AD604

Rev. D | Page 2 of 32

TABLE OF CONTENTS

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

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

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

General Description ......................................................................... 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 ...................................................................... 13

Preamplifier................................................................................. 14

Differential Ladder (Attenuator).............................................. 15

AC Coupling ............................................................................... 16

Gain Control Interface............................................................... 16

Active Feedback Amplifier (Fixed Gain Amp)....................... 16

Applications Information .............................................................. 18

An Ultralow Noise AGC Amplifier with 82 dB to 96 dB Gain

Range............................................................................................ 19

Ultralow Noise, Differential Input-Differential Output VGA

....................................................................................................... 21

Medical Ultrasound TGC Driving the AD9050, a 10-Bit, 40

MSPS ADC.................................................................................. 22

Evaluation Board ............................................................................ 24

Using the Preamplifier............................................................... 24

DSX Input Connections ............................................................ 24

Preamplifier Gain ....................................................................... 25

Outputs ........................................................................................ 25

DC Operating Conditions......................................................... 25

Evaluation Board Artwork and Schematic.................................. 26

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

Ordering Guide .......................................................................... 29

REVISION HISTORY

1/08—Rev. C to Rev. D

Changes to AC Coupling Section................................................. 16

Changes to Applications Information Section............................ 18

Changes to An Ultralow Noise AGC Amplifier with 82 dB to

96 dB Gain Range Section ............................................................. 19

Changes to Figure 55 and Figure 56............................................. 24

Changes to Cascaded DSX Section and Outputs Section ......... 25

Changes to Figure 57 to Figure 60................................................ 26

Changes to Figure 61 and Table 6................................................. 27

Changes to Ordering Guide .......................................................... 29

3/07—Rev. B to Rev. C

Added Evaluation Board Section ................................................. 24

Added Evaluation Board Artwork and Schematics Section ..... 26

Changes to Ordering Guide .......................................................... 29

12/06—Rev. A to Rev. B

Changes to General Description .................................................... 1

Changes to Figure 54...................................................................... 23

Changes to Ordering Guide .......................................................... 25

1/04—Rev. 0 to Rev. A

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

Changes to Absolute Maximum Ratings........................................3

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

Changes to Figure 1 Caption............................................................5

Changes to Figure 11 Caption .........................................................6

Changes to Figure 17.........................................................................6

Changes to Figure 51...................................................................... 17

Updated Outline Dimensions....................................................... 18

10/96—Revision 0: Initial Version