SigmaDSP® Audio Processors

SigmaDSP^® digital audio processors enable anyone to use a fully programmable audio DSP that is easily configurable through the SigmaStudio^™ graphical development tool. The latest SigmaDSP products address the automotive and portable audio markets with our highest performance SigmaDSP and most power-conscious processors. The ADAU1442, ADAU1445, and ADAU1446 SigmaDSPs combine a 172 MHz core with a routing matrix, including asynchronous sample rate converters and S/PDIF Rx/Tx. The routing matrix allows connection of many digital sources running at different sample rates to seamlessly connect to the audio processor.

The first low power SigmaDSPs, the ADAU1761 and ADAU1781, include the same powerful SigmaDSP found in other parts and is paired with stereo ADCs and DACs at an SNR performance greater than 100 dB. The AD1940 and AD1941 feature high processing power with high I/O channel counts. The ADAU1701 and ADAU1702 incorporate full analog I/O, digital I/O, and standalone functionality to provide a full audio processing system on a single chip. The ADAU1401A has similar functionality to the ADAU1701, but is designed specifically for the automotive market and specified over an extended temperature range.

The SigmaStudio graphical development tool is the programming, development, and tuning software for the SigmaDSP audio processors. 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. This tool allows engineers with no DSP code writing experience to easily implement a DSP into their design and yet is still powerful enough to satisfy the demands of experienced DSP designers. SigmaStudio links with both Analog Devices evaluation boards and production designs to provide full in-circuit real-time IC control.

Along with its graphical DSP signal flow development, SigmaStudio also includes other features to speed up the design cycle from product concept to release. SigmaStudio includes tools for intuitively setting control registers, calculating tables of filter coefficients, visualizing filter magnitude and phase responses, generating C header files, and sequencing a series of controls to ease your transition from SigmaStudio to system implementation on your microcontroller.

Evaluation kits, including evaluation boards and the full SigmaStudio tools package, are available now for all SigmaDSP products. Check the SigmaDSP FAQ for any questions you might have. If they are not answered there, direct any SigmaDSP support inquiries to the SigmaDSP Support Forum on EngineerZone.

Read more about SigmaDSP and SigmaStudio Products ...

AD1954 one of EDN's 100 Top Products for 2004