AD8331/AD8332/AD8334
TABLE OF CONTENTS
Features .............................................................................................. 1
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
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
Rev. E | Page 2 of 40