AD7781CRUZ Analog Devices Inc, AD7781CRUZ Datasheet - Page 2

• Manufacturer Part Number: AD7781CRUZ
• Description: 1CHANNEL L/POWER 20-BIT SD GAIN 128 IC
• Manufacturer: Analog Devices Inc

Specifications of AD7781CRUZ

• Design Resources: Weigh Scale Design Using AD7781 with Internal PGA (CN0108)
• Number Of Bits: 20
• Data Interface: Serial, SPI™
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP (0.173", 4.40mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD7781
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 6
Pin Configurations and Function Descriptions ........................... 7
Typical Performance Characteristics ............................................. 8
Output Noise and Resolution........................................................ 10
Theory of Operation ...................................................................... 11
REVISION HISTORY
5/09—Revision 0: Initial Version
Timing Characteristics ................................................................ 5
Thermal Resistance ...................................................................... 6
ESD Caution .................................................................................. 6
Filter, Data Rate, and Settling Time ......................................... 11
Rev. 0 | Page 2 of 16
Applications Information .............................................................. 14
Outline Dimensions ....................................................................... 16
Gain .............................................................................................. 11
Power-Down/Reset ( PDRST ) ................................................... 12
Analog Input Channel ............................................................... 12
Bipolar Configuration ................................................................ 12
Data Output Coding .................................................................. 12
Reference ..................................................................................... 12
Bridge Power-Down Switch ...................................................... 12
Digital Interface .......................................................................... 13
Weigh Scales ................................................................................ 14
AD7781 Performance in a Weigh Scale System ......................... 14
EMI Recommendations ............................................................. 14
Grounding and Layout .............................................................. 15
Ordering Guide .......................................................................... 16