Cirrus Logic Debuts CS47048 32-Bit DSP for Audio Amplifier Applications

Cirrus Logic Inc. (Nasdaq: CRUS) has introduced the industry’s highest-performance audio system-on-a-chip (SOC), the CS47048, targeting audio amplifier applications. By combining an advanced 32-bit audio DSP, high performance multichannel audio codec and a digital audio receiver/transmitter into a single IC, the CS47048 dramatically reduces overall board space requirements and system cost.

The CS47048 features an advanced, 32-bit single core audio processor with powerful customer programming tools and multibit Delta-Sigma audio converter technology, both of which provide best in class performance. This integration allows audio amplifier designers to greatly simplify designs by reducing the number of ICs required to implement an automotive amplifier by as many as 10, depending on channel count and signal processing requirements. This chip reduction, which includes A/D converters, D/A converters, DSP, memory, and SPDIF I/O, dramatically reduces the board space required and system cost.

“With the CS47048, we’ve packed a high performance audio DSP and audio converters onto the same piece of silicon and supported it with our easy to use DSP Composer programming environment,” said Jason Rhode, president and chief executive officer, Cirrus Logic. “It’s a strong technological achievement, and it allows designers to reduce component count and more easily achieve their system requirements without sacrificing audio quality.”

Cirrus Logic’s patented and patent-pending technology on the CS47048 allows the mixed-signal audio converters to be co-located on the same silicon as the high-speed DSP while maintaining premium analog performance. This patented technology features new continuous time architectures, which improves the isolation between the converters and DSP and allows for the high-performance capability of the DSP with negligible impact to the converter performance. The 4-channel ADC measures 105 dB dynamic range and -98 dB THD+N and the 8-channel DACs offer 108 dB dynamic range and -98 dB THD+N – both superior metrics among SOC products and on par with the best stand-alone multichannel codecs available in the market today. Taking into account the convergence of digital media in automotive audio systems, including media players, radio, Bluetooth and navigation devices, the integrated sample rate converters simplify the management of audio sources at any sample rate up to 192 kHz. These digital audio sources can be accommodated through either the on-chip 192 kHz S/PDIF receiver and transmitter or the standard serial audio ports.

Whereas some audio system-on-a-chip solutions offer limited 24-bit or 28-bit DSP solutions, the CS47048 features a potent 32-bit, audio-optimized fixed-point DSP operating at 150 MHz with greater on-chip memory than competitive solutions. With this greater signal processing capacity, the CS47048 supports more channels, higher sample rates and processing chains. Customer programming is simplified through DSP Composer[tm] software, a powerful graphical programming tool that offers a wide array of audio drag-and-drop building blocks in which customers can easily adjust filters, delay, bass boost, graphic/parametric EQ and many other audio parameters. Cirrus Logic also provides numerous standard third-party audio algorithms from leading companies such as Dolby, DTS, SRS Labs and THX. The CS47048 is also software upgradeable, ensuring readiness for future audio features.

Cirrus Logic expects to sample the CS47048 to key customers in the December quarter of 2008. The CS47048 is available in a 100-pin LQFP package and is priced at $6.12 in quantities of 10,000.

About Cirrus Logic Inc.
Cirrus Logic develops high-precision, analog and mixed-signal integrated circuits for a broad range of consumer and industrial markets. Building on its diverse analog and signal-processing patent portfolio, Cirrus Logic delivers highly optimized products for consumer and commercial audio, automotive entertainment, and industrial and aerospace applications. The company operates from headquarters in Austin, Texas, with offices in Tucson, Ariz., Europe, Japan and Asia.

Cirrus Logic, Cirrus and DSP Composer are trademarks of Cirrus Logic Inc.