Datasheet

AD5412/AD5422 Data Sheet
Rev. I | Page 2 of 44
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Companion Products ....................................................................... 1
Revision History ............................................................................... 3
Functional Block Diagram .............................................................. 4
Specifications ..................................................................................... 5
AC Performance Characteristics ................................................ 8
Timing Characteristics ................................................................ 9
Absolute Maximum Ratings .......................................................... 11
ESD Caution ................................................................................ 11
Pin Configurations and Function Descriptions ......................... 12
Typical Performance Characteristics ........................................... 14
General ......................................................................................... 14
Voltage Output ............................................................................ 16
Current Output ........................................................................... 21
Terminology .................................................................................... 25
Theory of Operation ...................................................................... 27
Architecture ................................................................................. 27
Serial Interface ............................................................................ 28
Power-On State ........................................................................... 29
Data Register ............................................................................... 31
Control Register .......................................................................... 31
Reset Register .............................................................................. 32
Status Register ............................................................................. 32
AD5412/AD5422 Features ............................................................ 33
Fault Alert .................................................................................... 33
Voltage Output Short Circuit Protection ................................ 33
Voltage Output Overrange ........................................................ 33
Voltage Output Force-Sense ..................................................... 33
Asynchronous Clear (CLEAR) ................................................. 33
Internal Reference ...................................................................... 33
External Current Setting Resistor ............................................ 33
Digital Power Supply .................................................................. 34
External Boost Function ........................................................... 34
External Compensation Capacitor ........................................... 34
HART Communication ............................................................. 34
Digital Slew Rate Control .......................................................... 34
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Filtering Capacitors (LFCSP Package) ............................. 35
Applications Information .............................................................. 37
Voltage and Current Output Ranges on the Same Terminal 37
Driving Inductive Loads ............................................................ 37
Transient Voltage Protection .................................................... 37
Galvanically Isolated Interface ................................................. 37
Microprocessor Interfacing ....................................................... 37
Layout Guidelines....................................................................... 38
Thermal and Supply Considerations ....................................... 38
Industrial Analog Output Module ........................................... 39
Industrial HART Capable Analog Output Application ........ 39
Outline Dimensions ....................................................................... 41
Ordering Guide .......................................................................... 42