link to page 1 link to page 1 link to page 1 link to page 2 link to page 3 link to page 4 link to page 7 link to page 9 link to page 9 link to page 10 link to page 12 link to page 12 link to page 16 link to page 21 link to page 22 link to page 22 link to page 24 link to page 24 link to page 24 link to page 25 link to page 25 link to page 25 link to page 25 link to page 27 link to page 27 link to page 28 link to page 28 link to page 28 link to page 28 link to page 28 link to page 29 link to page 29 link to page 30 link to page 30 link to page 30 link to page 30 link to page 31 link to page 31 link to page 32 link to page 32 AD5748Data SheetTABLE OF CONTENTS Features .. 1 Reset Function .. 25 Applications ... 1 OUTEN .. 25 General Description ... 1 Software Control .. 25 Revision History ... 2 Hardware Control .. 27 Functional Block Diagram .. 3 Transfer Function ... 27 Specifications ... 4 Detailed Description of Features .. 28 Timing Characteristics .. 7 Output Fault Alert—Software Mode ... 28 Absolute Maximum Ratings .. 9 Output Fault Alert—Hardware Mode ... 28 ESD Caution .. 9 Voltage Output Short-Circuit Protection .. 28 Pin Configuration and Function Descriptions ... 10 Asynchronous Clear (CLEAR) ... 28 Typical Performance Characteristics ... 12 Current Setting Resistor .. 29 Voltage Output .. 12 Packet Error Checking ... 29 Current Output ... 16 Applications Information .. 30 Terminology .. 21 Transient Voltage Protection .. 30 Theory of Operation .. 22 Thermal Considerations .. 30 Software Mode .. 22 Layout Guidelines... 30 Current Output Architecture .. 24 Galvanically Isolated Interface ... 31 Driving Inductive Loads .. 24 Microprocessor Interfacing ... 31 Power-On State of the AD5748 .. 24 Outline Dimensions ... 32 Default Registers at Power-On ... 25 Ordering Guide .. 32 REVISION HISTORY9/14—Rev. A to Rev. B Change to Table 4 ... 9 Change to Figure 4 ... 10 Changes to Figure 44 .. 19 Changes to Asynchronous Clear (CLEAR) Section ... 28 Changes to Thermal Considerations Section ... 30 Updated Outline Dimensions ... 32 Changes to Ordering Guide .. 32 5/10—Rev. 0 to Rev. A Changes to Table 2, Power Requirements ... 6 3/10—Revision 0: Initial Version Rev. B | Page 2 of 32 Document Outline Features Applications General Description Table of Contents Revision History Functional Block Diagram Specifications Timing Characteristics Timing Diagrams Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Voltage Output Current Output Terminology Theory of Operation Software Mode Current Output Architecture Driving Inductive Loads Voltage Output Amplifier Driving Large Capacitive Loads Power-On State of the AD5748 Default Registers at Power-On Reset Function OUTEN Software Control Input Shift Register Readback Operation Hardware Control Transfer Function Detailed Description of Features Output Fault Alert—Software Mode Output Fault Alert—Hardware Mode Voltage Output Short-Circuit Protection Asynchronous Clear (CLEAR) Current Setting Resistor Packet Error Checking Applications Information Transient Voltage Protection Thermal Considerations Layout Guidelines Galvanically Isolated Interface Microprocessor Interfacing Outline Dimensions Ordering Guide