AD7790

Data Sheet

Rev. A | Page 2 of 20

TABLE OF CONTENTS

AD7790—Specifications.................................................................. 3

 

Timing Characteristics, ................................................................... 5

 

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

 

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

 

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

 

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

 

On-Chip Registers .......................................................................... 10

 

Communications Register (RS1, RS0 = 0, 0) .......................... 10

 

Status Register (RS1, RS0 = 0, 0; Power-on/Reset = 0x88) ... 11

 

Mode Register (RS1, RS0 = 0, 1; Power-on/Reset = 0x02).... 11

 

Filter Register (RS1, RS0 = 1, 0; Power-on/Reset = 0x04)..... 12

 

Data Register (RS1, RS0 = 1, 1; Power-on/Reset = 0x0000) . 12

 

ADC Circuit Information.............................................................. 13

 

Overview...................................................................................... 13

 

Noise Performance ..................................................................... 13

 

Reduced Current Modes ........................................................... 13

 

Digital Interface.......................................................................... 14

 

Single Conversion Mode ....................................................... 15

 

Continuous Conversion Mode ............................................. 15

 

Continuous Read Mode ........................................................ 16

 

Circuit Description......................................................................... 17

 

Analog Input Channel ............................................................... 17

 

Programmable Gain Amplifier................................................. 17

 

Bipolar Configuration................................................................ 17

 

Data Output Coding .................................................................. 17

 

Reference Input........................................................................... 17

 

VDD Monitor ................................................................................ 18

 

Grounding and Layout .............................................................. 18

 

Outline Dimensions ....................................................................... 19

 

Ordering Guide .......................................................................... 19

 

REVISION HISTORY

3/13—Rev. 0 to Rev. A

Added ESD Caution Section ............................................................7

Changes to Figure 10.......................................................................15

Change to Reference Input Section...............................................17

Updated Outline Dimensions ........................................................19

Changes to Ordering Guide ...........................................................19

8/03—Revision 0: Initial Version