Datasheet AD7817, AD7818 (Analog Devices) - 2

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AD7817/AD7818 Data Sheet TABLE OF CONTENTS
Features .. 1  Converter Details ... 12  Applications ... 1  Typical Connection Diagram ... 12  Functional Block Diagrams ... 1  Analog Inputs ... 12  General Description ... 1  On-Chip Reference .. 13  Product Highlights ... 1  ADC Transfer Function ... 13  Revision History ... 2  Temperature Measurement ... 14  Specifications ... 3  Temperature Measurement Error Due to Reference Error ... 14  Timing Characteristics .. 6  Self-Heating Considerations ... 14  Absolute Maximum Ratings .. 7  Operating Modes .. 15  ESD Caution .. 7  Power vs. Throughput.. 17  Pin Configurations and Function Descriptions ... 8  AD7817 Serial Interface ... 17  Terminology .. 10  AD7818 Serial Interface Mode ... 18  Control Byte .. 11  Outline Dimensions ... 19  Circuit Information .. 12  Ordering Guide .. 20 
REVISION HISTORY 11/15—Rev. D to Rev. E 9/04—Rev. B to Rev. C
Changes to Title, Figure 1, and Figure 2 .. 1 Changes to Ordering Guide ... 6 Change to Temperature Sensor (AD7818 Only) Parameter, Changes to Operating Modes Section and Figure 16 .. 13 Table 1 .. 4 Changes to Figure 17 .. 14 Change to Power Requirements (AD7818 Only) Parameter, Changes to AD7817 Serial Interface, Read Operation Section Table 1 .. 5 and Figure 20 ... 15 Changes to Figure 21 .. 16
10/12—Rev. C to Rev. D
Deleted AD7816.. Universal Changes to Format ... Universal Deleted Figure 15; Renumbered Sequentially .. 14 Updated Outline Dimensions ... 19 Changes to Ordering Guide .. 20 Rev. E | Page 2 of 20 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAMS GENERAL DESCRIPTION PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TERMINOLOGY CONTROL BYTE Address Register Overtemperature Register CIRCUIT INFORMATION CONVERTER DETAILS TYPICAL CONNECTION DIAGRAM ANALOG INPUTS Analog Input DC Acquisition Time AC Acquisition Time ON-CHIP REFERENCE ADC TRANSFER FUNCTION TEMPERATURE MEASUREMENT TEMPERATURE MEASUREMENT ERROR DUE TO REFERENCE ERROR SELF-HEATING CONSIDERATIONS OPERATING MODES Mode 1 Mode 2 POWER vs. THROUGHPUT AD7817 SERIAL INTERFACE Read Operation Write Operation Simplifying the Serial Interface AD7818 SERIAL INTERFACE MODE Read Operation Write Operation OUTLINE DIMENSIONS ORDERING GUIDE