AD5686/AD5684

Data Sheet

Rev. A | Page 2 of 28

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

6/13—Rev. 0 to Rev. A

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

7/12—Revision 0: Initial Version