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ADA4938-1
Preliminary Technical Data
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
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
Rev. PrD | Page 2 of 14
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