Datasheet AD7902 (Analog Devices) - 3

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AD7902 Data Sheet TABLE OF CONTENTS
Features .. 1 Typical Connection Diagram ... 15 Applications ... 1 Analog Inputs ... 15 General Description ... 1 Driver Amplifier Choice ... 16 Functional Block Diagram .. 1 Voltage Reference Input .. 16 Revision History ... 2 Power Supply ... 17 Specifications ... 3 Digital Interface .. 17 Timing Specifications .. 5 CS Mode .. 18 Absolute Maximum Ratings .. 6 Chain Mode .. 22 ESD Caution .. 6 Applications Information .. 24 Pin Configuration and Function Descriptions ... 7 Simultaneous Sampling ... 24 Typical Performance Characteristics ... 8 Functional Saftey Considerations .. 25 Terminology .. 13 Layout ... 26 Theory of Operation .. 14 Evaluating Performance of the AD7902 .. 26 Circuit Information .. 14 Outline Dimensions ... 27 Converter Operation .. 14 Ordering Guide .. 27
REVISION HISTORY 8/15—Rev. A to Rev. B
Changed ADA4841-x to ADA4841-1/ADA4841-2 .. Throughout Change to Absolute Input Voltage Parameter, Table 2 .. 3 Changes to Voltage Reference Input Section .. 16 Updated Outline Dimensions ... 27
7/14—Rev. 0 to Rev. A
Changed Standby Current Unit from nA to μA ... 4 Changes to Power Supply Section .. 17
2/14—Revision 0: Initial Version
Rev. B | Page 2 of 28 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM ANALOG INPUTS DRIVER AMPLIFIER CHOICE VOLTAGE REFERENCE INPUT POWER SUPPLY DIGITAL INTERFACE CS MODE /CS Mode, 3-Wire Interface Without Busy Indicator /CS Mode, 3-Wire Interface with Busy Indicator /CS Mode, 4-Wire Interface Without Busy Indicator /CS Mode, 4-Wire Interface with Busy Indicator CHAIN MODE Chain Mode Without Busy Indicator Chain Mode with Busy Indicator APPLICATIONS INFORMATION SIMULTANEOUS SAMPLING FUNCTIONAL SAFTEY CONSIDERATIONS LAYOUT EVALUATING PERFORMANCE OF THE AD7902 OUTLINE DIMENSIONS ORDERING GUIDE NOTES