AD8331/AD8332
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
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
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
Rev. C | Page 2 of 32
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