AD7780

Rev. A | Page 2 of 16

TABLE OF CONTENTS

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

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

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

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

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

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

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

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

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

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

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

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

Output Noise and Resolution........................................................ 10

Theory of Operation ...................................................................... 11

Filter, Data Rate, and Settling Time ......................................... 11

Gain .............................................................................................. 12

Power-Down/Reset (PDRST) ................................................... 12

Analog Input Channel ............................................................... 12

Bipolar Configuration................................................................ 12

Data Output Coding .................................................................. 12

Reference ..................................................................................... 12

Bridge Power-Down Switch...................................................... 13

Digital Interface.......................................................................... 13

Applications Information .............................................................. 14

Weigh Scales................................................................................ 14

Performance in a Weigh Scale System..................................... 14

EMI Recommendations............................................................. 14

Grounding and Layout .............................................................. 15

Outline Dimensions ....................................................................... 16

Ordering Guide .......................................................................... 16

REVISION HISTORY

9/09—Rev. 0 to Rev. A

Changes to Specifications Table...................................................... 3

4/09—Revision 0: Initial Version