Patented Technologies Enable CS3511 to Achieve Superior Audio
Performance In Consumer Audio Applications
Expanding its portfolio of Class D-based audio amplifier products,
Cirrus Logic Inc. (Nasdaq: CRUS) has introduced the CS3511, a stereo
10-watt analog-input Class-D audio amplifier IC ideal for consumer audio
applications such as active media speakers, docking stations, hybrid
radios, flat-panel displays and mini-shelf home stereo systems.
The CS3511 uses an advanced Delta Sigma modulator with a patented
closed-loop architecture and true spread-spectrum switching controller
technology to achieve ultra-low distortion and significantly reduced
electromagnetic interference (EMI) compared to other stereo 10-watt
Class-D amplifier ICs. The spread spectrum switching controller
technology enables adaptation to the audio input signal and provides
finer resolution compared to traditional pulse-width modulation (PWM)
methods. With continuous feedback and feedforward paths that reduce the
inherent non-linearity of switching power MOSFETs as well as improve
stability at high switching frequencies, the CS3511 is able to achieve
best in class total harmonic distortion plus noise (THD+N) performance
of 0.025 percent at five watts and 0.019 percent at one watt.
“The CS3511 was designed to provide our customers with a great sounding
amplifier that provides the efficiency of Class-D amplification while
greatly simplifying the system design challenges associated with EMI,”
said Carl Alberty, director of Marketing, Cirrus Logic Mixed Signal
Audio Products.
The CS3511 supports single-ended inputs or fully-differential inputs for
improved common-mode rejection ratio (CMRR) and operates from single 9 V
or 12 V voltage supplies. It also offers built-in protection and error
reporting with automatic recovery from over-current, thermal overload
and under-voltage conditions.
Pricing and Availability
The CS3511 measures 6 X 6 mm and is available today in a thermally
enhanced 32-pin QFN package. It is priced at $1.39 in quantities of
10,000.
Cirrus Logic Inc.
Celebrating its 25th year as a leading fabless semiconductor company in
2009, 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.
Cirrus Logic Inc.
Bill Schnell, 512-851-4084
bill.schnell@cirrus.com
