Datasheet AD7691 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 18-Bit, 1.5 LSB INL, 250 kSPS PulSAR® Differential ADC in MSOP/QFN |
| Pages / Page | 29 / 3 — AD7691. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY. 6/15—Rev. D to … |
| Revision | E |
| File Format / Size | PDF / 937 Kb |
| Document Language | English |
AD7691. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY. 6/15—Rev. D to Rev. E. 11/07—Rev. 0 to Rev. A. 7/14—Rev. C to Rev. D
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AD7691 Data Sheet TABLE OF CONTENTS
Features .. 1 Driver Amplifier Choice ... 16 Applications ... 1 Single-to-Differential Driver .. 16 Application Diagram .. 1 Voltage Reference Input .. 16 General Description ... 1 Power Supply ... 17 Revision History ... 2 Supplying the ADC from the Reference .. 17 Specifications ... 3 Digital Interface .. 17 Timing Specifications .. 5 CS Mode, 3-Wire Without Busy Indicator ... 18 Absolute Maximum Ratings .. 7 CS Mode, 3-Wire with Busy Indicator .. 19 Thermal Resistance .. 7 CS Mode, 4-Wire Without Busy Indicator ... 20 ESD Caution .. 7 CS Mode, 4-Wire with Busy Indicator .. 21 Pin Configurations and Function Descriptions ... 8 Chain Mode Without Busy Indicator .. 22 Typical Performance Characteristics ... 9 Chain Mode with Busy Indicator ... 23 Terminology .. 13 Application Hints ... 24 Theory of Operation .. 14 Layout .. 24 Circuit Information .. 14 Evaluating the AD7691 Performance .. 24 Converter Operation .. 14 Outline Dimensions ... 25 Typical Connection Diagram ... 15 Ordering Guide .. 25 Analog Inputs .. 15
REVISION HISTORY 6/15—Rev. D to Rev. E 11/07—Rev. 0 to Rev. A
Change to Digital Interface Section ... 17 Deleted QFN Package in Development References ... Universal Change to CS Mode, 3-Wire with Busy Indicator Section .. 19 Changes to Features, Applications, Figure 1 and Figure 2 ... 1 Change to CS Mode, 4-Wire with Busy Indicator Section .. 21 Changes to Accuracy, Table 2 .. 3 Changes to the Ordering Guide .. 25 Changes to Power Dissipation, Table 3 ... 4
Added Thermal Resistance Section .. 7
7/14—Rev. C to Rev. D
Changes to Figure 22.. 11 Changed QFN (LFCSP) to LFCSP .. Throughout Changes to Format ... 12 Changes to Features Section.. 1 Changes to Terminology Section ... 13 Added Patent Note, Note 1 .. 1 Changes to Format and Figure 29 .. 15 Change to Acquisition Time Parameter, Table 5 .. 6 Inserted Figure 31 ... 15 Changes to Evaluating the AD7691 Performance Section .. 24 Changes to Format ... 17 Updated Outline Dimensions ... 25 Changes to Figure 44.. 22 Changes to Ordering Guide .. 25 Changes to Figure 46.. 23 Updated QFN Outline Dimensions ... 25
3/12—Rev. B to Rev. C
Changes to Ordering Guide .. 25 Change to Table 9 ... 14 Changes to Ordering Guide .. 25
7/06—Revision 0: Initial Version 7/11—Rev. A to Rev. B
Changes to Common-Mode Input Range Min Parameter ... 3 Added EPAD Note to Figure 6 and Table 8 ... 8 Updated Outline Dimensions ... 25 Rev. E | 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 CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM ANALOG INPUTS 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 APPLICATION HINTS LAYOUT EVALUATING THE AD7691 PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE
AD7691 Data Sheet TABLE OF CONTENTS
Features .. 1 Driver Amplifier Choice ... 16 Applications ... 1 Single-to-Differential Driver .. 16 Application Diagram .. 1 Voltage Reference Input .. 16 General Description ... 1 Power Supply ... 17 Revision History ... 2 Supplying the ADC from the Reference .. 17 Specifications ... 3 Digital Interface .. 17 Timing Specifications .. 5 CS Mode, 3-Wire Without Busy Indicator ... 18 Absolute Maximum Ratings .. 7 CS Mode, 3-Wire with Busy Indicator .. 19 Thermal Resistance .. 7 CS Mode, 4-Wire Without Busy Indicator ... 20 ESD Caution .. 7 CS Mode, 4-Wire with Busy Indicator .. 21 Pin Configurations and Function Descriptions ... 8 Chain Mode Without Busy Indicator .. 22 Typical Performance Characteristics ... 9 Chain Mode with Busy Indicator ... 23 Terminology .. 13 Application Hints ... 24 Theory of Operation .. 14 Layout .. 24 Circuit Information .. 14 Evaluating the AD7691 Performance .. 24 Converter Operation .. 14 Outline Dimensions ... 25 Typical Connection Diagram ... 15 Ordering Guide .. 25 Analog Inputs .. 15
REVISION HISTORY 6/15—Rev. D to Rev. E 11/07—Rev. 0 to Rev. A
Change to Digital Interface Section ... 17 Deleted QFN Package in Development References ... Universal Change to CS Mode, 3-Wire with Busy Indicator Section .. 19 Changes to Features, Applications, Figure 1 and Figure 2 ... 1 Change to CS Mode, 4-Wire with Busy Indicator Section .. 21 Changes to Accuracy, Table 2 .. 3 Changes to the Ordering Guide .. 25 Changes to Power Dissipation, Table 3 ... 4
Added Thermal Resistance Section .. 7
7/14—Rev. C to Rev. D
Changes to Figure 22.. 11 Changed QFN (LFCSP) to LFCSP .. Throughout Changes to Format ... 12 Changes to Features Section.. 1 Changes to Terminology Section ... 13 Added Patent Note, Note 1 .. 1 Changes to Format and Figure 29 .. 15 Change to Acquisition Time Parameter, Table 5 .. 6 Inserted Figure 31 ... 15 Changes to Evaluating the AD7691 Performance Section .. 24 Changes to Format ... 17 Updated Outline Dimensions ... 25 Changes to Figure 44.. 22 Changes to Ordering Guide .. 25 Changes to Figure 46.. 23 Updated QFN Outline Dimensions ... 25
3/12—Rev. B to Rev. C
Changes to Ordering Guide .. 25 Change to Table 9 ... 14 Changes to Ordering Guide .. 25
7/06—Revision 0: Initial Version 7/11—Rev. A to Rev. B
Changes to Common-Mode Input Range Min Parameter ... 3 Added EPAD Note to Figure 6 and Table 8 ... 8 Updated Outline Dimensions ... 25 Rev. E | 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 CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM ANALOG INPUTS 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 APPLICATION HINTS LAYOUT EVALUATING THE AD7691 PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE
