AD1974 Data Sheet
Rev. D | Page 2 of 24
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
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 ..................................................................... 14
Control Registers ............................................................................ 18
PLL and Clock Control Registers ............................................. 18
AUXPORT Control Registers ................................................... 19
ADC Control Registers .............................................................. 20
Additional Modes ....................................................................... 21
Application Circuits ....................................................................... 23
Outline Dimensions ....................................................................... 24
Ordering Guide .......................................................................... 24
Automotive Products ................................................................. 24
REVISION HISTORY
3/13—Rev. C to Rev. B
Change to t
CLH
Parameter, Table 7 ................................................... 6
Changes to Serial Control Port Section ........................................ 12
2/11—Rev. B to Rev. C
Changes to Features Section............................................................ 1
Changes to Ordering Guide .......................................................... 24
Added Automotive Products Section .......................................... 24
6/10—Rev. A to Rev. B
Changed 130°C to 125°C Throughout ........................................... 4
Changed T
A
to T
C
Throughout ....................................................... 4
Changes to Endnote 2 in Ordering Guide .................................. 24
11/09—Rev. 0 to Rev. A
Changed Codec to ADC ............................................... Throughout
Changes to Features and General Description Sections .............. 1
Changes to Clock Signals Section ................................................ 11
Changes to Figure 12 and Figure 13 ............................................ 16
Changes to Control Registers Section ......................................... 18
4/07—Revision 0: Initial Version
