AD7846

Rev. G | Page 2 of 24

TABLE OF CONTENTS

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

 

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

 

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

 

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

 

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

 

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

 

AC Performance Characteristics ................................................ 4

 

Timing Characteristics ................................................................ 5

 

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

 

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

 

Pin Configurations and Function Descriptions ........................... 7

 

Typical Performance Characteristics ............................................. 8

 

Terminology .................................................................................... 10

 

Circuit Description......................................................................... 11

 

Digital Section............................................................................. 11

 

Digital-to-Analog Conversion.................................................. 11

 

Output Stage................................................................................ 12

 

Unipolar Binary Operation ........................................................... 13

 

Bipolar Operation........................................................................... 14

 

Multiplying Operation............................................................... 14

 

Position Measurement Application.............................................. 15

 

Microprocessor Interfacing........................................................... 16

 

AD7846-to-8086 Interface ........................................................ 16

 

AD7846-to-MC68000 Interface ............................................... 16

 

Digital Feedthrough ....................................................................... 17

 

Application Hints ........................................................................... 18

 

Noise ............................................................................................ 18

 

Grounding ................................................................................... 18

 

Printed Circuit Board Layout ................................................... 18

 

Outline Dimensions ....................................................................... 20

 

Ordering Guide .......................................................................... 22

 

REVISION HISTORY

4/10—Rev. F to Rev. G

Change to Figure 1 ........................................................................... 1

12/09—Rev. E to Rev. F

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

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

Deleted Other Output Voltage Ranges Section ............................ 9

Deleted Figure 20 and Table 5; Renumbered Sequentially ......... 9

Deleted Test Application Section and Figure 21 ........................ 10

Deleted Figure 29 to Figure 31...................................................... 14

Changes to Printed Circuit Board Layout Section..................... 18

Updated Outline Dimensions ....................................................... 20

Changes to Ordering Guide .......................................................... 22