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ADAU1701 Datasheet

SigmaDSP 28/56-Bit Audio Processor

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Data Sheet
SigmaDSP 28-/56-Bit Audio Processor
with Two ADCs and Four DACs
ADAU1701
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 a 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 are supported
On-chip voltage regulator for compatibility with 3.3 V systems
48-lead, plastic LQFP
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 ADAU1701 is a complete single-chip audio system with a
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
limitations of speakers, amplifiers, and listening environments,
providing dramatic improvements in perceived audio quality.
Its signal processing 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 perfor-
mance. The ADAU1701 is a fully programmable 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.
ADAU1701 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
ADAU1701 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 ADAU1701 communicates through an
I2C® bus or a 4-wire SPI port.
Rev. C
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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 ©2007–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

ADAU1701 Datasheet

SigmaDSP 28/56-Bit Audio Processor

No Preview Available !

ADAU1701
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.................................................................... 6 
Power.............................................................................................. 6 
Temperature Range ...................................................................... 6 
PLL and Oscillator........................................................................ 6 
Regulator........................................................................................ 7 
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 
Data Sheet
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 
2048 to 2055 (0x0800 to 0x0807)—Interface Registers......... 34 
2056 (0x0808)—GPIO Pin Setting Register ........................... 35 
2057 to 2060 (0x0809 to 0x080C)—Auxiliary ADC Data
Registers....................................................................................... 36 
2064 to 2068 (0x0810 to 0x0814)—Safeload Data Registers 37 
2069 to 2073 (0x0815 to 0x819)—Safeload Address
Registers....................................................................................... 37 
2074 to 2075 (0x081A to 0x081B)—Data Capture Registers 38 
2076 (0x081C)—DSP Core Control Register ......................... 39 
2078 (0x081E)—Serial Output Control Register ................... 40 
2079 (0x081F)—Serial Input Control Register....................... 41 
2080 to 2081 (0x0820 to 0x0821)—Multipurpose Pin
Configuration Registers............................................................. 42 
2082 (0x0822)—Auxiliary ADC and Power Control ............ 43 
2084 (0x0824)—Auxiliary ADC Enable.................................. 43 
2086 (0x0826)—Oscillator Power-Down................................ 43 
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 
I2C Control .................................................................................. 50 
SPI Control.................................................................................. 51 
Outline Dimensions ....................................................................... 52 
Ordering Guide .......................................................................... 52 
Rev. C | Page 2 of 52


Part Number ADAU1701
Description SigmaDSP 28/56-Bit Audio Processor
Maker Analog Devices
Total Page 30 Pages
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