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.
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.
|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|
|AN-951: Using Hardware Controls with SigmaDSP GPIO Pins (pdf, 439 kB)||Application Notes|
|AN-1006: Using the EVAL-ADUSB2EBZ (pdf, 349 kB)||Application Notes|
|AN-923: Designing a System Using the ADAU1701/ADAU1702 in Self-Boot Mode (pdf, 134 kB)||Application Notes|
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.
|VisualDSP++ 5.0 Linker and Utilities Manual (Revision 3.5, January 2011) (pdf, 2290 kB) | Request a CD||Software Manuals|
|UG-072: Evaluation Board User Guide for ADAU1401 (pdf, 888 kB)||User Guides|
Audio Processors, Amplifiers Deliver Complete HDTV Audio Subsystem
ADI: Analog Essential To HDTV Experience
(Electronic Design, 10/1/2007)
Audio Processors Tout Ease of Use
|SigmaDSP® Audio Processors||Overview||HTML|
|SigmaStudio™ Graphical Development Tool||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|
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