DAC8420

Rev. B | Page 2 of 24

TABLE OF CONTENTS

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

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

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

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

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

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

Electrical Characteristics............................................................. 3

Absolute Maximum Ratings............................................................ 6

Thermal Resistance ...................................................................... 6

ESD Caution.................................................................................. 6

Pin Configurations and Function Descriptions ........................... 8

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

Theory of Operation ...................................................................... 14

Introduction ................................................................................ 14

Digital Interface Operation ....................................................... 14

Correct Operation of CS and CLK........................................... 14

Using CLR and CLSEL .............................................................. 14

Programming the Analog Outputs .......................................... 14

VREFHI Input Requirements................................................... 16

Power-Up Sequence ................................................................... 16

Applications..................................................................................... 17

Power Supply Bypassing and Grounding................................ 17

Analog Outputs .......................................................................... 17

Reference Configuration ........................................................... 18

Isolated Digital Interface ........................................................... 19

Dual Window Comparator ....................................................... 20

MC68HC11 Microcontroller Interfacing................................ 20

DAC8420 to M68HC11 Interface Assembly Program .......... 21

Outline Dimensions ....................................................................... 22

Ordering Guide .......................................................................... 23

REVISION HISTORY

5/07—Rev. A to Rev. B

Updated Format..................................................................Universal

Changes to Endnote 3 ...................................................................... 4

Changes to Table 3............................................................................ 6

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

Updated Outline Dimensions ....................................................... 22

Changes to Ordering Guide .......................................................... 23

9/03—Rev. 0 to Rev. A

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

Deleted Wafer Test Limits table ...................................................... 4

Deleted Dice Characteristics........................................................... 4

Updated Ordering Guide................................................................. 4

Added Power-Up Sequence section ............................................. 12

Updated Outline Dimensions ....................................................... 17