Data Sheet

ADA4620-1, ADA4620-2

analog.com

Rev. 0

2 of 49

TABLE OF CONTENTS

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

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

Typical Application Diagram ................................................................................................................................................................1

General Description ..............................................................................................................................................................................1

Revision History ....................................................................................................................................................................................3

Specifications........................................................................................................................................................................................4

Electrical Characteristics..................................................................................................................................................................4

High Common-Mode Voltage Operation ((V+) − 4.4 V < VCM ≤ (V+)) ..................................................................................................8

Absolute Maximum Ratings ................................................................................................................................................................10

Thermal Characteristics .................................................................................................................................................................10

Maximum Power Dissipation .....................................................................................................................................................10

Electrostatic Discharge (ESD) Ratings............................................................................................................................................12

ESD Ratings for AD4620-1...............................................................................................................................................................12

ESD Ratings for AD4620-2...............................................................................................................................................................12

Pin Configurations and Function Descriptions ..................................................................................................................................13

Typical Performance Characteristics .................................................................................................................................................14

Theory of Operation............................................................................................................................................................................32

Input and Gain Stages ....................................................................................................................................................................32

Output Stage...................................................................................................................................................................................32

Compensation ................................................................................................................................................................................33

No Phase Reversal ..........................................................................................................................................................................33

Electrical Overstress Protection.....................................................................................................................................................33

Applications Information....................................................................................................................................................................35

Photodiode Preamplifier/Transimpedance Amplifier...................................................................................................................35

ADC Driving .....................................................................................................................................................................................39

Multiplexer Compatibility...............................................................................................................................................................41

Third-Order Low-Pass Sallen-Key Filter.........................................................................................................................................43

Large Signal Behavior.....................................................................................................................................................................44

Recommended Power Solution .....................................................................................................................................................46

Layout Guidelines...........................................................................................................................................................................46

Outline Dimensions.............................................................................................................................................................................48

Ordering Guide....................................................................................................................................................................................48