AD7739

Rev. 0 | Page 2 of 32

TABLE OF CONTENTS

AD7739—Specifications.................................................................. 3

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

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

Typical Performance Characteristics ............................................. 9

Output Noise and Resolution Specification................................ 10

Chopping Enabled...................................................................... 10

Chopping Disabled..................................................................... 11

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

Register Descriptions ..................................................................... 14

Register Access............................................................................ 15

Communications Register......................................................... 15

I/O Port Register......................................................................... 16

Revision Register ........................................................................ 16

Test Register ................................................................................ 16

ADC Status Register................................................................... 17

Checksum Register..................................................................... 17

ADC Zero-Scale Calibration Register ..................................... 17

ADC Full-Scale Calibration Register....................................... 17

Channel Data Registers ............................................................. 17

Channel Zero-Scale Calibration Registers .............................. 18

Channel Full-Scale Calibration Registers................................ 18

Channel Status Registers ........................................................... 18

Channel Setup Registers ............................................................ 19

Channel Conversion Time Registers ....................................... 20

Mode Register ............................................................................. 20

Digital Interface Description ........................................................ 22

Hardware ..................................................................................... 22

Reset ............................................................................................. 23

Access the AD7739 Registers.................................................... 23

Single Conversion and Reading Data ...................................... 23

Dump Mode................................................................................ 23

Continuous Conversion Mode ................................................. 24

Continuous Read (Continuous Conversion) Mode .............. 25

Circuit Description......................................................................... 26

Analog Inputs.............................................................................. 26

Sigma-Delta ADC....................................................................... 26

Chopping ..................................................................................... 26

Multiplexer, Conversion, and Data Output Timing............... 27

Frequency Response .................................................................. 28

Analog Input’s Extended Voltage Range ................................. 29

Voltage Reference Inputs........................................................... 29

Reference Detect......................................................................... 29

I/O Port........................................................................................ 29

Calibration................................................................................... 30

ADC Zero-Scale Self-Calibration ........................................ 30

ADC Full-Scale Self-Calibration.......................................... 30

Per Channel System Calibration .......................................... 30

Outline Dimensions ....................................................................... 32

ESD Caution................................................................................ 32

Ordering Guide .......................................................................... 32

REVISION HISTORY

Revision 0: Initial Version