AD8348 データシートの表示（PDF） - Analog Devices

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AD8348

50 MHz to 1000 MHz Quadrature Demodulator / Compact, 28-lead TSSOP package

Analog Devices 

AD8348

TABLE OF CONTENTS

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

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

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

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

Revision History ............................................................................... 2

Specifications..................................................................................... 3

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

ESD Caution.................................................................................. 6

Pin Configuration and Function Descriptions............................. 7

Equivalent Circuits ........................................................................... 9

Typical Performance Characteristics ........................................... 11

VGA and Demodulator ............................................................. 11

Demodulator Using MXIP and MXIN.................................... 14

Final Baseband Amplifiers ........................................................ 15

VGA/Demodulator and Baseband Amplifier......................... 16

Theory of Operation ...................................................................... 18

VGA.............................................................................................. 18

Downconversion Mixers ........................................................... 18

Phase Splitter............................................................................... 18

I/Q Baseband Amplifiers........................................................... 18

REVISION HISTORY

4/06—Rev. 0 to Rev. A

Updated Format..................................................................Universal

Changes to Specifications ................................................................ 3

Changes to IF Inputs Section ........................................................ 20

Changes to Evaluation Board Section.......................................... 23

Changes to Table 6.......................................................................... 27

Changes to Ordering Guide .......................................................... 28

8/03—Revision 0: Initial Version

Enable........................................................................................... 18

Baseband Offset Cancellation................................................... 18

Applications..................................................................................... 20

Basic Connections...................................................................... 20

Power Supply............................................................................... 20

Device Enable ............................................................................. 20

VGA Enable ................................................................................ 20

Gain Control ............................................................................... 20

LO Inputs..................................................................................... 20

IF Inputs ...................................................................................... 20

MX Inputs ................................................................................... 20

Baseband Outputs ...................................................................... 21

Output DC Bias Level ................................................................ 21

Interfacing to Detector for AGC Operation............................... 21

Baseband Filters.......................................................................... 22

LO Generation ............................................................................ 23

Evaluation Board ........................................................................ 23

Outline Dimensions ....................................................................... 28

Ordering Guide .......................................................................... 28

Rev. A | Page 2 of 28

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