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ADAU1702:  SigmaDSP® 28-/56-Bit Audio Processor with Two ADCs and Four DACs

Product Details


The ADAU1702 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 ADAU1702 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.

ADAU1702 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 ADAU1702 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 ADAU1702 communicates through an I2C bus or a 4-wire SPI port.

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)

FEATURES and BENEFITS

  • 28-/56-bit, 25 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 a master clock from 64 × fS, 256 × fS, 384 × fS, or 512 × fS clocks
  • Please see data sheet for additional features

Functional Block Diagram for ADAU1702

For evaluating the ADAU1702, please use the EVAL-ADAU1701MINIZ. The ADAU1702 only differs from the ADAU1701 in program and data memory size. You can get further information from the SigmaDSP FAQ. If your questions are not answered there, direct any SigmaDSP support inquiries to the SigmaDSP support forum on EngineerZone.

Documentation

Title Content Type File Type
ADAU1702: SigmaDSP® 28-/56-Bit Audio Processor with Two ADCs and Four DACs Data Sheet (Rev C, 06/2011) (pdf, 1155 kB) Data Sheets PDF
AN-951: Using Hardware Controls with SigmaDSP GPIO Pins  (pdf, 439 kB) Application Notes PDF
AN-1006: Using the EVAL-ADUSB2EBZ  (pdf, 349 kB) Application Notes PDF
AN-923: Designing a System Using the ADAU1701/ADAU1702 in Self-Boot Mode  (pdf, 134 kB) Application Notes PDF
Sigma Studio Overview
Familiar audio processing blocks can be wired together as in a schematic, and the compiler generates DSP-ready code and a control surface for setting and tuning parameters.
Videos HTML
VisualDSP++ 5.0 Linker and Utilities Manual (Revision 3.5, January 2011)  (pdf, 2290 kB) | Request a CD Software Manuals PDF
UG-072: Evaluation Board User Guide for ADAU1401  (pdf, 888 kB) User Guides PDF
Audio Processors, Amplifiers Deliver Complete HDTV Audio Subsystem
(EE Times, 10/1/2007)
Product Reviews HTML
ADI: Analog Essential To HDTV Experience
(Electronic Design, 10/1/2007)
Product Reviews HTML
Audio Processors Tout Ease of Use
(eeProductCenter, 12/6/2005)
Product Reviews HTML
SigmaDSP® Audio Processors Overview HTML
Which SigmaDSP is right for my application? FAQs/RAQs HTML
Which SigmaDSP parts are qualified for automotive applications? FAQs/RAQs HTML
What evaluation boards are available for the SigmaDSP processors? FAQs/RAQs HTML
What advanced algorithms are available for SigmaDSP? FAQs/RAQs HTML
What is needed to boot a SigmaDSP processor? FAQs/RAQs HTML
What is the processing power and RAM sizes of the different SigmaDSPs? FAQs/RAQs HTML
How can I program and tune my target application using SigmaStudio? FAQs/RAQs HTML
When should I use double precision and when should I use single precision filters? FAQs/RAQs HTML
How do I protect my SigmaDSP design against power supply overvoltage and ESD? FAQs/RAQs HTML
How can I get a copy of SigmaStudio? FAQs/RAQs HTML
I already have a copy of SigmaStudio. How can I get the latest version? FAQs/RAQs HTML
Where can I find a description of the changes made in the latest version of SigmaStudio? FAQs/RAQs HTML
What are the PC requirements for SigmaStudio? FAQs/RAQs HTML
What documentation is available for SigmaStudio? FAQs/RAQs HTML
Can I use SigmaStudio without hardware connected? FAQs/RAQs HTML
How can I write my own algorithms in SigmaStudio? FAQs/RAQs HTML
After I link-compile-download my project, the bar at the bottom of SigmaStudio turns green. Does this mean my program downloaded to the DSP successfully? FAQs/RAQs HTML
How can I check that I have proper communication between SigmaStudio and the SigmaDSP hardware? FAQs/RAQs HTML
How can I see exactly what SigmaStudio is writing to the target hardware? FAQs/RAQs HTML
How do I change the sampling rate of my design in SigmaStudio? FAQs/RAQs HTML
Where can I see how much of the SigmaDSP resources my project consumes? FAQs/RAQs HTML
My signal flow is running out of instructions. What can I do to save resources? FAQs/RAQs HTML
I can't use the maximum delay memory in my project. What's happening? FAQs/RAQs HTML
When the signal input to my compressor is above 6 dB, the compression stops and my signal starts increasing. What's happening? FAQs/RAQs HTML
How can I eliminate pops when changing the delay parameter at run-time? FAQs/RAQs HTML
My application requires that I use multiple blocks that generate many addresses that I then have to map to my microcontroller code. Can I fix specific memory addresses for specific blocks to avoid all this mapping overhead? FAQs/RAQs HTML
What is the difference between the ADAU1701, ADAU1702, and ADAU1401? FAQs/RAQs HTML
What evaluation boards are available for the ADAU1701, ADAU1702, and ADAU1401? FAQs/RAQs HTML
How can I tune my own hardware design using SigmaStudio? FAQs/RAQs HTML
How can I use the multipurpose pins on the ADAU1401/1701/1702? FAQs/RAQs HTML
Can I use selfboot to load multiple different programs? FAQs/RAQs HTML
Where can I get further support for the SigmaDSP? FAQs/RAQs HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
Firmware Loader for SigmaDSPs Device Drivers HTML
ADAU1701 Sound Audio System Linux Driver (Wiki Site) Device Drivers HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

SampleSample & Buy

Price, packaging, availability

ADAU1702 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADAU1702JSTZ Status: Production 48 ld LQFP 48 Comm. Tray, 250 $3.95 $3.57 Y  Material Info PCN Purchase Sample
ADAU1702JSTZ-RL Status: Production 48 ld LQFP 48 Comm. Reel, 2000 - $3.57 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADAU1701 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADAU1701MINIZ Status: Production Limited Capability Evaluation Board $195.00 Yes -
EVAL-ADAU1401AEBZ Status: Production Full Capability Engineering Evaluation Board $599.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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