Datasheet

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