Datasheet

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
V
DD
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 Ve rsi on