AD5674/AD5674R/AD5679/AD5679R

Data Sheet

Rev. B | Page 2 of 32

TABLE OF CONTENTS

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

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

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

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

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

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

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

AD5674/AD5674R Specifications.............................................. 3

AD5679/AD5679R Specifications.............................................. 5

AC Characteristics........................................................................ 7

Timing Characteristics ................................................................ 7

Daisy-Chain and Readback Timing Characteristics................ 8

Absolute Maximum Ratings.......................................................... 10

Thermal Resistance .................................................................... 10

ESD Caution................................................................................ 10

Pin Configuration and Function Descriptions........................... 11

Typical Performance Characteristics ........................................... 12

Terminology .................................................................................... 21

Theory of Operation ...................................................................... 23

DAC.............................................................................................. 23

Transfer Function ....................................................................... 23

DAC Architecture....................................................................... 23

Serial Interface ............................................................................ 23

Standalone Operation................................................................ 25

Write and Update Commands.................................................. 25

Daisy-Chain Operation ............................................................. 25

Readback Operation .................................................................. 25

Power-Down Operation ............................................................ 26

Load DAC (Hardware LDAC Pin)........................................... 27

LDAC Mask Register ................................................................. 27

Hardware Reset (RESET) .......................................................... 28

Power-On Reset Internal Circuit.............................................. 28

Software Reset............................................................................. 28

Internal Reference Setup ........................................................... 28

Solder Heat Reflow..................................................................... 28

Long-Term Temperature Drift ................................................. 29

Thermal Hysteresis .................................................................... 29

Applications Information .............................................................. 30

Power Supply Recommendations............................................. 30

Microprocessor Interfacing....................................................... 30

AD5674/AD5674R/AD5679/AD5679R to ADSP-BF531

Interface....................................................................................... 30

AD5674/AD5674R/AD5679/AD5679R to SPORT Interface30

Layout Guidelines....................................................................... 30

Galvanically Isolated Interface ................................................. 31

Outline Dimensions....................................................................... 32

Ordering Guide .......................................................................... 32

REVISION HISTORY

12/2019—Rev. A to Rev. B

Changes to General Description .................................................... 1

Table 2 and Endnote 1...................................................................... 4

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

Changes to Table 9.......................................................................... 11

Changes to Figure 9........................................................................ 12

Changes to Figure 13 to Figure 18................................................ 13

Changes to Figure 19 to Figure 24................................................ 14

Changes to Figure 25 to Figure 30................................................ 15

Changes to Figure 31 and Figure 32............................................. 16

Changes to Hardware Reset (RESET) Section and Figure 52 and

Figure 53, Moved Table 19............................................................. 19

Added Figure 60 and Changes to Internal Reference Section.. 24

Instantaneous DAC Updating (LDAC Held Low) and Deferred

DAC Updating (LDAC is Pulsed Low) Sections ........................ 28

Hardware Reset (RESET) Section ................................................ 29

Changes to Ordering Guide .......................................................... 32

11/2019—Rev. 0 to Rev. A

Added AD5674, AD5674R, and AD5679................... Throughout

Changes to Functional Block Diagram, Table 1, General

Description Section, and Product Highlights Section .................1

Changes to Table 2.............................................................................4

Added AD5679/AD5679R Specifications Section and Table 2;

Renumbered Sequentially ................................................................6

Changes to Thermal Resistance Section ..................................... 11

Changes to Figure 7 to Figure 12.................................................. 12

Changes to Figure 13 to Figure 18 ............................................... 13

Changes to Figure 19 to Figure 24 ............................................... 14

Changes to Figure 25 to Figure 30 ............................................... 15

Changes to Figure 31 to Figure 36 ............................................... 16

Changes to Figure 37 to Figure 42 ............................................... 17

Changes to Figure 60...................................................................... 25

Added Long-Term Temperature Drift Section and Figure 64;

Renumbered Sequentially ............................................................. 28

Changes to Figure 67 and Figure 68 ............................................ 30

Changes to Ordering Guide.......................................................... 32

8/2019—Revision 0: Initial Version