AD608

Rev. C | Page 2 of 16

TABLE OF CONTENTS

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

 

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

 

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

 

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

 

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

 

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

 

Absolute Maximum Ratings............................................................ 4

 

Thermal Resistance ...................................................................... 4

 

ESD Caution.................................................................................. 4

 

Pin Configuration and Function Descriptions............................. 5

 

Typical Performance Characteristics ............................................. 6

 

Test Circuits....................................................................................... 8

 

Theory of Operation ........................................................................ 9

 

Mixer...............................................................................................9

 

Mixer Gain .....................................................................................9

 

IF Filter Terminations................................................................ 10

 

The Logarithmic IF Amplifier .................................................. 10

 

Offset Feedback Loop ................................................................ 10

 

RSSI Output ................................................................................ 11

 

Digitizing the RSSI ..................................................................... 11

 

Power Consumption .................................................................. 11

 

Troubleshooting.......................................................................... 11

 

Applications Information .............................................................. 12

 

Outline Dimensions ....................................................................... 13

 

Ordering Guide .......................................................................... 13

 

REVISION HISTORY

2/09—Rev. B to Rev. C

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

Reorganized Layout............................................................Universal

Change to General Description Section ........................................ 1

Changes to DC Level Parameter, Operating Range Parameter,

Added Typical Performance Characteristics Heading ................ 6

Added Test Circuits Heading .......................................................... 8

Changes to Figure 17 and Figure 19............................................... 8

Change to Figure 22 ......................................................................... 9

Changes to Table 5............................................................................ 9

Updated Outline Dimensions ....................................................... 13

Changes to Ordering Guide .......................................................... 13