Cirrus Logic Ultra-Low Power, 4-Channel Microphone A/D Converter Enhances Performance for Voice Applications
July 24 2013 - 3:15PM
Business Wire
Focusing on enabling enhanced voice processing features in
smartphones, tablets and other consumer electronics applications,
Cirrus Logic, Inc. (Nasdaq: CRUS) has introduced the ultra-low
power CS53L30 analog-to-digital (A/D) converter.
With ultra-low power consumption of less than 2.5 mW per
channel, the CS53L30’s high-performance, four-channel microphone
A/D converters enhance voice processing features such as noise
suppression, acoustic echo cancellation and multi-channel
beamforming and offer improved performance in voice capture
processing for voice control and recognition. The CS53L30 is
currently shipping in volume production in multiple handsets to a
leading manufacturer of high-quality smartphones.
“The performance of today’s voice processing algorithms relies
heavily on the integrity of the captured audio source,” said Carl
Alberty, director of marketing for Cirrus Logic’s Mixed Signal
Audio Division. “With its high-precision analog performance, the
CS53L30 will launch a new generation of mobile consumer products
that differentiate the voice experience and offer improved voice
control with the user interface.”
In a typical microphone-array application, multiple microphones
embedded within a device aim to hone in on the audio’s source and
eliminate or attenuate surrounding noise. With the CS53L30, each of
the four microphone channels has a dedicated mic bias for improved
channel-to-channel separation, which enhances the performance of
beamforming algorithms. Digital signal processing features such as
high-pass filters, noise gates and volume controls provide further
pre-conditioning, which is essential to improve voice-processing
performance.
A flexible input front end accommodates a combination of digital
and analog microphone inputs in fully differential,
pseudo-differential and single-ended configurations. A single
CS53L30 can output its four channels of audio data up to 48 kHz
sample rate over two I2S ports, or a single TDM port in master or
slave mode. For applications that require additional mic inputs, up
to four CS53L30 A/D converters can be used together to output 16
channels of data over a single TDM line allowing for seamless
system integration.
The CS53L30 can be controlled through a high speed I2C control
port and is powered by a 1.8V nominal analog supply and a typical
3.6V battery supply.
Pricing and Availability
The CS53L30 is available in a 30-ball 0.4-mm pitch WLCSP package
and 32-pin 5 X 5-mm QFN package. The QFN package is priced at $1.31
(USD) and the WLCSP package is priced at $1.03 (USD) in quantities
of 100,000.
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
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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