AD5686R/AD5685R/AD5684R

Data Sheet

Rev. D | Page 2 of 31

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 Configuration and Function Descriptions........................... 10

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

Terminology .................................................................................... 18

Theory of Operation ...................................................................... 20

Digital-to-Analog Converter .................................................... 20

Transfer Function ....................................................................... 20

DAC Architecture....................................................................... 20

Serial Interface ............................................................................ 21

Standalone Operation................................................................ 22

Write and Update Commands.................................................. 22

Daisy-Chain Operation ............................................................. 23

Readback Operation .................................................................. 23

Power-Down Operation............................................................ 24

Load DAC (Hardware LDAC Pin)........................................... 25

LDAC Mask Register ................................................................. 25

Hardware Reset (RESET) .......................................................... 26

Reset Select Pin (RSTSEL) ........................................................ 26

Internal Reference Setup ........................................................... 26

Solder Heat Reflow..................................................................... 26

Thermal Hysteresis .................................................................... 27

Long-Term Temperature Drift ................................................. 27

Applications Information .............................................................. 28

Microprocessor Interfacing....................................................... 28

AD5686R/AD5685R/AD5684R to ADSP-BF531 Interface .... 28

AD5686R/AD5685R/AD5684R to SPORT Interface ............ 28

Layout Guidelines....................................................................... 28

Galvanically Isolated Interface ................................................. 29

Outline Dimensions....................................................................... 30

Ordering Guide .......................................................................... 31

REVISION HISTORY

1/2017—Rev. C to Rev. D

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

Changes to Output Noise Spectral Density Parameter,

Table 3 ................................................................................................ 5

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

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

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

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

Changes to RESET Pin Description, Table 7............................... 10

Changes to Table 8.......................................................................... 21

Changes to Readback Operation Section.................................... 23

Changes to Hardware Reset (RESET) Section............................ 26

Added Long-Term Temperature Drift Section and

Figure 58 .......................................................................................... 27

5/2014—Rev. B to Rev. C.

Deleted Long-Term Stability/Drift Parameter, Table 1 ................4

Deleted Figure 11; Renumbered Sequentially ............................ 11

Deleted Long-Term Temperature Drift Section and Figure 58;

Renumbered Sequentially ............................................................. 26

6/2013—Rev. A to Rev. B

Changes to Pin GAIN and Pin RSTSEL Descriptions; Table 6 ....10

9/2012—Rev. 0 to Rev. A

Changes to Table 1.............................................................................1

Changes to Figure 13...................................................................... 11

Changes to Figure 36...................................................................... 15

4/2012—Revision 0: Initial Version