Cirrus Logic’s CS8422 Digital Audio Receiver IC with Integrated Sample-Rate Converter Technology Provides Category’s Best...
October 28 2008 - 9:15AM
Business Wire
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� 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.
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