AD5686/AD5684

Data Sheet

Rev. C | Page 2 of 27

TABLE OF CONTENTS

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

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

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

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

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

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

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

AC Characteristics........................................................................ 5

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

Daisy-Chain and Readback Timing Characteristics................ 7

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

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

Pin Configurations and Function Descriptions ......................... 10

Typical Performance Characteristics ........................................... 11

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

Theory of Operation ...................................................................... 18

Digital-to-Analog Converter .................................................... 18

Transfer Function ....................................................................... 18

DAC Architecture....................................................................... 18

Serial Interface ............................................................................ 19

Standalone Operation................................................................ 20

Write and Update Commands.................................................. 20

Daisy-Chain Operation ............................................................. 20

Readback Operation .................................................................. 21

Power-Down Operation ............................................................ 21

Load DAC (Hardware LDAC Pin)........................................... 22

LDAC Mask Register ................................................................. 22

Hardware Reset (RESET) .......................................................... 23

Reset Select Pin (RSTSEL) ........................................................ 23

Applications Information .............................................................. 24

Microprocessor Interfacing....................................................... 24

AD5686/AD5684 to ADSP-BF531 Interface .......................... 24

AD5686/AD5684 to SPORT Interface .................................... 24

Layout Guidelines....................................................................... 24

Galvanically Isolated Interface ................................................. 25

Outline Dimensions....................................................................... 26

Ordering Guide .......................................................................... 27

REVISION HISTORY

6/2017—Rev. B to Rev. C

Changes to Features Section 1 ........................................................ 1

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

Changes to Table 3............................................................................ 5

Changes to Table 4............................................................................ 6

Changes to Table 5 and Figure 4..................................................... 7

Changes to Figure 5.......................................................................... 8

Changes to Table 6............................................................................ 9

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

Changes to Figure 12 and Figure 13............................................. 11

Changes to Figure 14 to Figure 19................................................ 12

Changes to Figure 20, Figure 22, and Figure 25 ......................... 13

Changes to Figure 32...................................................................... 15

Changes to Table 8.......................................................................... 19

Changes to Readback Operation Section.................................... 21

Changes to Hardware Reset (RESET) Section............................ 23

Changes to Ordering Guide .......................................................... 27

3/2015—Rev. A to Rev. B

Changes to Table 4 and Figure 2......................................................6

Inserted Note 2 to Ordering Guide.............................................. 27

6/2013—Rev. 0 to Rev. A

Changes to Pin GAIN and Pin RSTSEL Descriptions; Table 7.. 10

7/2012—Revision 0: Initial Version