AD8331/AD8332/AD8334

Rev. E | Page 2 of 40

TABLE OF CONTENTS

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

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

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

Functional Block Diagram .............................................................. 1

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

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

Absolute Maximum Ratings............................................................ 7

ESD Caution.................................................................................. 7

Pin Configurations and Function Descriptions ........................... 8

Typical Performance Characteristics ........................................... 12

Test Circuits..................................................................................... 20

Measurement Considerations................................................... 20

Theory of Operation ...................................................................... 24

Overview...................................................................................... 24

Low Noise Amplifier (LNA) ..................................................... 25

Variable Gain Amplifier ............................................................ 27

Postamplifier ............................................................................... 28

Applications..................................................................................... 30

LNA—External Components.................................................... 30

Driving ADCs ............................................................................. 32

Overload ...................................................................................... 32

Optional Input Overload Protection. ...................................... 33

Layout, Grounding, and Bypassing.......................................... 33

Multiple Input Matching ........................................................... 33

Disabling the LNA...................................................................... 33

Ultrasound TGC Application ................................................... 34

High Density Quad Layout ....................................................... 34

Outline Dimensions ....................................................................... 39

Ordering Guide .......................................................................... 40