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Analog Products: Audio
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| Audio | | Data Conversion Systems | | Displays | | Interface | | Microcontrollers | | Operational Amplifiers | | Power Management | | Temperature Sensors | | Wireless | | More Products |
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The PowerWise LMV1088 dual-input microphone array amplifier uses National's far-field noise suppression technology to reduce background noise and improve voice communication clarity in mobile phones, two-way radios and powered headsets. The device consumes one-tenth the power (1 mA) of comparable DSP or microprocessor software-based systems, setting a new standard for low power consumption.
Press Release February 28, 2008
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The LMV1088 dual-input microphone array amplifier incorporates two differential input microphone amplifier channels, microphone calibration circuitry stored in EEPROM and National Semiconductor’s breakthrough far-field noise suppression processing circuitry.
Press Release February 28, 2008
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Part of National Semiconductor's high-fidelity LMETM audio amplifier family, the LME49600 buffer delivers the industry's lowest noise and harmonic distortion for professional audio applications.
Press Release January 21, 2008
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National Semiconductor's LME49811 and LME49830 are 200V mono audio power amplifier input stages that deliver industry-leading low distortion performance and reduce design time.
Press Release January 15, 2008
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Further expanding its high-fidelity operational amplifier family, National Semiconductor introduced a 5V rail-to-rail input and output (RRIO) and a 36V current feedback operational amplifier. The LME49721 RRIO op amp's combined specifications provide the high-fidelity performance and signal conditioning required by high-end portable devices and applications where supply rails are limited to lower voltages. The LME49713 current feedback op amp delivers ultra-low distortion, low noise, extended bandwidth past 190 MHz and fast settling times down to 50 nanoseconds.
Press Release October 1, 2007
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National Semiconductor's LM48511 audio amplifier with spread spectrum and integrated boost converter reduces EMI sensitivity in push-to-talk cell phones, portable GPS, MP3 docking stations with portable speakers, as well as a broad range of other battery-powered applications.
Press Release September 26, 2007
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The new LME49810 from National Semiconductor is a single-chip 200V power amplifier driver with integrated Baker Clamp that replaces more than 25 discrete components in high-power audio amplifiers. The LME49810 not only reduces system cost and simplifies design, it also enables slimmer, more elegant design capability, with more channels and more power per square-inch of chassis space.
Press Release July 23, 2007
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National Semiconductor's new LME™ family of high-fidelity audio op amps practically eliminates distortion, with total harmonic distortion plus noise (THD+N) of 0.00003 percent. This record low THD+N figure enables high-end audio manufacturers to produce systems with cleaner "true to the original recording" sound quality.
Press Release July 23, 2007
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National Semiconductor's LM48555 drives ceramic speakers in cell phones, smartphones, notebook computers and other small handheld devices.
Press Release May 29, 2007
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The LM48510 is the industry's first constant output Class D audio amplifier. It enables manufacturers to design portable products that are able to operate at constant high-level output power even as batteries deplete to lower voltages.
Press Release February 5, 2007
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A new mono, 2.65W, Class D Boomer® audio amplifier from National Semiconductor reduces EMI more than 11 dB below the United States Federal Communications Commission (FCC) limit to lower system noise in portable devices including cell phones, smart phones, music and DVD players, gaming devices and other portable electronics.
Press Release October 23, 2006
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A new dual, high-fidelity audio operational amplifier from National Semiconductor practically eliminates distortion, with total harmonic distortion plus noise (THD+N) of 0.00003 percent.
Press Release September 25, 2006
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National Semiconductor introduced the industry's first integrated, 200V stereo driver for high-power amplifiers. The LM4702, the first member of a new high-performance audio family, is available in three grades, all with mute functions, to suit a variety of demanding consumer and professional audio applications.
Press Release September 19, 2006
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National Semiconductor introduced two Boomer® Class AB amplifiers in a 0.4 mm-pitch package, the world’s smallest micro SMD package. The LM4941 1.25W audio amplifier and LM4985 stereo headphone amplifier provide low quiescent current and high output power, extending battery life in portable electronic devices, MP3 players, mobile phones and other similar applications.
Press Release August 14, 2006
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Two new Boomer® audio subsystems from National Semiconductor integrate radio-frequency (RF) suppression technology to improve noise performance in portable applications. National's LM4946 and LM4947 audio subsystems contain a mono amplifier, output capacitor-less (OCL) stereo headphone amplifiers and National's programmable 3D sound enhancement.
Press Release June 19, 2006
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National Semiconductor's family of three Boomer® ground-referenced stereo headphone amplifiers, the LM4920, LM4981 and LM4982, eliminates external blocking capacitors for portable music players, mobile phones, CD players, personal digital assistants, media players, notebook computers and other portable applications.
Press Release May 22, 2006
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National Semiconductor offers the LM4995 Boomer® 1.3W mono Class AB audio amplifier in the world’s smallest micro SMD package for cell phone handsfree and ringer functions.
Press Release April 17, 2006
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National Semiconductor introduced two single-chip Boomer® audio power amplifiers in ultra-small packages. The LM4962 and LM4953, the next generation in National’s industry-leading ceramic speaker driver family, provide high capacitive loads for portable applications such as cell phones, smartphones, notebook computers and other small handheld devices.
Press Release January 23, 2006
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The industry's smallest audio subsystem with a mono Class D speaker driver from National integrates all the analog and digital audio functions needed for smart phones and voice-over-Internet procotol (VoIP) phones. The LM4935 subsystem's new 4 mm by 4 mm micro SMDxt package saves up to 70 percent board space over existing packages.
Press Release January 9, 2006
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To save even more space in portable applications, National Semiconductor introduced the LM4673, a Boomer® mono Class D audio amplifier in the world's smallest micro SMD package. In addition, the company introduced the LM4674, a high-power stereo Class D amplifier. Both provide high-quality output power with a minimal number of external components for cell phones, smart phones and portable audio devices such as DVD players and gaming devices.
Press Release December 19, 2005
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To save even more space in portable applications, National Semiconductor introduced a Boomer® mono Class D audio amplifier in the world's smallest package, a 1.4 mm by 1.4 mm, 0.4 mm-pitch micro SMD package. The LM4673 provides high-quality output power with a minimal number of external components for cell phones, smart phones and portable audio devices such as DVD players and gaming devices.
Press Release December 19, 2005
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National Semiconductor introduced the LM4934 Boomer® stereo audio subsystem, the industry's first subsystem to incorporate both digital and analog input paths for multimedia, smart and voice-over-Internet procotol (VoIP) phones. The subsystem offers 3D enhancement for improved stereo audio sound in a new package with a small footprint.
Press Release December 12, 2005
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National's Boomer® LM4844 audio subsystem simplifies development of superior full-bandwidth stereo and 3D sound in mobile phones and other battery-powered devices.
Press Release September 12, 2005
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Two new single-chip Boomer® audio amplifiers from National Semiconductor Corporation deliver up to 1.8 Watts of output power to mobile phone and portable devices regardless of the battery's voltage.
Press Release August 9, 2005
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National's LM4845 audio subsystem integrates the audio amplifiers, volume control, mixer, eight output modes, power management control, 3D sound enhancement and I2C compatible control into a single package. The LM4888 stereo 2.1W speaker and headphone amplifier provides 3D programmability for the speaker and headphone, and ultra-low shutdown current for battery savings.
Press Release June 14, 2005
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National Semiconductor's LM4970 is a "no-programming-required" Boomer® audio-synchronized light emitting diode (LED) driver. Previous designs required pre-programmed I2C compatible code to control lighting patterns. National's LM4970 gives designers the option of using I2C compatible pattern control or choosing automatic audio-synchronized pattern generation. If the automatic mode is used, no software or memory storage is needed for pattern control, freeing up memory storage space for other features. The internal control features of the LM4970 reduce the number of external components, optimizing board space in small form factor applications such as cell phones, MP3 players, PDAs and other portable devices.
Press release May 2, 2005
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National's LM4884 Boomer audio amplifier is designed to suppress strong RF signals and produce clean sound in notebook computers enabled with WiFi/802.11, GSM cards or modems. The device also suppresses RF noise generated by cell phones or other wireless devices operating in close proximity to the notebook computer.
Press release April 25, 2005
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National Semiconductor's LM4670/71 high-efficiency Class D Boomer® audio amplifiers are housed in tiny micro SMD packages and feature externally configurable gain for space savings and flexibility in design. Additionally, they feature a low power consumption shutdown mode for extended battery life. These two parts are ideal for applications such as cellular phones, PDAs and other portable electronic devices.
Press Release March 14, 2005
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National Semiconductor's LM4802B, LM4960 and LM4961 Boomer® audio amplifiers are the industry’s first single-chip devices to drive ceramic and piezoelectric speakers in portable applications. These integrated chips allow manufacturers to create “credit-card-thin” handsets or add additional features to designs because they save space and reduce power consumption, enabling longer battery life and talk time.
Press Release January 6, 2005
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National Semiconductor's WEBENCH® online design environment now includes audio amplifiers, providing the industry’s first online tool created to speed the selection, design and evaluation of many types of audio amplifiers for a variety of applications. This tool enables engineers to create an audio amplifier design in minutes.
Press Release November 9, 2004
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National's LM4859 and LM4931 Boomer audio subsystems provide a wide variety of features for cellular phones and portable applications These audio subsystems give customers a huge feature set in a very compact space. By integrating all of the features that a customer might need into a single package, the LM4859 and LM4931 provide space and system cost savings without sacrificing performance.
Press Release November 2, 2004
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National Semiconductor's LM4666 and LM4668 are high efficiency Boomer Class D audio amplifiers. The LM4666 is a stereo speaker amplifier with selectable gain to give customers flexibility and ease of use in cellular phones and other portable handheld devices. The LM4668 is a switching power amplifier designed for demanding applications in flat panel monitors and televisions and computer sound cards.
Press Release September 13, 2004
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National’s new LM4780/81/82 Overture® audio amplifiers feature quiet fade-in/fade-out mute mode circuitry that gradually brings the sound up or down. These “easy on the ears” transitions enhance the listening experience in compact stereos, high-definition televisions (HDTVs), 5.1 surround sound systems and other consumer electronic equipment.
Press Release March 10, 2004
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National's filter-less high efficiency LM4667 Boomer® audio amplifier is ideal for portable consumer applications such as cellular handsets because of its high efficiency, resulting in less system heat and longer battery life. It is housed in a tiny micro SMD package. The LM4667’s fixed gain reduces pin count and eliminates the need for an output filter when it is located near the speaker, resulting in both space and cost savings.
Press Release January 26, 2004
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National Semiconductor's LM4857 Boomer® stereo audio subsystem for cell phones integrates amplifiers, volume and mixing controls and 3D sound in a miniature micro SMD package.
Press Release November 19, 2003
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National's LM4930 is a single-chip analog audio subsystem for mobile phones and other portable applications that supports both voice and digital audio. It offers designers an easy-to-use structure and three digital interfaces. Integrated onto a single 36-bump micro SMD package, these interfaces include pulse code modulation (PCM) for digital voice data, I2S for digital stereo audio from sources such as MP3, and an I2C interface.
Press Release September 2, 2003
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The LM4906 Boomer® audio amplifier eliminates the bypass capacitor typically connected to the reference voltage pin. National’s new architecture improves power supply rejection ratio (PSRR) and provides very fast turn-on times. These features make the LM4906 ideally suited for applications in small, portable devices such as mobile phones and notebook computers.
Press Release August 18, 2003
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The LM4916’s small size minimizes board space, while the surface mount package maximizes output power in the device. This product is suited for applications in small, portable, one-cell audio applications and consumer devices such as personal CD and mini disc players and electronic toys and games.
Press Release July 28, 2003
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The LM4851/55 have eight different programmable modes with practically no external circuitry for lots of functionality in very little space. Manufacturers can switch between headphone and speaker. These parts are available in 18-bump micro SMD packaging.
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The LM4854 is an integrated Boomer® stereo headphone amplifier and mono speaker amplifier designed for applications in small portable electronic devices such as cellular phones, PDAs and notebook computers.
Press Release June 3, 2002
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The LM4910 and LM4911 are two Boomer® stereo headphone amplifiers with space-saving features that make them ideally-suited for headphone applications in small, portable devices such as mobile phones, PDAs, MP3 players and other portable electronic equipment.
Press Release March 25, 2002
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The LM4894 and LM4895 Boomer® audio amplifiers are optimized for the cellular phone market, delivering the best possible PSRR performance available in the industry.
Press Release August 20, 2001
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The LM4900, LM4892, LM4819, LM4809 and LM4810 are the five new audio products designed for demanding applications in notebook computers, PDAs, cellular phones, MP3 players, information appliances and other battery-powered devices expanding National's popular Boomer® line of audio amplifiers.
Press Release June 12, 2001
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The LM4867 Boomer® amplifier is the world’s first truly noise-free 2.1W stereo amplifier with headphone mode.
Press Release February 26, 2001
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The LM4811 Boomer® audio amplifier is a 105mW stereo headphone amplifier for use in 3V and 5V systems requiring a headphone output and volume control.
Press Release February 5, 2001
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The popular LM4871 Boomer® audio amplifier is now in a leadless leadframe package (LLP), a packaging innovation that will enable more power density in a smaller package for maximum performance and space savings.
Press Release October 23, 2000
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The LM4890 is the next generation of industry-leading Boomer® audio amplifiers for cell phones.
Press Release September 12, 2000
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LM4651/LM4652 a two-chip driver and quad MOSFET amplifier set for high-fidelity Class D subwoofer designs. This chipset provides up to 170 watts of audio power at an excellent 85% efficiency, with smaller space and lower cost.
Press Release March 20, 2000
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A high-efficiency, high-fidelity Class D stereo audio amplifier IC. The LM4663 can output 2.0W per channel of RMS power into a 4O load with less than 0.2% THD+N.
Press Release February 28, 2000
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The LM4836 is a member of the company's line of Boomer® audio power amplifiers for notebook computers, strengthening National's position as the dominant supplier of the most comprehensive audio amplifier solutions for the notebook PC.
Press Release July 12, 1999
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