AD5689/AD5687

Data Sheet

Rev. B | Page 2 of 24

TABLE OF CONTENTS

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

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

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

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

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

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

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

AC Characteristics........................................................................ 4

Timing Characteristics ................................................................ 5

Daisy-Chain and Readback Timing Characteristics................ 6

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

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

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

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

Terminology .................................................................................... 15

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

Digital-to-Analog Converters (DACs) .................................... 17

Transfer Function ....................................................................... 17

DAC Architecture....................................................................... 17

Serial Interface ............................................................................ 18

Standalone Operation................................................................ 19

Write and Update Commands.................................................. 19

Daisy-Chain Operation ............................................................. 19

Readback Operation .................................................................. 20

Power-Down Operation............................................................ 20

Load DAC (Hardware LDAC Pin)........................................... 21

LDAC Mask Register ................................................................. 21

Hardware Reset (RESET) .......................................................... 22

Reset Select Pin (RSTSEL) ........................................................ 22

Applications Information .............................................................. 23

Microprocessor Interfacing....................................................... 23

AD5689/AD5687 to ADSP-BF531 Interface .......................... 23

AD5689/AD5687 to SPORT Interface..................................... 23

Layout Guidelines....................................................................... 23

Galvanically Isolated Interface ................................................. 23

Outline Dimensions....................................................................... 24

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

REVISION HISTORY

7/2017—Rev. A to Rev. B

Changes to Features Section and Table 1 ...................................... 1

Changes to Table 2............................................................................ 3

Changes to Table 3 Summary.......................................................... 4

Changes to Table 4 and Figure 2..................................................... 5

Changes to Table 5 and Figure 4..................................................... 6

Changes to Figure 5.......................................................................... 7

Changes to Table 6............................................................................ 8

Table 7 ................................................................................................ 9

Changes to Figure 10 and Figure 13............................................. 10

Changes to Figure 14 and Figure 19............................................. 11

Changes to Figure 20 and Figure 25............................................. 12

Changes to Figure 32...................................................................... 14

Changes to Table 9.......................................................................... 18

Changes to Readback Operation Section.................................... 20

Changes to Hardware Reset (RESET) Section............................ 22

1/2016—Rev. 0 to Rev. A

Change to Table 14 ......................................................................... 21

2/2013—Revision 0: Initial Version