Cirrus Logic's CS8422 Digital Audio Receiver IC with Integrated Sample-Rate Converter Technology Provides Category's Best Jitter Rejection for Consumer, Pro Audio Applications.

CS8422 Offers High-Performance, Multiple Features in Very Small Package

AUSTIN, Texas -- Cirrus Logic Inc. (Nasdaq: CRUS) has introduced the CS8422, a 24-bit, 192 kHz digital audio receiver with a low-jitter PLL and integrated asynchronous sample rate converter. The CS8422 gives designers of consumer and professional audio applications a top-value solution for receiving a variety of incoming digital audio sources - such as from set top boxes, Blu-ray([R]) Disc players and game consoles - and ensures audio quality is maintained throughout the entire signal processing chain from digital audio input to analog output.

The digital audio receiver utilizes a high performance PLL, which does not require any external loop filter components, for ultra-low jitter clock recovery and high jitter rejection from incoming audio streams. The CS8422 integrates an input multiplexer that supports up to four S/PDIF or two differential AES3 audio inputs, receiver to transmitter pass-through and TDM mode for automotive applications.

"The CS8422 was designed to lock to any digital audio source, good quality or bad, and the performance of the PLL makes that possible," said Carl Alberty, director of Marketing, Mixed Signal Audio Division, Cirrus Logic. "The integrated sample rate converter simplifies designs and ensures the audio quality of the signal is not compromised."

Digital audio can be routed from the receiver output or a standard serial audio port into the stereo asynchronous sample rate converter. The sample rate converter removes the requirement for designs to vary system clocking to support digital audio sources of different sample rates. Supporting input/output rations from 6:1 and 1:6, the CS8422 provides transparent conversion with 140dB dynamic range and -120dB THD+N performance. The CS8422 combines the ideal performance and cost for audio applications such as home theater systems, televisions, media centers, mixing consoles and effects processors, multitrack recorders and PC soundcards.

The CS8422 is offered in a 32-lead QFN package and operates from a single, 3.3V supply with on-chip level shifters to support a direct interface to logic levels from 1.8V to 5V. Audio data is input through the digital interface receiver or a three-wire serial audio input port, with audio output through one of two three-wire serial output ports. Its phase-lock loop core provides high tolerance to input jitter, and can output 192Fs, 384Fs, 512Fs, 768Fs, or 1024Fs recovered output clock rates.

Pricing and availability

The CS8422, which is in volume production, is available in a 32-pin QFN package and is priced at $3.84 in quantities of 10,000.

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. More information about Cirrus Logic is available at www.cirrus.com.

Cirrus Logic and Cirrus are trademarks of Cirrus Logic Inc. All other product names noted herein may be trademarks of their respective holders.