
AD5620/AD5640/AD5660
TABLE OF CONTENTS
Features..............................................................................................1
Rev. A | Page 2 of 24
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