Cirrus Logic Expands Portable Audio Chip Leadership into Markets for Mobile Communications and Smartphones
June 08 2010 - 9:00AM
Business Wire
Building upon its initial success with innovative ICs for
targeted smartphone applications, Cirrus Logic Inc. (Nasdaq: CRUS)
is expanding its portfolio of standard products for smartphones and
mobile consumer electronics applications.
The CS42L73 is a high-quality, ultra low-power audio codec
designed for smartphone applications, and the CS35L0X is an
analog-input, hybrid Class D speaker amplifier for mobile
communications and portable devices. These products build upon the
company’s technology leadership in portable audio products and help
solve multiple system challenges encountered by designers in the
areas of extending battery life, improving audio quality,
simplifying signal management and reducing electrical-magnetic
interference (EMI) while enabling smaller form factors.
Smartphones, which combine the functions of a PC, mobile phone
and personal media player all in a single device, are increasingly
being tasked to efficiently manage a higher multitude of
interactive features and media-rich content. These applications
require an increased demand for higher processing performance and
system power usage – all at a time when consumers are demanding
longer battery life. The CS42L73 codec allows power-hungry
smart phones to conserve energy and extend battery life by
offloading audio-related tasks, such as signal routing and
processing, typically reserved for the applications processor.
Analyst firm iSuppli has forecasted that smartphone sales will
nearly double to 497 million units by 2014.
“Cirrus Logic is expanding its product portfolio in mobile
communications for a broad range of customers,” said Jason Rhode,
president and chief executive officer, Cirrus Logic. “Our strategy
is to continue to develop innovative products such as the CS42L73
and CS35L0X that solve real problems for smartphones and portable
devices, especially in areas such as lowering system power while
retaining high audio quality.”
The CS42L73 is available today and is also featured on the XMM
6260 reference design from Infineon Technologies AG.
With three serial audio ports and asynchronous sample rate
converters, the CS42L73 is able to manage the complex routing,
processing and mixing of a variety of multiformat audio signals,
such as voice, music MP3s, ringtones and streaming audio, while
increasing overall system efficiency. Its rated power consumption
is as low as 4 mW during a voice call, offering the lowest power
consumption in the market of a product with asynchronous sample
rate converters and a digital mixing engine in the signal path.
Stereo playback to the headphone is even better, as the CS42L73
only dissipates 3.5 mW.
A Cirrus Logic whitepaper “Unleashing the Audio Potential of
Smartphones” explaining the challenges of evolving roles of audio
ICs in mobile communications applications is available here.
The CS42L73 features two analog-to-digital converters and four
digital-to-analog converters (DACs) based on an advanced,
high-quality, multibit Delta Sigma architecture. The DACs can drive
five outputs, including ground-centered stereo Class H headphone
and line drivers, an ear-piece driver and a low EMI hands-free
speaker driver. The analog front end supports both line and
microphone inputs with both programmable gain amplifiers and
automatic level control. Dual microphone pre-amplifiers and bias
supplies are integrated for analog microphones, and an interface
for dual digital microphones is also included.
CS35L0X: Extending Power Savings, Improving Audio
Performance
To meet the multiple challenges of delivering high-quality audio
in a mobile handset application while keeping noise and power
consumption low, Cirrus Logic has also developed the CS35L00
(+6/+12 dB gain), CS35L01 (+6 dB gain), and CS35L03 (+12 dB gain)
hybrid Class D audio amplifiers. Using an advanced closed-loop
Delta Sigma architecture and patent-pending hybrid Class D
technology, the amplifier family combines Class D efficiency and
output power with low idle current consumption and minimal EMI
found typically only in class AB amplifiers.
The CS35L00 family of amplifiers consumes only 0.9mA of
quiescent current, which is 40 percent less than the nearest
competitor. This advantage is enabled by patent-pending techniques
for adjusting the amplifier voltage rails to suit the signal being
amplified and not waste power when the amplifier is idle or the
output signal is at a low amplitude. Combined with proprietary
dynamic output switching frequency adjustment and edge control, the
CS35L00 family delivers superior EMI performance, power consumption
and audio quality. These ICs target not only smartphones and
general market handsets but also other consumer applications such
as laptop computers, wireless headsets, digital video cameras and
camcorders and portable gaming devices.
Pricing and Availability
The CS42L73, which is provided in a 64-ball WLCSP package, is
available in volume production and priced at $1.95 in quantities of
10,000. The CS35L00 is available in a 10-pin DFN package and the
CS35L01/03 are available in a 9-ball WLCSP package, and are pin
compatible. Both ICs are in volume production. The CS35L00 is
priced at $.35 in quantities of 10,000 and the CS35L01/03 are
priced at $0.32 in quantities of 10,000.
Cirrus Logic, Inc.
Cirrus Logic develops high-precision, analog and mixed-signal
integrated circuits for a broad range of innovative customers.
Building on its diverse analog and signal-processing patent
portfolio, Cirrus Logic delivers highly optimized products for a
variety of audio and energy-related 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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