Datasheet

AD5749 Data Sheet
Rev. B | Page 2 of 28
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Timing Characteristics ................................................................ 5
Absolute Maximum Ratings ............................................................ 7
ESD Caution .................................................................................. 7
Pin Configuration and Function Descriptions ............................. 8
Typical Performance Characteristics ........................................... 10
Terminolog y .................................................................................... 15
Theory of Operation ...................................................................... 16
Software Mode ............................................................................ 16
Current Output Architecture .................................................... 18
Driving Inductive Loads ............................................................ 18
Power-On State of the AD5749 ................................................ 18
Default Registers at Power-On ................................................. 18
Reset Function ............................................................................ 18
OUTEN ........................................................................................ 18
Software Control ........................................................................ 18
Hardware Control ...................................................................... 21
Transfer Function ....................................................................... 21
Detailed Description of Features .................................................. 22
Output Fault Alert—Software Mode ....................................... 22
Output Fault Alert—Hardware Mode ..................................... 22
Asynchronous Clear (CLEAR) ................................................. 22
External Current Setting Resistor ............................................ 22
Programmable Overrange Modes ............................................ 22
Packet Error Checking ............................................................... 23
Applications Information .............................................................. 24
Transient Voltage Protection .................................................... 24
Thermal Considerations ............................................................ 24
Layout Guidelines....................................................................... 25
Galvanically Isolated Interface ................................................. 25
Microprocessor Interfacing ....................................................... 25
Outline Dimensions ....................................................................... 26
Ordering Guide .......................................................................... 26
REVISION HISTORY
10/13—Rev. A to Rev. B
Changes to Table 4 ............................................................................ 7
Changes to Thermal Considerations Section and Table 12 ...... 24
Updated Outline Dimensions ....................................................... 26
7/12—Rev. 0 to Rev. A
Changes to Figure 3 .......................................................................... 6
Changes to Status Bit Read Operation Section ........................... 21
Updated Outline Dimensions ....................................................... 26
7/10—Revision 0: Initial Version