Datasheet AD7687 (Analog Devices) - 3

link to page 1 link to page 1 link to page 1 link to page 1 link to page 4 link to page 4 link to page 7 link to page 9 link to page 9 link to page 9 link to page 10 link to page 11 link to page 12 link to page 15 link to page 15 link to page 15 link to page 16 link to page 17 link to page 18 link to page 18 link to page 18 link to page 18 link to page 19 link to page 19 link to page 20 link to page 21 link to page 22 link to page 23 link to page 24 link to page 25 link to page 26 link to page 26 link to page 26 link to page 27 link to page 27
AD7687 Data Sheet TABLE OF CONTENTS
Features .. 1 Driver Amplifier Choice ... 17 Applications ... 1 Single-to-Differential Driver .. 17 Typical Application Circuit ... 1 Voltage Reference Input .. 17 General Description ... 1 Power Supply ... 17 Revision History ... 3 Supplying the ADC from the Reference .. 18 Specifications ... 4 Digital Interface .. 18 Timing Specifications .. 6 CS Mode, 3-Wire Without BUSY Indicator ... 19 Absolute Maximum Ratings .. 8 CS Mode, 3-Wire with BUSY Indicator .. 20 Thermal Resistance .. 8 CS Mode, 4-Wire Without BUSY Indicator ... 21 ESD Caution .. 8 CS Mode, 4-Wire with BUSY Indicator .. 22 Pin Configurations and Function Descriptions ... 9 Chain Mode Without BUSY Indicator .. 23 Terminology .. 10 Chain Mode with BUSY Indicator ... 24 Typical Performance Characteristics ... 11 Applications Information .. 25 Theory of Operation .. 14 Layout .. 25 Circuit Information .. 14 Evaluating the Performance of the AD7687 ... 25 Converter Operation .. 14 Outline Dimensions ... 26 Typical Connection Diagram ... 15 Ordering Guide .. 26 Analog Input ... 16 Rev. E | Page 2 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