AD7791

Data Sheet

Rev. A | Page 2 of 20

TABLE OF CONTENTS

AD7791—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 = 0x8C) ........................................................... 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 = 0x000000).................................................... 13

ADC Circuit Information.............................................................. 14

Overview...................................................................................... 14

Noise Performance..................................................................... 14

Reduced Current Modes ........................................................... 14

Digital Interface.......................................................................... 15

Single Conversion Mode ....................................................... 16

Continuous Conversion Mode............................................. 16

Continuous Read Mode ........................................................ 17

Circuit Description......................................................................... 18

Analog Input Channel ............................................................... 18

Bipolar/Unipolar Configuration .............................................. 18

Data Output Coding .................................................................. 18

Reference Input........................................................................... 18

VDD Monitor................................................................................ 19

Grounding and Layout .............................................................. 19

Outline Dimensions....................................................................... 20

Ordering Guide .......................................................................... 20

REVISION HISTORY

3/13—Rev. 0 to Rev. A

Moved ESD Caution Section............................................................7

Changes to Figure 13.......................................................................15

Changes to Reference Input Section .............................................18

Updated Outline Dimensions........................................................20

Changes to Ordering Guide ...........................................................20

8/03—Revision 0: Initial Version