National Semiconductor Introduces Industry's First Stereo Headphone Amplifier With Digital Up/Down Volume Control in Leadless Leadframe Package.
Business Editors/Technology Writers
SANTA CLARA, Calif.--(BUSINESS WIRE)
Feb. 5, 2001 - National Semiconductor Corporation (NYSE NYSE
See: New York Stock Exchange :NSM (Network and System Management) Running and controlling the networks and computer systems in an enterprise. See network management. ) today announced the LM4811 Boomer(R) audio amplifier, a 105mW stereo headphone amplifier for use in 3V and 5V systems requiring a headphone output and volume control. National's LM4811 is excellent for cellular phones, PDAs, MP3, DVD DVD: see digital versatile disc.
in full digital video disc or digital versatile disc
Type of optical disc. The DVD represents the second generation of compact-disc (CD) technology. and CD players, Internet appliances and notebook computers. The LM4811 will be shown at the Wireless Portable Symposium and Exhibition from February 13 - 15, 2001 in National's Booth No. 809 at the San Jose Convention Center in San Jose, California San Jose (IPA: /ˌsænhoʊˈzeɪ/) is the third-largest city in California, and the tenth-largest in the United States. It is the county seat of Santa Clara County. .
"The LM4811 takes efficiency to the next level by offering the convenience of integrated up/down digital volume control in 16 discrete steps with 3dB step increments," said Hector Hernandez, National Semiconductor's audio products marketing manager. "National listened to customers' needs and responded with the highly customized LM4811, providing customers with a unique product in a very small leadless leadframe package (LLP) which allows 70% board space savings over competitive solutions."
Expanding National's Boomer portfolio, the LM4811 features a push button up/down volume control without the high costs related to a software solution. It sets an amplifier's gain from +12dB to -33dB in 16 discrete steps using a two-wire interface. Additionally, the LM4811 provides 60dB at 217 Hz Power Supply Rejection Ratio In electronics, Power supply rejection ratio or PSRR is a term widely used in op-amp datasheets; used to describe the amount of noise from a power supply that the particular op-amp can reject. References (PSRR PSRR Power Supply Rejection Ratio
PSRR Product and Support Requirements Request (Sprint)
PSRR Preliminary System Requirements Review
PSRR Primary Shadow RTO.k Replication
PSRR Power Supply Ripple Rejection ), excellent for GSM cellular phone applications. The LM4811 also includes click and pop circuitry, and delivers 40mW of power at 3.3V into 16 ohms and less than 1% THD.
Pricing and Availability
The LM4811 is available now in 10-pin LLP and MSOP MSOP Mini Small Outline Package
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MSOP Minimum Sum-Of-Products packaging. The LM4811 is priced at $0.85 in the LLP package and at $0.75 in the MSOP package, each in 1000-unit quantities. For more information on the LM4811 amplifier, visit National's World Wide Web site at http://www.national.com/pf/LM/LM4811.html, or contact National's Design Support Group at 1-800-272-9959. To view a high-resolution downloadable photo of the LM4811, visit National's photo gallery at http://www.national.com/company/pressroom/gallery/audio.html.
About National Semiconductor
National Semiconductor is the premier analog company driving the information age. Combining real-world analog and state-of-the-art digital technology, the company is focused on the fast growing markets for wireless handsets; information appliances; information infrastructure; and display, imaging and human interface technologies. With headquarters in Santa Clara, California Santa Clara, California (IPA: /ˌsæntəˈklærə/) , founded in 1777 and incorporated in 1852, is a city in Santa Clara County, in the U.S. state of California. , National reported sales of $2.1 billion for its last fiscal year and has about 10,500 employees worldwide. Additional company and product information is available on the World Wide Web at www.national.com.
Boomer is a registered trademark of National Semiconductor Corporation.