AD5737 查看數據表（PDF） - Analog Devices

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AD5737

Quad-Channel, 12-Bit, Serial Input, 4 mA to 20 mA Output DAC with Dynamic Power Control and HART Connectivity

Analog Devices 

AD5737

Data Sheet

TABLE OF CONTENTS

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

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

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

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

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

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

Revision History ............................................................................... 2

Detailed Functional Block Diagram .............................................. 3

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

AC Performance Characteristics ................................................ 6

Timing Characteristics ................................................................ 6

Absolute Maximum Ratings............................................................ 9

Thermal Resistance ...................................................................... 9

ESD Caution.................................................................................. 9

Pin Configuration and Function Descriptions........................... 10

Typical Performance Characteristics ........................................... 13

Current Outputs ......................................................................... 13

DC-to-DC Converter................................................................. 17

Reference ..................................................................................... 18

General......................................................................................... 19

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

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

DAC Architecture....................................................................... 21

Power-On State of the AD5737 ................................................ 21

Serial Interface ............................................................................ 21

Transfer Function ....................................................................... 22

Registers ........................................................................................... 23

Enabling the Output................................................................... 24

Reprogramming the Output Range ......................................... 24

Data Registers ............................................................................. 25

Control Registers ........................................................................ 27

REVISION HISTORY

5/12—Rev. A to Rev. B

Changes to Companion Products Section .................................... 1

Change to Table 6 ........................................................................... 12

Added Industrial HART Capable Analog Output Application

Section and Figure 65, Renumbered Sequentially ..................... 42

Updated Outline Dimensions ....................................................... 43

Readback Operation .................................................................. 30

Device Features ............................................................................... 32

Fault Output ................................................................................ 32

Digital Offset and Gain Control............................................... 32

Status Readback During a Write .............................................. 32

Asynchronous Clear................................................................... 32

Packet Error Checking............................................................... 33

Watchdog Timer......................................................................... 33

Alert Output................................................................................ 33

Internal Reference ...................................................................... 33

External Current Setting Resistor ............................................ 33

HART Connectivity ................................................................... 34

Digital Slew Rate Control.......................................................... 34

Dynamic Power Control............................................................ 35

DC-to-DC Converters ............................................................... 35

AICC Supply Requirements—Static .......................................... 36

AICC Supply Requirements—Slewing ...................................... 37

External PMOS Mode................................................................ 38

Applications Information .............................................................. 39

Current Output Mode with Internal RSET................................ 39

Precision Voltage Reference Selection..................................... 39

Driving Inductive Loads............................................................ 39

Transient Voltage Protection .................................................... 40

Microprocessor Interfacing....................................................... 40

Layout Guidelines....................................................................... 40

Galvanically Isolated Interface ................................................. 41

Industrial HART Capable Analog Output Application ........ 42

Outline Dimensions ....................................................................... 43

Ordering Guide .......................................................................... 43

Changes to Readback Operation Section and Readback

Example Section ............................................................................. 30

7/11—Revision 0: Initial Version

11/11—Rev. 0 to Rev. A

Change to Accuracy, External RSET Parameter in Table 1............ 4

Changes to Power-On State of the AD5737 Section .................. 21

Rev. B | Page 2 of 44

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