AD4697 datasheet(2/107 Pages) AD

2 / 107 page

Data Sheet

AD4697/AD4698

TABLE OF CONTENTS

analog.com

Rev. 0 | 2 of 107

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

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

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

Functional Block Diagram......................................3

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

Timing Specifications......................................... 9

Absolute Maximum Ratings................................. 11

Thermal Resistance..........................................11

Electrostatic Discharge (ESD) Ratings.............11

ESD Caution.....................................................11

Pin Configuration and Function Descriptions...... 12

Typical Performance Characteristics................... 15

Terminology......................................................... 25

Theory of Operation.............................................26

Overview.......................................................... 26

Converter Operation.........................................26

Transfer Function............................................. 28

Analog Inputs................................................... 30

Input Overvoltage Protection Clamps...............33

Temperature Sensor.........................................34

Voltage Reference Input...................................34

Power Supplies................................................ 35

Oversampling and Decimation......................... 36

Offset and Gain Correction...............................37

Threshold Detection and Alert Indicators......... 37

Busy Indicator...................................................40

Channel Sequencing Modes............................ 40

Digital Interface....................................................45

Conversion Mode............................................. 52

Autocycle Mode................................................62

General-Purpose Pins......................................64

Device Reset....................................................65

Applications Information...................................... 69

Analog Front-End Design.................................70

Analog Input Overvoltage Protection................73

Reference Circuitry Design.............................. 73

Optimizing Reference Buffer Startup................75

Converting Between Codes and Volts..............76

Oversampling for Noise Reduction...................76

Digital Interface Operation................................76

Device Configuration Recommendations......... 84

Effective Channel Sample Rate....................... 85

Layout Guidelines.............................................88

Evaluating AD4697/AD4698 Performance....... 88

Outline Dimensions........................................... 107

Ordering Guide ..............................................107

REVISION HISTORY

4/2022—Revision 0: Initial Version

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