ADAU1787
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Interpolation and Decimation Blocks ..................................... 39
Signal Levels................................................................................ 39
FastDSP Core .................................................................................. 40
Instructions ................................................................................. 40
Filter Precision............................................................................ 40
Flags and Conditional Execution............................................. 40
Input Sources .............................................................................. 40
Power and Run Control............................................................. 41
Data Memory.............................................................................. 41
Parameters................................................................................... 41
Parameter Bank Switching ........................................................ 41
Parameter Bank Copying .......................................................... 41
Parameter Memory Access........................................................ 42
FastDSP Parameter Safeload..................................................... 42
SigmaDSP Core .............................................................................. 43
Read/Write Data Formats ......................................................... 44
Software Safeload ....................................................................... 45
FastDSP Safeload........................................................................ 45
Program RAM, Parameter RAM, and Data RAM..................... 46
Program RAM ............................................................................ 46
Parameter RAM.......................................................................... 46
Data RAM ................................................................................... 46
Power Saving Options.................................................................... 47
Control Port .................................................................................... 49
Burst Mode Communication.................................................... 49
Reading and Writing to Memories .......................................... 50
I2C Port ........................................................................................ 50
SPI Port ........................................................................................ 53
Self Boot ...................................................................................... 54
Multipurpose Pins...................................................................... 56
Serial Data Ports ............................................................................. 57
Applications Information .............................................................. 59
Power Supply Bypass Capacitors.............................................. 59
Layout .......................................................................................... 59
Grounding ................................................................................... 59
PCB Stackup................................................................................ 59
Register Summary .......................................................................... 60
Register Details ............................................................................... 67
ADI Vendor ID Register............................................................ 67
Device ID Registers .................................................................... 67
Applications....................................................................................... 1
General Description......................................................................... 1
Revision History ............................................................................... 5
Functional Block Diagram .............................................................. 6
Specifications..................................................................................... 7
Analog Performance Specifications ........................................... 7
Crystal Amplifier Specifications................................................. 9
Digital Input and Output Specifications ................................... 9
Power Supply Specifications...................................................... 10
Power-Down Current ................................................................ 10
Typical Power Consumption..................................................... 10
Digital Filters............................................................................... 11
Digital Timing Specifications ................................................... 12
Absolute Maximum Ratings.......................................................... 16
Thermal Resistance .................................................................... 16
ESD Caution................................................................................ 16
Pin Configuration and Function Descriptions........................... 17
Typical Performance Characteristics ........................................... 20
System Block Diagram................................................................... 27
Theory of Operation ...................................................................... 28
System Clocking and Power-Up ................................................... 29
Power-Down Operation and Options ..................................... 29
Example ADC to DAC Power-up............................................. 30
DVDD LDO Regulator.............................................................. 30
Clock Initialization..................................................................... 30
PLL................................................................................................ 31
Multichip Phase Synchronization ............................................ 32
Clock Output............................................................................... 32
Power Supply Sequencing ......................................................... 32
Signal Routing................................................................................. 33
Input Signal Paths........................................................................... 34
Analog Inputs.............................................................................. 34
Digital Microphone Inputs........................................................ 35
ADCs............................................................................................ 36
Output Signal Paths........................................................................ 37
Analog Outputs........................................................................... 37
DACs ............................................................................................ 37
PDM Outputs.............................................................................. 38
ASRCs .......................................................................................... 38
Rev. 0 | Page 2 of 280
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