Data SheetAD7687REVISION HISTORY12/15—Rev. D to Rev. E4/15—Rev. C to Rev. D Deleted Figure 1; Renumbered Sequentially ... 1 Added Patent Note, Note 1 .. 1 Changes to Features Section and General Description Section ... 1 Changes to SNR Degradation Equation, Driver Amplifier Change to Signal-to-(Noise + Distortion) Parameter, Table 2 ... 4 Choice Section ... 16 Added Timing Diagrams Section .. 7 Changes to Ordering Guide ... 26 Moved Figure 2 and Figure 3 ... 7 Changes to Table 8 .. 9 7/14—Rev. B to Rev. C Changes to Figure 7 Caption, Figure 8 Caption, Figure 10 Deleted QFN ... Throughout Caption, and Figure 11 Caption .. 11 Changed Application Diagram Section to Typical Application Added Theory of Operation Section .. 14 Circuit Section ... 1 Changes to Analog Input Section ... 16 Change to Features Section .. 1 Changes to Drive Amplifier Choice Section, Table 10, Figure 30, Added Note 1 ... 1 Voltage Reference Input Section, and Power Supply Section ... 17 Changes to Figure 27 .. 14 Changes to Supplying the ADC from the Reference Section Changes to Evaluating the Performance of the AD7687 and Digital Interface Section ... 18 Section .. 24 Changed CS Mode, 3-Wire, No BUSY Indicator Section to CS Updated Outline Dimensions .. 25 Mode, 3-Wire Without BUSY Indicator Section .. 19 Changes to Ordering Guide ... 26 Changes to CS Mode, 3-Wire Without BUSY Indicator Section ... 19 Changes to CS Mode, 3-Wire with BUSY Indicator Section .. 20 8/11—Rev. A to Rev. B Changed CS Mode, 4-Wire, No BUSY Indicator Section to CS Changes to Table 7 .. 7 Mode, 4-Wire Without BUSY Indicator Section .. 21 Changes to Ordering Guide ... 26 Changes to CS Mode, 4-Wire Without BUSY Indicator Section ... 21 2/11—Rev. 0 to Rev. A Changes to CS Mode, 4-Wire with BUSY Indicator Section .. 22 Deleted QFN in Development Note .. Throughout Changed Chain Mode, No BUSY Indicator Section to Chain Changes to Table 6 .. 7 Mode Without BUSY Indicator Section ... 23 Added Thermal Resistance Section and Table 7 ... 7 Changes to Chain Mode Without BUSY Indicator Section, Changes to Figure 6 and Table 8 ... 8 Figure 42 Caption, and Figure 43 Caption ... 23 Updated Outline Dimensions .. 25 Changes to Chain Mode with BUSY Indicator Section ... 24 Changes to Ordering Guide ... 26 Changes to Layout Section ... 25 Changed Application Hints Section to Application 4/05—Revision 0: Initial Version Recommendations Section .. 25 Changes to Ordering Guide ... 26 Rev. E | Page 3 of 26 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS Timing Diagrams ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM ANALOG INPUT DRIVER AMPLIFIER CHOICE SINGLE-TO-DIFFERENTIAL DRIVER VOLTAGE REFERENCE INPUT POWER SUPPLY SUPPLYING THE ADC FROM THE REFERENCE DIGITAL INTERFACE CS\ MODE, 3-WIRE WITHOUT BUSY INDICATOR CS\ MODE, 3-WIRE WITH BUSY INDICATOR CS\ MODE, 4-WIRE WITHOUT BUSY INDICATOR CS\ MODE, 4-WIRE WITH BUSY INDICATOR CHAIN MODE WITHOUT BUSY INDICATOR CHAIN MODE WITH BUSY INDICATOR APPLICATIONS INFORMATION LAYOUT EVALUATING THE PERFORMANCE OF THE AD7687 OUTLINE DIMENSIONS ORDERING GUIDE
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