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National Semiconductor Adds Three High-Performance Precision Amplifiers for Accurate Current Sensing in Industrial, Medical and Telecom Applications

Nov 8, 2006

November 8, 2005 - National Semiconductor Corporation (NYSE:NSM) today expanded its high-performance precision amplifier portfolio with the addition of three high common-mode difference amplifiers. Designed for broad-based industrial, medical and telecommunication applications, these new amplifiers meet the requirements for accurate current sensing measurements in products such as base stations, notebook PCs and sensor controls in industrial applications.

The LMP8275 and LMP8277 high common-mode amplifiers and LMP8276 high common-mode bidirectional amplifier join National’s LMP™ (linear monolithic precision) product family, which detects, amplifies and filters small differential signals in the presence of high common-mode voltages.

“With the addition of these three high-performance precision amplifiers, National Semiconductor continues to provide its customers with the highest-accuracy parts on the market,” said Erroll Dietz, vice president of National’s Amplifier product group.  “Each of the new amplifiers is individually tested at three separate temperatures to ensure we meet the demanding requirements for industrial, medical and telecom applications with very low offset voltage and drift.”

Key Technical Features
The LMP8275/6/7 are fixed-gain differential amplifiers with a -2V to 27V input common-mode voltage range and a supply voltage range of 4.75V to 5.5V. The amplifiers’ guaranteed tri-temperature testing ensures a low temperature coefficient for offset voltage drift (TCVos).  

The gain of the LMP8275 and LMP8276 is fixed at 20, allowing them to amplify small signals and drive analog-to-digital converters (ADC) to full scale. The LMP8277’s gain is fixed at 14.  The guaranteed wide common-mode voltage range (CMVR) of -2V to 27V provides design flexibility.  An extended CMVR of -2V to 36V is also specified for these three products. 

The very low offset voltage (less than 2 millivolts) and offset drift (less than 30 microvolts/degrees Celsius) of these products allow for accurate differential signal conditioning of small signals, with minimal voltage offset error through the entire temperature range.  Additionally, the extended operating temperature range of -40 degrees Celsius to +125 degrees Celsius ensures these amplifiers can be used in extreme conditions, such as those found in industrial applications.

Pricing and Availability
The amplifiers are available in SOIC-8 packaging. The LMP8275 and LMP8277 are priced at $1.05 each and the LMP8276 is priced at $1.15 each, all in 1,000-unit quantities. More information and easy-to-order samples are available at http://www.national.com/pf/LM/LMP8275.html
, http://www.national.com/pf/LM/LMP8276.html and http://www.national.com/pf/LM/LMP8277.html. A large selection of amplifiers is supported by National’s Amplifiers Made SimpleSM, Signal-Path Designer and Active Filter Designer WEBENCH® online design tools.  To explore these solutions, visit http://webench.national.com. To learn more about designing with amplifiers, visit National’s library of online seminars.

Note to editors:  To view a high-resolution, downloadable photo of these products, visit National's http://www.national.com/company/pressroom/gallery/oa.html.

About National Semiconductor
National Semiconductor, the industry's premier analog company, creates high-value analog devices and subsystems.  National's leading-edge products include power management circuits, display drivers, audio and operational amplifiers, communication interface products and data conversion solutions. National's key analog markets include wireless handsets, displays and a variety of broad electronics markets, including medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, California, National reported sales of $1.91 billion for fiscal 2005, which ended May 29, 2005.  Additional company and product information is available at www.national.com
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