Audio Processor. ADAU1401A Datasheet

ADAU1401A Processor. Datasheet pdf. Equivalent

Part ADAU1401A
Description SigmaDSP 28-/56-Bit Audio Processor
Feature SigmaDSP 28-/56-Bit Audio Processor with Two ADCs and Four DACs ADAU1401A FEATURES 28-/56-bit, 50 M.
Manufacture Analog Devices
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ADAU1401A
SigmaDSP 28-/56-Bit Audio Processor
with Two ADCs and Four DACs
ADAU1401A
FEATURES
28-/56-bit, 50 MIPS digital audio processor
2 ADCs: SNR of 100 dB, THD + N of −83 dB
4 DACs: SNR of 104 dB, THD + N of −90 dB
Complete standalone operation
Self-boot from serial EEPROM
Auxiliary ADC with 4-input mux for analog control
GPIOs for digital controls and outputs
Fully programmable with SigmaStudio graphical tool
28-bit × 28-bit multiplier with 56-bit accumulator for full
double-precision processing
Clock oscillator for generating master clock from crystal
PLL for generating master clock from 64 × fS, 256 × fS,
384 × fS, or 512 × fS clocks
Flexible serial data input/output ports with I2S-compatible,
left-justified, right-justified, and TDM modes
Sampling rates of up to 192 kHz supported
On-chip voltage regulator for compatibility with 3.3 V systems
48-lead, plastic LQFP
Qualified for automotive applications
APPLICATIONS
Multimedia speaker systems
MP3 player speaker docks
Automotive head units
Minicomponent stereos
Digital televisions
Studio monitors
Speaker crossovers
Musical instrument effects processors
In-seat sound systems (aircraft/motor coaches)
GENERAL DESCRIPTION
The ADAU1401A is a complete, single-chip audio system with
28-/56-bit audio DSP, ADCs, DACs, and microcontroller-like
control interfaces. Signal processing includes equalization, cross-
over, bass enhancement, multiband dynamics processing, delay
compensation, speaker compensation, and stereo image widening.
This processing can be used to compensate for real-world limita-
tions of speakers, amplifiers, and listening environments, providing
dramatic improvements in perceived audio quality.
The signal processing of the ADAU1401A is comparable to that
found in high end studio equipment. Most processing is done in
full 56-bit, double-precision mode, resulting in very good low
level signal performance. The ADAU1401A is a fully program-
mable DSP. The easy to use SigmaStudio™ software allows the
user to graphically configure a custom signal processing flow
using blocks such as biquad filters, dynamics processors, level
controls, and GPIO interface controls.
The ADAU1401A programs can be loaded on power-up either
from a serial EEPROM through its own self-boot mechanism or
from an external microcontroller. On power-down, the current
state of the parameters can be written back to the EEPROM from
the ADAU1401A to be recalled the next time the program is run.
Two Σ-Δ ADCs and four Σ-Δ DACs provide a 98.5 dB analog
input to analog output dynamic. Each ADC has a THD + N of
−83 dB, and each DAC has a THD + N of −90 dB. Digital input
and output ports allow a glueless connection to additional ADCs
and DACs. The ADAU1401A communicates through an I2C® bus
or a 4-wire SPI port.
FUNCTIONAL BLOCK DIAGRAM
DIGITAL VDD DIGITAL GROUND
3.3V
3
3
ANALOG VDD ANALOG PLL MODE PLL LOOP
GROUND
FILTER
3 23
CRYSTAL
2
2-CHANNEL
ANALOG
INPUT
1.8V
REGULATOR
FILTA/
ADC_RES 2
STEREO
ADC
ADAU1401A
PLL CLOCK OSCILLATOR
28-/56-BIT, 50MIPS
AUDIO PROCESSOR CORE, 40ms DELAY MEMORY
DAC
DAC
2 FILTD/CM
4-CHANNEL
ANALOG
OUTPUT
RESET/
MODE
SELECT
RESET SELF-BOOT
CONTROL INTERFACE
AND SELF-BOOT
8-CHANNEL 8-BIT AUX
DIGITAL INPUT
ADC
GPIO
8-CHANNEL
DIGITAL OUTPUT
INPUT/OUTPUT MATRIX
5
I2C/SPI AND WRITEBACK
3
DIGITAL IN OR GPIO
Figure 1.
3
AUX ADC OR GPIO
3
DIGITAL OUT OR GPIO
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2010 Analog Devices, Inc. All rights reserved.



ADAU1401A
ADAU1401A
TABLE OF CONTENTS
Features .............................................................................................. 1 
Applications....................................................................................... 1 
General Description ......................................................................... 1 
Functional Block Diagram .............................................................. 1 
Revision History ............................................................................... 3 
Specifications..................................................................................... 4 
Analog Performance .................................................................... 4 
Digital Input/Output.................................................................... 5 
Power.............................................................................................. 6 
Temperature Range ...................................................................... 6 
PLL and Oscillator........................................................................ 6 
Regulator........................................................................................ 6 
Digital Timing Specifications ..................................................... 7 
Absolute Maximum Ratings.......................................................... 10 
Thermal Resistance .................................................................... 10 
ESD Caution................................................................................ 10 
Pin Configuration and Function Descriptions........................... 11 
Typical Performance Characteristics ........................................... 14 
System Block Diagram ................................................................... 15 
Theory of Operation ...................................................................... 16 
Initialization .................................................................................... 17 
Power-Up Sequence ................................................................... 17 
Control Registers Setup ............................................................. 17 
Recommended Program/Parameter Loading Procedure ..... 17 
Power Reduction Modes............................................................ 17 
Using the Oscillator.................................................................... 18 
Setting Master Clock/PLL Mode .............................................. 18 
Voltage Regulator ....................................................................... 19 
Audio ADCs .................................................................................... 20 
Audio DACs .................................................................................... 21 
Control Ports................................................................................... 22 
I2C Port ........................................................................................ 23 
SPI Port ........................................................................................ 26 
Self-Boot ...................................................................................... 27 
Signal Processing ............................................................................ 29 
Numeric Formats........................................................................ 29 
Programming .............................................................................. 29 
RAMs and Registers ....................................................................... 30 
Address Maps.............................................................................. 30 
Parameter RAM.......................................................................... 30 
Data RAM ................................................................................... 30 
Read/Write Data Formats ......................................................... 30 
Control Register Map..................................................................... 32 
Control Register Details ................................................................ 34 
Address 2048 to Address 2055 (0x0800 to 0x0807)—Interface
Registers....................................................................................... 34 
Address 2056 (0x0808)—GPIO Pin Setting Register ............ 35 
Address 2057 to Address 2060 (0x0809 to 0x080C)—
Auxiliary ADC Data Registers.................................................. 36 
Address 2064 to Address 2068 (0x0810 to 0x0814)—Safeload
Data Registers ............................................................................. 37 
Address 2069 to Address 2073 (0x0815 to 0x0819)—Safeload
Address Registers ....................................................................... 37 
Address 2074 and Address 2075 (0x081A and 0x081B)—Data
Capture Registers........................................................................ 38 
Address 2076 (0x081C)—DSP Core Control Register .......... 39 
Address 2078 (0x081E)—Serial Output Control Register .... 40 
Address 2079 (0x081F)—Serial Input Control Register ....... 41 
Address 2080 and Address 2081 (0x0820 and 0x0821)—
Multipurpose Pin Configuration Registers............................. 42 
Address 2082 (0x0822)—Auxiliary ADC and Power Control
Register ........................................................................................ 43 
Address 2084 (0x0824)—Auxiliary ADC Enable Register ... 43 
Address 2086 (0x0826)—Oscillator Power-Down Register . 43 
Address 2087 (0x0827)—DAC Setup Register ....................... 43 
Multipurpose Pins .......................................................................... 44 
Auxiliary ADC............................................................................ 44 
General-Purpose Input/Output Pins....................................... 44 
Serial Data Input/Output Ports ................................................ 44 
Layout Recommendations............................................................. 47 
Parts Placement .......................................................................... 47 
Grounding ................................................................................... 47 
Typical Application Schematics.................................................... 48 
Self-Boot Mode........................................................................... 48 
I2C Control .................................................................................. 49 
SPI Control.................................................................................. 50 
Outline Dimensions ....................................................................... 51 
Ordering Guide .......................................................................... 51 
Rev. A | Page 2 of 52





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