Table of Contents
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AD7194
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Timing Characteristics ................................................................ 7
Absolute Maximum Ratings ............................................................ 9
Thermal Resistance ...................................................................... 9
ESD Caution .................................................................................. 9
Pin Configuration and Function Descriptions ........................... 10
Typical Performance Characteristics ........................................... 12
RMS Noise and Resolution ............................................................ 15
4
Chop Disabled ................................................................... 15
3
Chop Disabled ................................................................... 16
Fast Settling ................................................................................. 17
On-Chip Registers .......................................................................... 18
Communications Register ......................................................... 19
Status Register ............................................................................. 20
Mode Register ............................................................................. 21
Configuration Register .............................................................. 24
Data Register ............................................................................... 27
ID Register ................................................................................... 27
GPOCON Register ..................................................................... 27
Offset Register ............................................................................. 28
Full-Scale Register ...................................................................... 28
ADC Circuit Information .............................................................. 29
Overview ...................................................................................... 29
Analog Input Channel ............................................................... 30
REVISION HISTORY
10/09-Revision 0: Initial Version
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Programmable Gain Array (PGA) ........................................... 30
Reference ..................................................................................... 30
Reference Detect ......................................................................... 31
Bipolar/Unipolar Configuration .............................................. 31
Data Output Coding .................................................................. 31
Burnout Currents ....................................................................... 31
Digital Interface .......................................................................... 32
Reset ............................................................................................. 36
System Synchronization ............................................................ 36
Enable Parity ............................................................................... 36
Clock ............................................................................................ 36
Temperature Sensor ................................................................... 36
Logic Outputs ............................................................................. 37
Calibration ................................................................................... 37
Digital Filter .................................................................................... 39
4
Filter (Chop Disabled) ..................................................... 39
3
Filter (Chop Disabled) ..................................................... 41
Fast Settling Mode (Chop Enabled) ......................................... 50
Summary of Filter Options ....................................................... 51
Grounding and Layout .................................................................. 52
Applications Information .............................................................. 53
Flowmeter .................................................................................... 53
Outline Dimensions ....................................................................... 54
Ordering Guide .......................................................................... 54
Rev. 0 | Page 2 of 56
4
Filter) ...................................................... 43
3
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4
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3
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