
AD1974
TABLE OF CONTENTS
Features..............................................................................................1
Applications.......................................................................................1
General Description.........................................................................1
Functional Block Diagram..............................................................1
Revision History...............................................................................2
Specifications.....................................................................................3
Test Conditions.............................................................................3
Analog Performance Specifications...........................................3
Crystal Oscillator Specifications.................................................4
Digital Input/Output Specifications...........................................4
Power Supply Specifications........................................................5
Digital Filters.................................................................................5
Timing Specifications ..................................................................5
Absolute Maximum Ratings............................................................7
Thermal Resistance......................................................................7
ESD Caution..................................................................................7
Pin Configuration and Function Descriptions.............................8
Typical Performance Characteristics...........................................10
REVISION HISTORY
4/07—Revision 0: Initial Version
Rev. 0 | Page 2 of 24
Theory of Operation...................................................................... 11
Analog-to-Digital Converters (ADCs).................................... 11
Clock Signals............................................................................... 11
Reset and Power-Down............................................................. 11
Serial Control Port..................................................................... 12
Power Supply and Voltage Reference....................................... 12
Serial Data Ports—Data Format............................................... 12
TDM Modes................................................................................ 13
Daisy-Chain Mode..................................................................... 15
Control Registers............................................................................ 18
PLL and Clock Control Registers............................................. 18
AUXPORT Control Registers................................................... 19
ADC Control Registers.............................................................. 20
Additional Modes....................................................................... 22
Application Circuits....................................................................... 23
Outline Dimensions....................................................................... 24
Ordering Guide............................................................................... 24