AD7699

Data Sheet

Rev. F | Page 2 of 32

TABLE OF CONTENTS

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

 

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

 

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

 

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

 

Revision History ............................................................................... 3

 

Specifications..................................................................................... 4

 

Timing Specifications....................................................................... 6

 

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

 

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

 

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

 

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

 

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

 

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

 

Overview...................................................................................... 15

 

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

 

Transfer Functions...................................................................... 16

 

Typical Connection Diagrams.................................................. 17

 

Analog Inputs.............................................................................. 18

 

Driver Amplifier Choice............................................................ 20

 

Voltage Reference Output/Input .............................................. 20

 

Power Supply............................................................................... 21

 

Supplying the ADC from the Reference.................................. 22

 

Digital Interface .............................................................................. 23

 

Reading/Writing During Conversion, Fast Hosts.................. 23

 

Reading/Writing During Acquisition, Any Speed Hosts...... 23

 

Reading/Writing Spanning Conversion, Any Speed Host.... 23

 

Configuration Register, CFG .................................................... 23

 

General Timing Without a Busy Indicator ............................. 25

 

General Timing With a Busy Indicator ................................... 26

 

Read/Write Spanning Conversion Without a Busy

Indicator ...................................................................................... 27

 

Read/Write Spanning Conversion with a Busy Indicator..... 28

 

Channel Sequencer .................................................................... 29

 

Application Hints ........................................................................... 30

 

Layout .......................................................................................... 30

 

Evaluating AD7699 Performance............................................. 30

 

Outline Dimensions ....................................................................... 31

 

Ordering Guide .......................................................................... 31