AD74413RBCPZ datasheet(2/70 Pages) AD

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AD74413R

Data Sheet

Rev. 0 | Page 2 of 70

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

General Description ......................................................................... 1

Companion Products ....................................................................... 1

Product Highlights ........................................................................... 1

Revision History ............................................................................... 3

Functional Block Diagram .............................................................. 4

Specifications..................................................................................... 5

Voltage Output.............................................................................. 5

Current Output ............................................................................. 6

Voltage Input ................................................................................. 7

Current Input Externally Powered and Current Input

Externally Powered with HART ................................................. 8

Current Input Loop Powered...................................................... 9

Resistance Measurement ............................................................. 9

Digital Input Logic ..................................................................... 10

Digital Input Loop Powered...................................................... 11

ADC Specifications .................................................................... 11

General Specifications ............................................................... 13

Timing Characteristics .............................................................. 15

Absolute Maximum Ratings.......................................................... 17

Thermal Resistance .................................................................... 17

ESD Caution................................................................................ 17

Pin Configuration and Function Descriptions........................... 18

Typical Performance Characteristics ........................................... 21

Voltage Output............................................................................ 21

Current Output ........................................................................... 23

Digital Input ................................................................................ 25

Resistance Measurement ........................................................... 26

Reference ..................................................................................... 27

ADC ............................................................................................. 28

Supplies ........................................................................................ 29

Theory of Operation ...................................................................... 30

Robust Architecture ................................................................... 30

Serial Interface ............................................................................ 30

DAC Architecture....................................................................... 30

ADC Overview ........................................................................... 31

Reference ..................................................................................... 31

Power-On State of the AD74413R............................................ 31

Device Functions ........................................................................ 31

Digital Input, Loop Powered Mode ......................................... 42

Getting Started............................................................................ 43

Using Channel Functions.......................................................... 43

ADC Functionality..................................................................... 44

Diagnostics.................................................................................. 48

DACs ............................................................................................ 49

Driving Inductive Loads............................................................ 50

Reset Function ............................................................................ 50

Thermal Alert and Thermal Reset ........................................... 50

Faults and Alerts......................................................................... 50

Power Supply Monitors ............................................................. 50

GPO_x Pins................................................................................. 51

SPI Interface and Diagnostics................................................... 51

Board Design and Layout Considerations .................................. 54

Applications Information .............................................................. 55

NOP Register .............................................................................. 57

Function Setup Register per Channel...................................... 57

ADC Configuration Register per Channel ............................. 57

Digital Input Configuration Register per Channel................ 58

GPO Parallel Data Register....................................................... 59

GPO Configuration Register per Channel ............................. 59

Output Configuration Register per Channel.......................... 60

DAC Code Register per Channel ............................................. 60

DAC Clear Code Register per Channel................................... 60

DAC Active Code Register per Channel ................................. 61

Digital Input Threshold Register.............................................. 61

ADC Conversion Control Register.......................................... 61

Diagnostics Select Register ....................................................... 62

Digital Output Level Register ................................................... 63

ADC Conversion Results Register per Channel .................... 64

Diagnostic Results Registers per Diagnostic Channel .......... 64

Alert Status Register................................................................... 64

Live Status Register .................................................................... 66

Alert Mask Register.................................................................... 67

Debounced DIN Count Register per Channel ....................... 67

Readback Select Register ........................................................... 68

Thermal Reset Enable Register................................................. 68

Command Register .................................................................... 68

Scratch or Spare Register........................................................... 69

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