision 0: Initial Version

Rev. A | Page 2 of 20