AD5620/AD5640/AD5660

Rev. A | Page 2 of 24

TABLE OF CONTENTS

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

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

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

Related Device................................................................................... 1

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

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

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

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

AD5620/AD5640/AD5660-2-3 .................................................. 3

AD5620/AD5640/AD5660-1 ...................................................... 5

Timing Characteristics ................................................................ 7

Absolute Maximum Ratings............................................................ 8

ESD Caution.................................................................................. 8

Pin Configurations and Function Descriptions ........................... 9

Typical Performance Characteristics ........................................... 10

Terminology .................................................................................... 16

Theory of Operation ...................................................................... 17

D/A Section................................................................................. 17

Resistor String ............................................................................. 17

Internal Reference ...................................................................... 17

Output Amplifier........................................................................ 17

Serial Interface ............................................................................ 17

Input Shift Register .................................................................... 18

SYNC Interrupt .......................................................................... 18

Power-On Reset.......................................................................... 19

Power-Down Modes .................................................................. 19

Microprocessor Interfacing....................................................... 19

Applications..................................................................................... 21

Using an REF19x as a Power Supply for the

AD5620/AD5640/AD5660 ....................................................... 21

Bipolar Operation Using the AD5660 ..................................... 21

Using the AD5660 as an Isolated, Programmable,

4 to 20 mA Process Controller ................................................. 21

Using the AD5620/AD5640/AD5660

with a Galvanically Isolated Interface...................................... 22

Power Supply Bypassing and Grounding................................ 22

Outline Dimensions ....................................................................... 23

AD5620 Ordering Guide........................................................... 23

AD5640 Ordering Guide........................................................... 24

AD5660 Ordering Guide........................................................... 24

REVISION HISTORY

9/05—Rev. 0 to Rev. A

Changes to Specifications ................................................................ 5

Changes to Outline Dimensions................................................... 23

7/05—Revision 0: Initial Version