link to page 1 link to page 1 link to page 1 link to page 1 link to page 3 link to page 4 link to page 6 link to page 7 link to page 7 link to page 7 link to page 8 link to page 9 link to page 10 link to page 13 link to page 13 link to page 14 link to page 15 link to page 16 link to page 16 link to page 16 link to page 16 link to page 17 link to page 17 link to page 18 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 24 link to page 24 link to page 25 link to page 26 AD7688Data SheetTABLE OF CONTENTS Features .. 1 Driver Amplifier Choice ... 15 Applications ... 1 Single-to-Differential Driver .. 15 Application Diagram .. 1 Voltage Reference Input .. 15 General Description ... 1 Power Supply ... 15 Revision History ... 2 Supplying the ADC from the Reference .. 16 Specifications ... 3 Digital Interface .. 16 Timing Specifications ... 5 CS MODE 3-Wire, No BUSY Indicator .. 17 Absolute Maximum Ratings .. 6 CS Mode 3-Wire with BUSY Indicator ... 18 Thermal Resistance .. 6 CS Mode 4-Wire, No BUSY Indicator ... 19 ESD Caution .. 6 CS Mode 4-Wire with BUSY Indicator ... 20 Pin Configuration and Function Descriptions ... 7 Chain Mode, No BUSY Indicator .. 21 Terminology .. 8 Chain Mode with BUSY Indicator ... 22 Typical Performance Characteristics ... 9 Application Hints ... 23 Circuit Information .. 12 Layout .. 23 Converter Operation .. 12 Evaluating the AD7688 Performance .. 23 Typical Connection Diagram ... 13 Outline Dimensions ... 24 Analog Input ... 14 Ordering Guide .. 25 REVISION HISTORY6/14—Rev. A to Rev. B Added Patent Footnote .. 1 Change to Evaluating the AD7688 Performance Section ... 23 Updated Outline Dimensions (Dimensions Not Changed, Lead-to-Pad Dimension Updated for JEDEC Compliance) ... 24 Changes to Ordering Guide .. 25 2/11—Rev. 0 to Rev. A Deleted QFN in Development Note .. Throughout Changes to Table 5 .. 6 Added Thermal Resistance Section and Table 6 .. 6 Changes to Figure 6 and Table 7 ... 7 Updated Outline Dimensions ... 24 Changes to Ordering Guide .. 25 4/05—Revision 0: Initial Version Rev. B | Page 2 of 28 Document Outline Features Applications Application Diagram General Description Table of Contents Revision History Specifications Timing Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Terminology Typical Performance Characteristics 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, No BUSY Indicator /CS Mode 3-Wire with BUSY Indicator /CS Mode 4-Write, No BUSY Indicator /CS Mode 4-Wire with BUSY Indicator Chain Mode, No BUSY Indicator Chain Mode with BUSY Indicator Application Hints Layout Evaluating the AD7688 Performance Outline Dimensions Ordering Guide
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