
AD600/AD602
TABLE OF CONTENTS
Features..............................................................................................1
Rev. E | Page 2 of 28
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