NORWOOD, Mass. -- Analog Devices Inc. today announced a new integrated audio IC aimed at replacing low-cost analog systems designs with new digital processing capability that increases sound quality in consumer automotive and home stereo players.
Analog Devices said its new AD1954 SigmaDSP contains a high-quality, audio-optimized digital processing engine, which works with three integrated 112-dB digital-to-analog converters (DACs) to play back music from digital media in consumer systems. While audio sources have been converted to digital media--such as CDs--audio processing in most consumer products remains analog based, said the Norwood chip company.
"The AD1954 SigmaDSP is an alternative to a fully-programmable DSP digital signal processor or all-analog solution," said Patrick O'Doherty, product line director for the Digital Audio Group at Analog Devices. "This first SigmaDSP solution both demystifies DSP development for the analog designer and makes affordable the addition of DSP functionality to a wide range of automotive stereos and to the entire spectrum of home stereo systems."
Analog Devices said the chip's digital audio processing engine can be configured by developers using an "intuitive" graphical user interface (GUI) running under Microsoft Corp.'s Windows operating system. The company said the setup simplifies the digital development process by not requiring any DSP programming expertise.
Because the AD1954 chip integrates high-performance audio converters on chip, signals remain entirely digital from the audio source to the system output, said Analog Devices. Key features include: 3 channels of digital audio; a 7-band, 48-bit stereo equalizer; delays for loudspeaker location adjustment; the company's Phat Stereo spatial enhancement; and a dual-band, professional-quality dynamic processor. Analog Devices said the DACs achieve 112 dB signal-to-noise ratio (SNR) at 48 kHz.
The SigmaDSP digital audio processor is available in either a 44-pin MQFP or a 48-pin TQFP package. It has a temperature range of -40 to +105 degrees C. The AD1954 is available in sample quantities now, and production is slated to start in the first quarter of 2002. The chip sells for $5.88 each in quantities of 10,000.