ADA4938-1

Preliminary Technical Data

Rev. PrD | Page 2 of 14

TABLE OF CONTENTS

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

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

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

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

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

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

Dual Supply Operation ................................................................ 3

Single Supply Operation .............................................................. 5

Absolute Maximum Ratings............................................................ 7

Thermal Resistance ...................................................................... 7

ESD Caution.................................................................................. 7

Pin Configuration and Function Descriptions............................. 8

Operational Description.................................................................. 9

Definition of Terms.......................................................................9

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

Analyzing an Application Circuit ............................................ 10

Setting the Closed-Loop Gain .................................................. 10

Estimating the Output Noise Voltage ...................................... 10

The Impact of Mismatches in the Feedback Networks ......... 11

Calculating the Input Impedance of an Application Circuit 11

Input Common-Mode Voltage Range in Single-Supply

Applications ................................................................................ 11

Setting the Output Common-Mode Voltage .......................... 11

Layout, Grounding, and Bypassing.............................................. 13

Outline Dimensions ....................................................................... 14

Ordering Guide .......................................................................... 14

REVISION HISTORY

05/07—Rev. PrC to Rev. PrD

Changes to Features.......................................................................... 1

Changes to Figure 1.......................................................................... 1

Changes to Table 1............................................................................ 3

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

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

Changes to Table 5 ........................................................................... 8

Added to Operational Description Section .................................. 9

Added to Theory of Operation Section ....................................... 10

Added to Layout, Grounding, and Bypassing Section............... 13

04/07—Rev. PrB to Rev. PrC

Changes to Features.......................................................................... 1

Changes to Table 1............................................................................ 3

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

Changes to Table 3............................................................................ 7

Changes to Table 4............................................................................ 7

Added Figure 2 ................................................................................. 7

Changes to Figure 4.......................................................................... 9

Changes to Ordering Guide ............................................................ 9

01/07—Rev. PrA to Rev. PrB

Changes to Features.......................................................................... 1

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

Changes to Table 1............................................................................ 3

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

12/06—Revision PrA: Initial Version