AD7767

Rev. C | Page 2 of 2

4

TABLE OF CONTENTS

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

 

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

 

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

 

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

 

Related Devices ................................................................................. 1

 

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

 

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

 

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

 

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

 

Absolute Maximum Ratings............................................................ 8

 

ESD Caution.................................................................................. 8

 

Pin Configuration and Function Descriptions............................. 9

 

Typical Performance Characteristics ........................................... 10

 

Terminology .................................................................................... 14

 

Theory of Operation ...................................................................... 15

 

AD7767/AD7767-1/AD7767-2 Transfer Function................ 15

 

Converter Operation.................................................................. 15

 

Analog Input Structure.............................................................. 16

 

Supply and Reference Voltages ................................................. 16

 

AD7767 Interface ........................................................................... 17

 

Initial Power-Up ......................................................................... 17

 

Reading Data............................................................................... 17

 

Power-Down, Reset, and Synchronization ............................. 17

 

Daisy Chaining ............................................................................... 18

 

Reading Data in Daisy-Chain Mode ....................................... 18

 

Choosing the SCLK Frequency ................................................ 18

 

Daisy-Chain Mode Configuration and Timing Diagrams ... 19

 

Driving the AD7767....................................................................... 20

 

Differential Signal Source ......................................................... 20

 

Single-Ended Signal Source ...................................................... 20

 

Antialiasing ................................................................................. 21

 

Power Dissipation....................................................................... 21

 

VREF+ Input Signal ....................................................................... 22

 

Multiplexing Analog Input Channels ...................................... 22

 

Outline Dimensions ....................................................................... 23

 

Ordering Guide .......................................................................... 23

 

REVISION HISTORY

5/10—Rev. B to Rev. C

Changes

to Pin 8 Description......................................................... 9

Changes to Table 8.......................................................................... 20

3/09—Rev. A to Rev. B

Changes to Table 7.......................................................................... 17

1/09—Rev. 0 to Rev. A

Changes to Features Section............................................................ 1

Change to Intermodulation Distortion (IMD) Parameter and

Integral Nonlinearity Parameter, Table 2 ................................. 3

Changes to Supply and Reference Voltages Section................... 16

Changes to Choosing the SCLK Frequency Section.................. 18

Changes to Figure 24...................................................................... 12

Changes to Driving the AD7767 Section .................................... 20

Changes to Single-Ended Signal Source Section........................ 20

Added Figure 41; Renumbered Sequentially .............................. 20

Change to Figure 42 ....................................................................... 21

Added Table 8; Renumbered Sequentially .................................. 20

Replaced Figure 46 ......................................................................... 22

8/07—Revision 0: Initial Version