AD74115BCPZ datasheet(2/103 Pages) AD

2 / 103 page

Data Sheet

AD74115

TABLE OF CONTENTS

analog.com

Rev. 0 | 2 of 103

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

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

Functional Block Diagram......................................1

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

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

Specifications........................................................ 3

Voltage Output....................................................3

Current Output (IOUT)......................................... 4

Voltage Input...................................................... 5

Current Input Externally Powered...................... 6

Current Input Loop Powered.............................. 6

Resistance 2-Wire Measurement....................... 7

3-Wire RTD Measurement ................................ 8

4-Wire RTD Measurement ................................ 8

Digital Input Logic...............................................9

Digital Input Loop Powered.............................. 10

Digital Outputs (Sourcing and Sinking).............11

ADC Specifications...........................................13

General Specifications..................................... 14

Timing Characteristics......................................17

Absolute Maximum Ratings.................................19

Thermal Resistance......................................... 19

Electrostatic Discharge (ESD) Ratings.............19

ESD Caution.....................................................19

Pin Configuration and Function Descriptions...... 20

Typical Performance Characteristics................... 22

Voltage Output..................................................22

Current Output (IOUT)....................................... 23

Resistance Measurement.................................24

Reference.........................................................25

ADC..................................................................26

Digital Output....................................................27

Others...............................................................28

Terminology......................................................... 29

ADC Offset Error.............................................. 29

ADC Gain Error................................................ 29

DAC Offset Error.............................................. 29

DAC Bipolar Zero Error.................................... 29

DAC Gain Error................................................ 29

Total Unadjusted Error (TUE)........................... 29

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

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

Power Supplies and Reference........................30

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

Getting Started................................................. 52

ADC Functionality.............................................54

DAC Functionality.............................................61

Reset Function................................................. 63

Faults and Alerts.............................................. 63

FET Leakage Compensation ...........................63

GPIO_x Pins.....................................................65

SPI....................................................................65

Applications Information...................................... 69

Power and Isolation .........................................69

System Level Block Diagram........................... 70

External Components.......................................72

Board Design and Layout Considerations........73

Software Configurable Input and Output

Registers........................................................ 75

Outline Dimensions........................................... 103

Ordering Guide...............................................103

Evaluation Boards.......................................... 103

REVISION HISTORY

1/2023—Revision 0: Initial Version

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