AD8331/AD8332

Rev. C | Page 2 of 32

TABLE OF CONTENTS

REVISION HISTORY.................................................................. 2

AD8331, AD8332—Specifications.................................................. 3

Absolute Maximum Ratings............................................................ 6

ESD CAUTION ............................................................................ 6

AD8331, AD8332—Typical Performance Characteristics .......... 7

Test Circuits..................................................................................... 15

Theory of Operation ...................................................................... 17

Overview...................................................................................... 17

Low Noise Amplifier (LNA)...................................................... 17

Variable Gain Amplifier............................................................. 19

Postamplifier ............................................................................... 21

Applications..................................................................................... 22

LNA – External Components ................................................... 22

Driving ADCs ............................................................................. 24

Overload ...................................................................................... 24

Optional Input Overload Protection. ...................................... 25

Layout, Grounding, And Bypassing ......................................... 25

Multiple Input Matching ........................................................... 25

Disabling the LNA...................................................................... 25

Measurement Considerations................................................... 26

Ultrasound TGC Application ................................................... 26

Pin Configuration and Function Descriptions........................... 30

AD8331........................................................................................ 30

AD8332........................................................................................ 31

Outline Dimensions ....................................................................... 32

Ordering Guide .......................................................................... 32

REVISION HISTORY

Revision C

11/03—Data Sheet Changed from REV. B to REV. C

Addition of New Part...........................................................Universal

Changes to Figures ...............................................................Universal

Updated Outline Dimensions..........................................................32

5/03—Data Sheet Changed from REV. A to REV. B

Edits to Ordering Guide....................................................................32

Edits to Ultrasound TGC Application section................................25

Added Figure 71, Figure 72, and Figure 73......................................26

Updated Outline Dimensions............................................................31

2/03—Data Sheet Changed from REV. 0 to REV. A

Edits to Ordering Guide.....................................................................32