AD7763

Rev. 0 | Page 2 of 32

TABLE OF CONTENTS

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

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

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

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

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

Timing Specifications....................................................................... 5

Timing Diagrams.......................................................................... 6

Absolute Maximum Ratings............................................................ 7

ESD Caution.................................................................................. 7

Pin Configuration and Function Descriptions............................. 8

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

Typical Performance Characteristics ........................................... 11

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

AD7763 Interface............................................................................ 15

Reading Data Using the SPI Interface ..................................... 15

Synchronization.......................................................................... 15

Sharing the Serial Bus ................................................................ 15

Writing to the AD7763 .............................................................. 16

Reading Status and Other Registers......................................... 17

Reading Data Using the I2S Interface....................................... 18

Clocking the AD7763..................................................................... 19

Example 1 .................................................................................... 19

Example 2 .................................................................................... 19

Driving the AD7763....................................................................... 20

Using the AD7763 ...................................................................... 21

Bias Resistor Selection ............................................................... 21

Decoupling and Layout Recommendations................................ 22

Supply Decoupling ..................................................................... 23

Additional Decoupling .............................................................. 23

Reference Voltage Filtering ....................................................... 23

Differential Amplifier Components ........................................ 23

Exposed Paddle........................................................................... 23

Layout Considerations............................................................... 23

Programmable FIR Filter............................................................... 24

Downloading a User-Defined Filter ............................................ 25

Example Filter Download ......................................................... 26

Registers........................................................................................... 27

Control Register 1—Address 0x001......................................... 27

Control Register 2—Address 0x002......................................... 27

Status Register (Read Only) ...................................................... 28

Offset Register—Address 0x003............................................... 28

Gain Register—Address 0x004 ................................................. 28

Overrange Register—Address 0x005....................................... 28

Outline Dimensions ....................................................................... 29

Ordering Guide .......................................................................... 29

REVISION HISTORY

10/05—Revision 0: Initial Version