adau1381 Analog Devices, Inc., adau1381 Datasheet - Page 2

• Manufacturer Part Number: adau1381
• Description: Low-noise Stereo Codec With Enhanced Recording And Playback Processing
• Manufacturer: Analog Devices, Inc.

ADAU1381
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 3
Specifications ..................................................................................... 4
Absolute Maximum Ratings .......................................................... 14
Pin Configuration and Function Descriptions ........................... 15
Typical Performance Characteristics ........................................... 17
System Block Diagrams ................................................................. 20
Theory of Operation ...................................................................... 24
Startup, Initialization, and Power ................................................. 25
Clocking and Sampling Rates ....................................................... 27
Record Signal Path .......................................................................... 30
Record Side Performance Specifications ................................... 4
Output Side Performance Specifications ................................... 6
Power Supply Specifications........................................................ 8
Typical Power Management Measurements ............................. 9
Digital Filters ................................................................................. 9
Digital Input/Output Specifications......................................... 10
Digital Timing Specifications ................................................... 11
Thermal Resistance .................................................................... 14
ESD Caution ................................................................................ 14
Power-Up Sequence ................................................................... 25
Clock Generation and Management ........................................ 26
Enabling Digital Power to Functional Subsystems ................ 26
Setting Up the Sound Engine .................................................... 26
Power Reduction Modes ............................................................ 26
Power-Down Sequence .............................................................. 26
Core Clock ................................................................................... 27
Sampling Rates ............................................................................ 27
PLL ............................................................................................... 28
Rev. A | Page 2 of 84
Playback Signal Path ...................................................................... 32
Control Ports ................................................................................... 33
Serial Data Input/Output Ports .................................................... 38
General-Purpose Input/Outputs .................................................. 40
Sound Engine .................................................................................. 41
Applications Information .............................................................. 42
Control Register Map ..................................................................... 43
Input Signal Path ........................................................................ 30
Analog-to-Digital Converters ................................................... 31
Digital Dual-Band Automatic Level Control (ALC) ............. 31
Output Signal Paths ................................................................... 32
Digital-to-Analog Converters ................................................... 32
Line Outputs ............................................................................... 32
Speaker Output ........................................................................... 32
I
SPI Port ........................................................................................ 36
Memory and Register Access .................................................... 36
TDM Modes ................................................................................ 38
Signal Processing ........................................................................ 41
Processing Flow .......................................................................... 41
Programming .............................................................................. 41
Parameter Memory .................................................................... 41
Power Supply Bypass Capacitors .............................................. 42
GSM Noise Filter ........................................................................ 42
Grounding ................................................................................... 42
Speaker Driver Supply Trace (AVDD2) .................................. 42
Exposed Pad PCB Design ......................................................... 42
Clock Management, Internal Regulator, and PLL Control ... 44
Record Path Configuration ....................................................... 48
Serial Port Configuration .......................................................... 53
Audio Converter Configuration ............................................... 58
Playback Path Configuration .................................................... 63
2
C Port ........................................................................................ 33