AD5421 Ver la hoja de datos (PDF) - Analog Devices

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AD5421

16-Bit, Serial Input, Loop-Powered, 4 mA to 20 mA DAC

Analog Devices 

AD5421

TABLE OF CONTENTS

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

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

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

Companion Low Power Products .................................................. 1

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

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

Specifications..................................................................................... 4

AC Performance Characteristics ................................................ 9

Timing Characteristics ................................................................ 9

Absolute Maximum Ratings.......................................................... 11

Thermal Resistance .................................................................... 11

ESD Caution................................................................................ 11

Pin Configurations and Function Descriptions ......................... 12

Typical Performance Characteristics ........................................... 14

Terminology .................................................................................... 20

Theory of Operation ...................................................................... 21

Fault Alerts .................................................................................. 21

External Current Setting Resistor ............................................ 22

Loop Current Range Selection.................................................. 22

Connection to Loop Power Supply .......................................... 22

Data Sheet

On-Chip ADC ............................................................................ 23

Voltage Regulator ....................................................................... 23

Loop Current Slew Rate Control.............................................. 23

Power-On Default ...................................................................... 24

HART Communications ........................................................... 24

Serial Interface ................................................................................ 26

Input Shift Register .................................................................... 26

Register Readback ...................................................................... 26

DAC Register .............................................................................. 27

Control Register ......................................................................... 28

Fault Register .............................................................................. 29

Offset Adjust Register ................................................................ 30

Gain Adjust Register .................................................................. 30

Applications Information .............................................................. 32

Determining the Expected Total Error ................................... 32

Thermal and Supply Considerations ....................................... 34

Outline Dimensions ....................................................................... 35

Ordering Guide .......................................................................... 36

Rev. H | Page 2 of 36

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