July 22, 2002 – National Semiconductor Corporation(NYSE:NSM) today announced three new LMH amplifier products for the high-speed analog market fabricated on National's industry-leading VIP10™ manufacturing process. These products have improved AC performance, low noise, low power and large signal bandwidth for high-speed applications in video cameras, xDSL modems and set-top boxes.
“National Semiconductor continues to create high-performance products for the high-speed amplifier market,” said Jeff Hooker, marketing manager for National’s amplifier product group. “National's LMH6628, LMH6715 and LMH6718 exceed all previous specifications, giving customers additional performance and making these amplifiers suitable for new, faster applications.”
LMH6628
National's LMH6628, voltage feedback amplifier is an improved, lower power version of the CLC428. It is the lowest-noise, 300MHz, 550V/usec slew rate, dual amplifier on the market. Its 2nV/ÖHz noise figure makes it ideal for receiving small signals over long, twisted pair telephone lines such as VDSL applications. The fast settling time of 12ns to 0.1% and low THD of –65dBc make it a good fit for 10-bit data acquisition systems. The ability to drive heavy capacitive loads also makes the LMH6628 suitable for directly driving analog-to-digital converters. This allows the elimination of an additional buffer stage in the front end of many receiver applications.
LMH6715
National's LMH6715 current feedback dual video amplifier is a faster version of the CLC412. It has excellent key video specifications with differential gain and phase (DG/DP) of only 0.02 percent/0.02 degrees. The LMH6715’s large signal, 3dB bandwidth of 170 MHz at Av=+2 for a 4V PP output and 0.1dB gain flatness to 100MHz make it well suited for high-end video systems. It is able to drive 8V PP from a 10V supply, an improvement over the CLC412’s output dynamic range by over 1V. The improved AC parameters make the LMH6715 a good fit for many high-end consumer video applications such as video distribution systems, video cameras, video cable driving, multimedia systems and HDTV.
LMH6718
National's LMH6718 dual programmable gain buffer (PGB) is an enhanced version of the CLC5632. It has an improved output stage and can deliver 50 percent more current (200mA) than the CLC5632 while consuming less quiescent power (2.6mA). The LMH6718 PGB incorporates the normally external Rf/Rg resistors on die, allowing it to easily be programmed to a gain of Av= -1, +1, +2 without external components. This feature lowers parts count and reduces layout area, but also shields sensitive input noise nodes that are typically exposed on the board.
The output stage of the LMH6718 allows it to drive high capacitive, low resistive loads with minimum distortion (-85/-89dBc HD2/HD3, 2Vpp, 1MHz, RL=100 ohms at 5V) while maximizing output voltage swing. The LMH6718 provides 110MHz bandwidth (Av=+2V/V) and 400V/us slew rates on a single +5V supply and 130MHz-600V/us on dual +/-5V supplies. Specific applications targeted for the LMH6718 are dual, single-ended applications such as video line driving through coaxial cable and signal-boosting applications such as driving single-ended transformers for twisted pair.
VIP10 Process
Developed in National's wafer fabrication site in Arlington, Texas, VIP10 is a high-speed, dielectrically-isolated, complementary bipolar IC process that utilizes deep trench technology on a bonded wafer for complete dielectric isolation and optimal high-speed amplifier performance. Trench technology with bonded wafers helps minimize parasitic capacitance for optimal power-to-bandwidth performance, lower distortion and decreased die size. VIP10 is the process technology that allows National to design the most power-efficient, performance-oriented high-speed amplifiers on the market today.
National's LMH6628, LMH6715 and LMH6718 were all developed using the VIP10 process and are the first replacement parts for the CLC amplifiers portfolio. Migration of other key CLC replacements will continue over the next year and be completed by June 2003.
Pricing and Availability
The LMH6628 is available now in 8-pin SOIC packaging, and is priced at $1.98. The LMH6715 is available in 8-pin SOIC packaging, and is priced at $1.69. The LMH6718 is available in 8-pin SOIC packaging and is priced at $1.88. All three product prices are for 1,000-unit quantities. More information on these products is available at http://www.national.com/pf/LM/LMH6628.html, http://www.national.com/pf/LM/LMH6715.html, and http://www.national.com/pf/LM/LMH6718.html. For more information on National’s amplifier products, visit http://www.national.com/appinfo/amps/. To view a high-resolution downloadable photo of these products, visit National's photo gallery at http://www.national.com/company/pressroom/gallery/oa.html. For a cross-reference chart that shows the transfer of the most popular CLC operational amplifier devices to the new LMH devices, visit http://www.national.com/appinfo/amps/0,2175,1005,00.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; displays; information infrastructure, and information appliances. With headquarters in Santa Clara, California, National reported sales of $1.5 billion for its most recent fiscal year and has about 10,000 employees worldwide. Additional company and product information is available on the World Wide Web at www.national.com.
