ADAU1401
Rev. A | Page 2 of 52
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 3
Functional Block Diagram .............................................................. 4
Specifications ..................................................................................... 5
Analog Performance .................................................................... 5
Digital Input/Output .................................................................... 7
Power .............................................................................................. 7
Temperature Range ...................................................................... 7
PLL and Oscillator ........................................................................ 7
Regulator ........................................................................................ 8
Digital Timing Specifications ..................................................... 8
Absolute Maximum Ratings .......................................................... 11
Thermal Resistance .................................................................... 11
ESD Caution ................................................................................ 11
Pin Configuration and Function Descriptions ........................... 12
Typical Performance Characteristics ........................................... 15
System Block Diagram ................................................................... 16
Theory of Operation ...................................................................... 17
Initialization .................................................................................... 18
Power-Up Sequence ................................................................... 18
Control Registers Setup ............................................................. 18
Recommended Program/Parameter Loading Procedure ..... 18
Power Reduction Modes ............................................................ 18
Using the Oscillator .................................................................... 19
Setting Master Clock/PLL Mode .............................................. 19
Voltage Regulator ....................................................................... 20
Audio ADCs .................................................................................... 21
Audio DACs .................................................................................... 22
Control Ports ................................................................................... 23
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C Port ........................................................................................ 24
SPI Port ........................................................................................ 27
Self-Boot ...................................................................................... 28
Signal Processing ............................................................................ 30
Numeric Formats ........................................................................ 30
Programming .............................................................................. 30
RAMs and Registers ....................................................................... 31
Address Maps .............................................................................. 31
Parameter RAM .......................................................................... 31
Data RAM ................................................................................... 31
Read/Write Data Formats ......................................................... 31
Control Register Map ..................................................................... 33
Control Register Details ................................................................ 35
2048 to 2055 (0x0800 to 0x0807)—Interface Registers ......... 35
2056 (0x808)—GPIO Pin Setting Register .............................. 36
2057 to 2060 (0x809 to 0x80C)—Auxiliary ADC Data
Registers ....................................................................................... 37
2064 to 2068 (0x0810 to 0x814)—Safeload Data Registers .. 38
2069 to 2073 (0x0815 to 0x819)—Safeload Address Registers
....................................................................................................... 38
2074 to 2075 (0x081A to 0x081B)—Data Capture Registers 39
2076 (0x081C)—DSP Core Control Register ......................... 40
2078 (0x081E)—Serial Output Control Register ................... 41
2079 (0x081F)—Serial Input Control Register ....................... 42
2080 to 2081 (0x0820 to 0x0821)—Multipurpose Pin
Configuration Registers ............................................................. 43
2082 (0x0822)—Auxiliary ADC and Power Control ............ 44
2084 (0x0824)—Auxiliary ADC Enable .................................. 44
2086 (0x0826)—Oscillator Power-Down ................................ 44
2087 (0x0827)—DAC Setup ...................................................... 44
Multipurpose Pins .......................................................................... 45
Auxiliary ADC ............................................................................ 45
General-Purpose Input/Output Pins ....................................... 45
Serial Data Input/Output Ports ................................................ 45
Layout Recommendations ............................................................. 48
Parts Placement .......................................................................... 48
Grounding ................................................................................... 48
Typical Application Schematics .................................................... 49
Self-Boot Mode ........................................................................... 49
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C Control .................................................................................. 50
SPI Control .................................................................................. 51
Outline Dimensions ....................................................................... 52
Ordering Guide .......................................................................... 52