AD600/AD602

Rev. E | Page 2 of 28

TABLE OF CONTENTS

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

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

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

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

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

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

Absolute Maximum Ratings............................................................ 5

ESD Caution.................................................................................. 5

Pin Configuration and Function Descriptions............................. 6

Typical Performance Characteristics ............................................. 7

Theory of Operation ...................................................................... 10

Noise Performance ..................................................................... 10

The Gain-Control Interface ...................................................... 11

Signal-Gating Inputs .................................................................. 11

Common-Mode Rejection ........................................................ 11

Achieving 80 dB Gain Range .................................................... 12

Sequential Mode (Maximum SNR) ......................................... 12

Parallel Mode (Simplest Gain-Control Interface).................. 13

Low Ripple Mode (Minimum Gain Error) ............................. 13

Applications..................................................................................... 15

Time-Gain Control (TGC) and Time-Variable

Gain (TVG) ................................................................................. 15

Increasing Output Drive............................................................ 15

Driving Capacitive Loads.......................................................... 15

Realizing Other Gain Ranges ................................................... 16

An Ultralow Noise VCA............................................................ 16

A Low Noise, 6 dB Preamplifier ............................................... 16

A Low Noise AGC Amplifier with 80 dB Gain Range .......... 17

A Wide Range, RMS-Linear dB Measurement System (2 MHz

AGC Amplifier with RMS Detector)....................................... 19

100 dB to 120 dB RMS Responding Constant Bandwidth

AGC Systems with High Accuracy dB Outputs ..................... 21

A 100 dB RMS/AGC System with Minimal Gain Error

(Parallel Gain with Offset) ........................................................ 22

A 120 dB RMS/AGC System with Optimal SNR

(Sequential Gain) ....................................................................... 23

Outline Dimensions ....................................................................... 27

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

REVISION HISTORY

1/06—Rev. D to Rev. E

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

Changes to Table 2............................................................................ 5

Changes to The Gain-Control Interface Section........................ 11

Updated Outline Dimensions ....................................................... 27

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

3/04—Rev. C to Rev. D

Changes to Specifications ................................................................ 2

Changes to Ordering Guide ............................................................ 3

Changes to Figure 3.......................................................................... 8

Changes to Figure 29...................................................................... 18

Updated Outline Dimensions ....................................................... 20

5/02—Rev. B to Rev. C

Changes to Specifications.................................................................2

Renumber Tables and TPCs...................................................Global

8/01—Rev. A to Rev. B

Changes to Accuracy Section of AD600A/AD602A column......2