Datasheet AD7091R-2, AD7091R-4, AD7091R-8 (Analog Devices) - 2

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AD7091R-2/AD7091R-4/AD7091R-8 Data Sheet TABLE OF CONTENTS
Features .. 1 Addressing Registers .. 23 Applications ... 1 Conversion Result Register ... 24 Functional Block Diagram .. 1 Channel Register .. 25 General Description ... 1 Configuration Register .. 26 Revision History ... 2 Alert Indication Register ... 28 Specifications ... 3 Channel x Low Limit Register .. 30 Timing Specifications .. 5 Channel x High Limit Register ... 30 Absolute Maximum Ratings .. 7 Channel x Hysteresis Register .. 30 Thermal Resistance .. 7 Serial Port Interface .. 31 ESD Caution .. 7 Reading Conversion Result ... 31 Pin Configurations and Function Descriptions ... 8 Writing Data to the Registers ... 31 Typical Performance Characteristics ... 13 Reading Data from the Registers.. 31 Terminology .. 18 Power-On Device Initialization .. 33 Theory of Operation .. 19 Modes of Operation ... 34 Circuit Information .. 19 Normal Mode .. 34 Converter Operation .. 19 Power-Down Mode .. 34 ADC Transfer Function ... 19 ALERT (AD7091R-4 and AD7091R-8 Only) .. 35 Reference ... 19 BUSY (AD7091R-4 and AD7091R-8 Only) ... 35 Power Supply ... 20 Channel Sequencer .. 36 Device Reset .. 20 Daisy Chain ... 37 Typical Connection Diagram.. 20 Outline Dimensions ... 39 Analog Input ... 20 Ordering Guide .. 42 Driver Amplifier Choice .. 21 Registers ... 23
REVISION HISTORY 12/15—Rev. B to Rev. C
Changes to Table 5 ... 8 Change to the Reference Section .. 19 Added Figure 8 .. 9 Changes to Table 6 ... 9
11/14—Rev. A to Rev. B
Added Figure 10 ... 11 Added Endnote 1 .. 3 Changes to Table 7 .. 11 Added Total Power Dissipation (Normal Mode) of 0.080 mW ... 4 Added Power Supply Section and Table 8; Renumbered Changes to Table 2 .. 5 Sequentially ... 20 Added Device Reset Section and Figure 43; Renumbered Added Driver Amplifier Choice Section and Table 9 .. 21 Sequentially ... 20 Changes to Table 16 ... 26 Added Power-On Device Initialization Section and Figure 53 . 33 Changed Serial Interface Section to Serial Port Interface 7/14—Rev. 0 to Rev. A Section .. 31 Added 16-Lead LFCSP, 20-Lead LFCSP, and Changes to Figure 52.. 33 24-Lead LFCSP ... Universal Updated Outline Dimensions ... 38 Changes to Features Section.. 1 Changes to Ordering Guide .. 41 Changes to General Description Section .. 1 Changes to Table 1 .. 3
12/13—Revision 0: Initial Version
Changes to Table 4 .. 7 Added Figure 6; Renumbered Sequential y .. 8 Rev. C | Page 2 of 42 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS Timing Diagram ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION ADC TRANSFER FUNCTION REFERENCE POWER SUPPLY DEVICE RESET TYPICAL CONNECTION DIAGRAM ANALOG INPUT DRIVER AMPLIFIER CHOICE REGISTERS ADDRESSING REGISTERS CONVERSION RESULT REGISTER CHANNEL REGISTER CONFIGURATION REGISTER ALERT INDICATION REGISTER CHANNEL x LOW LIMIT REGISTER CHANNEL x HIGH LIMIT REGISTER CHANNEL x HYSTERESIS REGISTER SERIAL PORT INTERFACE READING CONVERSION RESULT WRITING DATA TO THE REGISTERS READING DATA FROM THE REGISTERS POWER-ON DEVICE INITIALIZATION MODES OF OPERATION NORMAL MODE POWER-DOWN MODE ALERT (AD7091R-4 AND AD7091R-8 ONLY) BUSY (AD7091R-4 AND AD7091R-8 ONLY) CHANNEL SEQUENCER DAISY CHAIN OUTLINE DIMENSIONS ORDERING GUIDE