AD5749

Rev. 0 | 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

 

Terminology .................................................................................... 15

 

Theory of Operation ...................................................................... 16

 

Software Mode ............................................................................ 16

 

Currrent 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

7/10—Revision 0: Initial Version