link to page 1 link to page 1 link to page 1 link to page 1 link to page 2 link to page 3 link to page 3 link to page 5 link to page 7 link to page 7 link to page 7 link to page 7 link to page 8 link to page 9 link to page 16 link to page 17 link to page 18 link to page 19 link to page 19 link to page 19 link to page 19 link to page 20 link to page 20 link to page 22 link to page 22 link to page 22 link to page 22 link to page 23 link to page 24 link to page 25 link to page 25 ADA4950-1/ADA4950-2Data SheetTABLE OF CONTENTS Features .. 1 Theory of Operation .. 18 Applications ... 1 Applications Information .. 19 General Description ... 1 Analyzing an Application Circuit .. 19 Functional Block Diagrams ... 1 Selecting the Closed-Loop Gain ... 19 Revision History ... 2 Estimating the Output Noise Voltage .. 19 Specifications ... 3 Calculating the Input Impedance for an Application ±5 V Operation ... 3 Circuit .. 20 5 V Operation ... 5 Input Common-Mode Voltage Range ... 22 Absolute Maximum Ratings .. 7 Input and Output Capacitive AC Coupling .. 22 Thermal Resistance .. 7 Input Signal Swing Considerations .. 22 Maximum Power Dissipation ... 7 Setting the Output Common-Mode Voltage .. 22 ESD Caution .. 7 Layout, Grounding, and Bypassing .. 23 Pin Configurations and Function Descriptions ... 8 High Performance ADC Driving ... 24 Typical Performance Characteristics ... 9 Outline Dimensions ... 25 Test Circuits ... 16 Ordering Guide .. 25 Terminology .. 17 REVISION HISTORY 10/15—Rev. A to Rev. B Changed CP-16-2 to CP-16-21 ... Universal Changes to Figure 1 .. 1 Changes to Figure 5 .. 8 Updated Outline Dimensions ... 25 Changes to Ordering Guide .. 25 3/13—Rev. 0 to Rev. A Updated Outline Dimensions ... 25 Changes to Ordering Guide .. 25 5/09—Revision 0: Initial Version Rev. B | Page 2 of 26 Document Outline Features Applications General Description Functional Block Diagrams Table of Contents Revision History Specifications ±5 V Operation Differential Inputs to VOUT, dm Performance VOCM to VOUT, cm Performance General Performance 5 V Operation Differential Inputs to VOUT, dm Performance VOCM to VOUT, cm Performance General Performance Absolute Maximum Ratings Thermal Resistance Maximum Power Dissipation ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Test Circuits Terminology Theory of Operation Applications Information Analyzing an Application Circuit Selecting the Closed-Loop Gain Estimating the Output Noise Voltage Calculating the Input Impedance for an Application Circuit Terminating a Single-Ended Input Input Common-Mode Voltage Range Input and Output Capacitive AC Coupling Input Signal Swing Considerations Setting the Output Common-Mode Voltage Layout, Grounding, and Bypassing High Performance ADC Driving Outline Dimensions Ordering Guide
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