'news/National Semiconductor' related articles 10

  1. 2008/02/14 National Semiconductor’s Quad Equalizer Supports Industry’s Highest Data Rates with Lowest Power Consumption (October 22, 2007)
  2. 2008/02/14 National Semiconductor Introduces Industry’s First High-Power-Density, Self-Synchronizing Buck Regulators (November 5, 2007)
  3. 2008/02/14 National Semiconductor Introduces Highest-Accuracy Integrated Micropower Comparator Reference (October 31, 2007)
  4. 2008/02/14 National Semiconductor Introduces Industry’s First Common-Anode, Current-Mode, High-Brightness LED Driver with PWM Dimming (October 24, 2007)
  5. 2008/02/14 National Semiconductor Announces Highly Integrated, High-Brightness LED Drivers with Wide Input Voltage Range for Industrial and General Illumination Applications (October 22, 2007)
  6. 2008/02/13 National Semiconductor Delivers Industry’s First High-Speed, Continuous-Time Sigma-Delta Analog-to-Digital Converter (January 28, 2008)
  7. 2008/02/13 National Semiconductor Introduces Industry’s Lowest-Noise Audio Buffer (January 21, 2008)
  8. 2008/02/13 National Semiconductor Extends Industry-Leading High-Fidelity Audio Family with New 200V Power Amplifier Input Stages (January 15, 2008)
  9. 2008/02/13 National Semiconductor Introduces Industry’s First High-Voltage, Monolithic Two-Switch Forward DC-DC Regulator (December 17, 2007)
  10. 2008/02/13 National Semiconductor’s Low-Power, LVDS 2x2 Crosspoint Switch with Equalization and Pre-Emphasis Delivers Industry-Leading Signal Integrity(November 19, 2007)
DS64EV400 Equalizer from National’s PowerWise Energy-Efficient Product Family Compensates Media Losses for up to 10 Gbps Data Transfers While Consuming Only 94 mW per Channel

October 22, 2007 –
A new programmable quad equalizer from National Semiconductor Corporation (NYSE:NSM) extends the reach of high-speed serial buses up to 10 Gbps data transmission rates, while consuming only 94 mW per channel. The DS64EV400, from National’s PowerWise® energy-efficient product family, provides high-speed signal transmission over backplanes and cables used in storage area networking (SAN), communications infrastructure and automated test equipment (ATE).

The DS64EV400 compensates for transmission medium losses and reduces deterministic jitter for four data transmission channels. The device provides 20 dB of boost to equalize up to 10m of CAT5 cable, up to 40 inches of FR-4 printed circuit board (PCB) at data transmission rates up to 6.4 Gbps and up to 30 inches of FR-4 at data rates up to 10 Gbps -- with only 0.175 units interval (UI) of residual jitter at the equalizer output. National fabricates this signal-conditioning part on its proprietary silicon-germanium (SiGe) BiCMOS-8 process technology, which provides high performance-to-power ratios for high-speed interface devices. Along with featuring the lowest power at this performance level, inactive channels can be automatically shutdown for further power savings of 85 percent per channel.

The quad equalizer’s features make it easy to use with field-programmable gate arrays (FPGAs) and transmission media. Each equalizer channel has eight equalization levels simultaneously set by three control pins, or individually programmed through a serial System Management (SM) Bus. The DS64EV400 supports both AC and DC-coupled data paths for long-run-length PRBS-31 data patterns and balanced 8b/10b codes. It uses differential current-mode logic (CML) inputs and outputs, and features 8 kV of electrostatic discharge (ESD) protection. Additionally, the equalizer includes a loss-of-signal (LOS) detect for each channel, operates over the full -40 degrees C to 85 degrees C temperature range and is powered from either a 2.5V or 3.3V supply.

National also is introducing the DS32EV400, a programmable quad equalizer optimized for applications up to 3.2 Gbps that includes many of the same features as the DS64EV400. These devices are the latest additions to National’s growing family of signal-conditioning equalizers, which include the DS38EP100 and DS80EP100 power-saver equalizers, DS16EV5110 video cable equalizer, DS25BR110 LVDS equalizer, DS40MB200 dual mux-buffer, and DS15BA101 and DS15EA101 cable extender chipset.

About National’s Interface Portfolio
National Semiconductor, the LVDS and CML technology innovator and market leader, offers a wide range of interconnect solutions that transfer high-speed digital signals using world-class analog technology. These solutions help system designers develop high-performance applications in a variety of markets, including communication and industrial systems. The products feature high reliability, low power and low noise, as well as dramatic systems savings in cable and connector costs. National Semiconductor is the world’s largest supplier of high-speed LVDS products, according to Databean’s 2006 Analog IC Market Share survey. For more information on National’s interface products, visit
http://www.national.com/appinfo/interface/.

Pricing and Availability
The DS64EV400 (6.4 Gbps to 10 Gbps) and DS32EV400 (1 Gbps to 3.2 Gbps) are available now in 7 mm by 7 mm, 48-pin leadless LLP® packages and are priced at $16 and $13, respectively, both in 1,000-unit quantities. For more information on the DS64EV400 or to order samples and an evaluation board, visit
 http://www.national.com/pf/DS/DS64EV400.html. For more information on the DS32EV400 or to order samples and an evaluation board, visit http://www.national.com/pf/DS/DS32EV400.html.

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

About National’s PowerWise Brand
National’s PowerWise brand reflects the company’s energy-efficient product portfolio.  It signifies products with outstanding performance-to-power at the component level, as well as products that provide an outstanding, energy-efficient solution when coupled with other National parts.  National’s PowerWise family of products features energy-efficient power management, operational amplifiers, interface and data conversion products.  For more information about National’s PowerWise brand, visit:
http://www.national.com/powerwise.

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, interface products and data conversion solutions. National's key analog markets include wireless handsets, displays, communications infrastructure, medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, Calif., National reported sales of $1.93 billion for fiscal 2007, which ended May 27, 2007. Additional company and product information is available at
www.national.com.

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November 5, 2007 - National Semiconductor Corporation (NYSE:NSM) today introduced a new line of buck switching regulators that are the first in the industry to feature high power density and self-synchronization.  These 10 full-featured, synchronous buck regulators provide high-efficiency DC-DC power conversion for point-of-load power supply designs in applications such as communication, data storage, industrial and automotive.  Part of National’s PowerWise® energy-efficient product family, the highly integrated regulators feature a variety of input voltages and output currents, and offer a combination of power sequencing, adjustable switching frequency and clock synchronization options. 

The new line of LM201xx and LM202xx synchronous buck regulators includes 2A, 3A, 4A and 5A output current devices.  Each regulator integrates two switching MOSFETs and utilizes an externally compensated peak current-mode control loop, providing superior load transient response in low duty cycle applications.  The external compensation allows the performance to be optimized for the output capacitor and inductor.  With current-mode control, just two external components are needed for compensation.  The ability of the 3A and 4A clock synchronization devices to self-synchronize when in out-of-phase operation reduces input capacitance and voltage ripple in power supply designs.

National offers a downloadable power supply design tool for the new low voltage synchronous buck regulators that eliminates the need for tedious hand calculations.  The tool, in a Microsoft Excel spreadsheet format, calculates component values based on user-specified design parameters to quickly create a complete power supply design.  The design tool allows the design engineer to quickly analyze the control loop response, thermal performance and efficiency of the design.

Technical Features of the New Low-Voltage Buck Regulators
Offered in a 16-pin thermally enhanced TSSOP package, the nine low-voltage buck regulators operate with an input voltage range from 2.95V to 5.5V and deliver up to 5A of continuous output current.  Both fixed and adjustable switching frequency versions are available.

Each buck regulator has a precise internal voltage of 1.5 percent accuracy from -40 degrees C to 125 degrees C while providing excellent line and load regulation.  They include a precision enable pin that allows accurate setting of the turn-on threshold and sequencing of the turn-on of multiple devices, eliminating the need for an external voltage supervisor chip.  Also included is a power good indicator that regulates the output voltage within tolerance and can sequence loads that have an enable input.

A tracking and soft-start feature allows the design engineer to set the output to accurately track an external supply, as well as provide a controlled voltage ramp to protect loads against in-rush current that could cause latch-up.  The monotonic start-up into pre-biased load feature prevents the possibility of latch-up in field programmable gate array (FPGA) and application-specific integrated circuit (ASIC) applications.

The buck regulators enhance system reliability by using an accurate current limit to provide robust protection for long-term hard shorts while minimizing the inductor size.  Over-voltage and under-voltage events are monitored at the output voltage.

The low-voltage LM20123, LM20124 and LM20125 buck regulators feature fixed frequencies of 1.5 MHz at 3A, 1 MHz at 4A or 500 KHz at 5A for enabling the smallest solution size.  For more information on these products, to order samples and an evaluation board, or to download the power supply design tool, visit http://www.national.com/pf/LM/LM20123.html, http://www.national.com/pf/LM/LM20124.html and http://www.national.com/pf/LM/LM20125.html.

The low-voltage LM20143, LM20144 and LM20145 buck regulators feature adjustable frequencies for maximum design flexibility.  For more information on these products, to order samples and an evaluation board, or to download the power supply design tool, visit http://www.national.com/pf/LM/LM20143.html, http://www.national.com/pf/LM/LM20144.html and http://www.national.com/pf/LM/LM20145.html.

The low-voltage LM20133 and LM20134 buck regulators provide clock synchronization for synchronization to an external clock source.  For more information on these products, to order samples and an evaluation board, or to download the power supply design tool, visit http://www.national.com/pf/LM/LM20133.html and http://www.national.com/pf/LM/LM20134.html.

The low-voltage LM20154 buck regulator features out-of-phase clock output for current sharing or out-of-phase operation.  For more information on these products, to order samples and an evaluation board, or to download the power supply design tool, visit http://www.national.com/pf/LM/LM20154.html.

Technical Features of the New High Voltage Buck Regulator
The high-voltage LM20242 buck regulator, offered in a 20-pin TSSOP package with exposed pad, operates with an input voltage range from 4.5V to 36V and delivers up to 2A of continuous output current.  The LM20242 features adjustable frequency from 250 kHz to 1 MHz for maximum design flexibility.  For more information on the LM20242 or to order samples and an evaluation board, visit http://www.national.com/pf/LM/LM20242.html
.

About National’s PowerWise Brand
National’s PowerWise brand reflects the company’s energy-efficient product portfolio.  It signifies products with outstanding performance-to-power at the component level, as well as products that provide an outstanding, energy-efficient solution when coupled with other National parts.  National’s PowerWise family of products features energy-efficient power management, operational amplifiers, interface and data conversion products.  For more information about National’s PowerWise brand, visit: http://www.national.com/powerwise
.

About National’s Power Management Products 
National solves power management design problems in space- and energy-constrained applications from feature-rich handheld devices through large line-powered systems. From the novice power designer to the power expert, National’s products, people and design tools enable customers to design green-powered systems with complex power supplies in the shortest amount of time. High-performance products include switching regulators such as National’s flagship SIMPLE SWITCHER® family, and application-specific products including white-LED drivers and Power-over-Ethernet controllers. More information about National’s power management products is available at http://www.national.com/power.

Pricing and Availability
National’s 10 new synchronous buck regulators are available now.  Prices for the products range from $2.30 to $3 in 1,000-unit quantities.

Note to editors:  To view a high-resolution downloadable photo of these products, visit National's photo gallery at http://www.national.com/company/pressroom/gallery/power.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, 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, Calif., National reported sales of $1.93 billion for fiscal 2007, which ended May 27, 2007.  Additional company and product information is available at http://www.national.com
.

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October 31, 2007 – National Semiconductor Corporation (NYSE:NSM) today introduced a new low-power precision comparator with integrated 2.048V reference that provides adjustable hysteresis for the highest-accuracy signal detection in power supply and battery monitors, sensor interface and threshold detectors. The LMP7300 is the latest addition to the company’s PowerWise® energy-efficient product family.

The LMP7300’s adjustable hysteresis improves the noise immunity of the comparator and prevents false readings by providing engineers the flexibility to develop precise bidirectional threshold trip points that are positive, negative, symmetric or asymmetric. In addition, the two threshold trip points are independent of one another to further simplify designs without interdependency constraints.

The comparator’s low-offset voltage of 300 uV and low supply current of 10 uA make it well-suited for precision battery-operated systems. It has a wide supply voltage range of 2.7V to 12V for use in 3.3V, 5V, and plus and minus 5V applications. A 2.048V reference voltage with 0.25 percent maximum error provides a precise input monitoring voltage reference level. The comparator’s propagation delay is less than 5 microseconds to enable fast, precise, low-power signal detection. 
 
Built on National’s proprietary VIP50 BiCMOS process technology, the LMP7300 is the latest addition to the company’s precision and low-voltage, low-power amplifier families. These amplifiers dramatically improve system accuracy and power consumption.

About National’s Amplifier Portfolio
Specializing in high-performance amplifiers and comparators, National Semiconductor offers a complete portfolio of op amps addressing the high-speed, precision, low-voltage, and low-power markets with products ranging from building-block ICs to application-specific standard products (ASSPs). The company has a long history of setting industry standards in amplifiers and continues this trend with product releases on National’s advanced VIP10 bipolar and VIP50 BiCMOS processes. National also leads the industry in packaging technology with its revolutionary Silicon Dust™ and micro SMD packaging technologies. For more information on National’s amplifier products, visit amplifiers.national.com.

Pricing and Availability
The LMP7300 is available now in an 8-pin SOIC package for $1.05 in 1,000-unit quantities. For more information and easy-to-order samples, visit
http://www.national.com/pf/LM/LMP7300.html. National’s Amplifiers Made SimpleSM WEBENCH® online design tool supports a large selection of amplifiers.  To explore these solutions, visit http://webench.national.com.  To learn more about designing with amplifiers, visit our library at http://www.national.com/onlineseminar/#amps.  

Note to Editors: To view a high-resolution downloadable photo of this product, visit National's photo gallery

About National’s PowerWise Brand
National’s PowerWise brand reflects the company’s energy-efficient product portfolio.  It signifies products with outstanding performance-to-power at the component level, as well as products that provide an outstanding, energy-efficient solution when coupled with other National parts.  National’s PowerWise family of products features energy-efficient power management, operational amplifiers, interface and data conversion products.  For more information about National’s PowerWise brand, visit: http://www.national.com/powerwise
.

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, interface products and data conversion solutions. National's key analog markets include wireless handsets, displays, communications infrastructure, medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, Calif., National reported sales of $1.93 billion for fiscal 2007, which ended May 27, 2007. Additional company and product information is available at www.national.com
.

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New LED Driver from National’s PowerWise Energy-Efficient Product Family Drives Luminus’ Ultra-High-Current PhlatLight LEDs

LEDS 2007, SAN DIEGO, Calif. – October 24, 2007 -
National Semiconductor Corporation (NYSE:NSM) today introduced the industry’s first common-anode, current-mode, high-brightness light-emitting diode (LED) driver with pulse-width modulation (PWM) dimming.  The LM3433, a member of National’s PowerWise® energy-efficient product family, drives high-power, high-brightness LEDs in backlighting, projector and solid-state lighting applications.

National will show its LM3433 LED driver with Luminus Devices’ PhlatLight™ LED in National’s booth #26 at the LEDs 2007 conference in San Diego from Oct. 24 to 27.  On Oct. 26 at the same conference, Luminus Devices will demonstrate its LED and National’s driver at 2:45 p.m during session six, “Entertaining in a New Light”.

National’s LM3433 LED driver opens the way for high-reliability LEDs to be used in large-screen liquid crystal display (LCD) television (TV) backlighting applications where a common anode approach offers a thermal advantage.  In another example, LEDs can be used in today’s shrinking “pocket projector” designs for a wider color gamut, higher reliability and longer life expectancy than the ultra-high performance (UHP) lamps used today.

Luminus’ PhlatLight LEDs are a new class of LED for very high-brightness applications where a point source of light is needed.  The PhlatLight RGB LED demonstration at National’s booth will be capable of producing over 3,000 white lumens.  “PhlatLight LEDs are being designed into a number of display and lighting applications,” said John Langevin, vice president of sales and marketing at Luminus.  “National’s LM3433 driver provides a more complete solution for our customers, enabling use at the intended high performance levels that the PhlatLight chipsets were designed for.”

Technical Features of National’s LM3433 LED Driver
National’s LM3433 is a constant on-time DC-DC buck (step-down) constant-current regulator.  It outputs a negative constant current for lighting high-power, high-brightness LEDs.  The negative voltage option allows the anode of the LED to be tied directly to the ground-referenced chassis for maximum heat sink efficacy.  The short constant-on-time architecture allows the use of small external passive components and no output capacitor.  Two current control modes modulate LED brightness.  An analog current control input is provided so the LM3433 can be adjusted to compensate for LED manufacturing variations.  The other current control is a logic-level dimming input for PWM control of LED brightness.  The PWM functions by shorting out the LED with a parallel switch, allowing high PWM dimming frequencies up to 40 KHz.  Additional features include thermal shutdown, VCC under-voltage lockout and logic-level shutdown mode. 

The LM3433 is offered in a 24-pin LLP® package.  For more information on the LM3433 or to order samples, visit http://www.national.com/pf/LM/LM3433.html.

About National’s Power Management Products
National solves power management design problems in space- and energy-constrained applications from feature-rich handheld devices through large line-powered systems. From the novice power designer to the power expert, National’s products, people and design tools enable customers to design green-powered systems with complex power supplies in the shortest amount of time. High-performance products include switching regulators such as National’s flagship SIMPLE SWITCHER® family, and application-specific products including white-LED drivers and Power-over-Ethernet controllers. More information about National’s power management products is available at http://www.national.com/power
.

Availability and Pricing
Available now, the LM3433 is priced at $2.25 each in 1,000-unit quantities.

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

About National’s PowerWise Brand
National’s PowerWise brand reflects the company’s energy-efficient product portfolio.  It signifies products with outstanding performance-to-power at the component level, as well as products that provide an outstanding, energy-efficient solution when coupled with other National parts.  National’s PowerWise family of products features energy-efficient power management, operational amplifiers, interface and data conversion products.  For more information about National’s PowerWise brand, visit: http://www.national.com/powerwise
.

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, interface products and data conversion solutions. National's key analog markets include wireless handsets, displays, communications infrastructure, medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, Calif., National reported sales of $1.93 billion for fiscal 2007, which ended May 27, 2007. Additional company and product information is available at http://www.national.com./

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Two New LED Drivers from National’s PowerWise Energy-Efficient Product Family Feature Constant Current, Low Feedback Voltage

LEDs 2007, SAN DIEGO, Calif. – October 22, 2007 -
National Semiconductor Corporation (NYSE:NSM) today added two new light-emitting diode (LED) drivers to its PowerWise® energy-efficient product family.  National’s LM3401 and LM3405A LED drivers power 1W to 5W, high-brightness LEDs found in industrial and automotive applications as well as general illumination applications such as solid state and signage.  Each offers a wide input voltage range and provides a constant current to regulate the LED brightness and low feedback voltage to minimize power dissipation.

Featuring a voltage range from 4.5V to 35V, National’s high-efficient LM3401 LED driver includes a scalable current drive of greater than 3A and a 100 percent duty cycle.  A low feedback voltage of 0.2V and accuracy within 3 percent provides a constant current to provide constant color output from an LED. 

The LM3405A LED driver features a voltage range from 3V to 22V and is able to regulate from a loosely coupled 12V AC rail found in industrial and commercial lighting applications.  The small SOT-23 package allows LEDs to be placed into small-form factor light bulbs to offer higher efficiency versus the traditional halogen and incandescent sources for illumination.

National’s two new LED drivers will be shown in National’s booth #26 at the LEDs 2007 conference in San Diego from Oct. 24 to 27.
 
Technical Features of the LM3401 LED Driver
The LM3401 is a high-efficiency hysteretic PFET switching controller that provides a high-performance, constant current drive to a string of LEDs resulting in a constant color output.  An adjustable hysteretic window allows for flexibility in component selection and overall design simplicity.  No external compensation is required.  The regulated LED current is sensed and is compared to the reduced feedback of 0.2V for current sensing which eliminates the need for an output capacitor.  Offered in an 8-pin mini SOIC package, the LM3401 has programmable over current voltage protection and a DIM input pin for PWM inputs to control dimming.  For more information on the LM3401 or to order samples and an evaluation board, visit http://www.national.com/pf/LM/LM3401.html

Technical Features of the LM3405A LED Driver
The new LM3405A extends the voltage range of National’s previously announced LM3405 up to 22V.  Offered in a tiny 6-pin SOT-23 package, the LM3405A constant-current buck regulator delivers up to 1A of current to drive 3W or 5W LEDs.  With a 0.2V reference voltage for constant-current feedback control, internal compensation and a fixed 1.6 MHz switching frequency, the LM3405A provides a simple, highly-efficient solution for driving LEDs.  The LM3405A also includes an EN/DIM pin for pulse-width-modulation (PWM) dimming.  The LM3405A drives general illumination for industrial and commercial lighting applications from the 12V AC and 12V DC rail. 
For more information on the LM3405A and LM3405 or to order samples and an evaluation board, visit http://www.national.com/pf/LM/LM3405A.html
and http://www.national.com/pf/LM/LM3405.html.

For more information on National’s lighting solutions, visit http://www.national.com/led.

About National’s Power Management Products
National solves power management design problems in space- and energy-constrained applications from feature-rich handheld devices through large line-powered systems. From the novice power designer to the power expert, National’s products, people and design tools enable customers to design green-powered systems with complex power supplies in the shortest amount of time. High-performance products include switching regulators such as National’s flagship SIMPLE SWITCHER® family, and application-specific products including white-LED drivers and Power-over-Ethernet controllers. More information about National’s power management products is available at http://www.national.com/power.

Availability and Pricing
Available now, the LM3401 is priced at 75 cents each and the LM3405A is $1.30 in 1,000-unit quantities.

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

About National’s PowerWise Brand
National’s PowerWise brand reflects the company’s energy-efficient product portfolio.  It signifies products with outstanding performance-to-power at the component level, as well as products that provide an outstanding, energy-efficient solution when coupled with other National parts.  National’s PowerWise family of products features energy-efficient power management, operational amplifiers, interface and data conversion products.  For more information about National’s PowerWise brand, visit: http://national.com/powerwise
.

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, interface products and data conversion solutions. National's key analog markets include wireless handsets, displays, communications infrastructure, medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, Calif., National reported sales of $1.93 billion for fiscal 2007, which ended May 27, 2007. Additional company and product information is available at http://www.national.com.

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National’s PowerWise ADC Consumes 30 Percent Less Power than Competitive Devices

January 28, 2008 –
National Semiconductor Corporation (NYSE:NSM) today announced the availability of the industry’s first high-speed, continuous-time sigma-delta(1) (CTSD) analog-to-digital converter (ADC). The ADC12EU050, a member of National’s PowerWise® energy-efficient family, is an 8-channel, 12-bit, 50 mega-samples per second (MSPS) ADC that offers an alias-free sample bandwidth up to 25 MHz, while consuming 30 percent less power (350 mW) than competing pipeline devices. This low-power breakthrough enables manufacturers to extend battery life and reduce heat in portable medical ultrasound and industrial imaging equipment.

CTSD technology has been the subject of university and industry research for more than 15 years. With the introduction of the ADC12EU050, National is the first manufacturer to successfully transition CTSD technology from the research lab to the production line. National plans to expand its CTSD ADC product offering for imaging, communications, and test and measurement applications that require high dynamic performance at extremely low power. The continuous-time architecture greatly simplifies system design as it allows the integration of other signal-path functions, such as signal conditioning, while incorporating anti-aliasing filtering into the ADC. 

The ADC12EU050’s innovative CTSD architecture offers many advantages compared to traditional pipeline architectures:

  • Lower power dissipation  
  • Integrated low-pass, brickwall anti-aliasing filter that blocks out-of-band signals from aliasing down in-band  
  • Easy-to-drive, purely resistive input stage that does not require a sample-and-hold amplifier  
  • Integrated phase-locked loop (PLL) and voltage-controlled oscillator (VCO) that performs clock conditioning, enabling system designers to use inexpensive clock sources  
  • On-chip instant-overload recovery (IOR) circuitry that recovers from saturation within one clock cycle, if the input exceeds pre-determined limits

Key Technical Features – ADC12EU050 CTSD ADC
The ADC12EU050 12-bit, ultra-low-power, octal CTSD ADC offers an alias-free sample bandwidth up to 25 MHz and a conversion rate of 40 MSPS to 50 MSPS. The device features 68 dB of signal-to-noise and distortion (SINAD) and a signal-to-noise ratio (SNR) of 70 decibels full scale (dBFS). Operating from a 1.2V supply, it consumes 44 mW per channel at 50 MSPS for a total power consumption of only 350 mW. The ADC12EU050 reduces interconnection complexity by using programmable serialized outputs, which offer industry-standard low-voltage differential signaling (LVDS) and scalable low-voltage signaling (SLVS) modes. The ADC12EU050 operates over the -40 degrees C to 85 degrees C temperature range and is supplied in a 10 mm by 10 mm, 68-pin LLP® package.

About National’s Data Conversion Portfolio
National Semiconductor is a leading provider of high-speed and low-power data converters. National’s portfolio is rich in differentiated products that offer a unique set of value-added features, including the fastest 8-bit analog-to-digital converters (ADCs) with speeds up to 3 GSPS, 12- and 14-bit ADCs featuring high input bandwidth of 1.1 GHz at speeds up to 170 MSPS, and the easiest-to-use family of pin- and function-compatible 8-, 10-, 12- and 14-bit low-power ADCs and digital-to-analog converters (DACs) with speeds up to 1 MSPS. National’s PowerWise data converter products offer the optimal performance at the lowest power consumption for communications infrastructure, medical imaging, test and measurement, and other applications. For more information about National’s data conversion products, visit www.national.com/adc.

Pricing and Availability
Samples of the ADC12EU050 are available now, with high-volume quantities scheduled to be available in third quarter 2008. The ADC12EU050 is priced at $64 in 1,000-unit quantities. For more information and easy-to-order samples and evaluation boards, visit
http://www.national.com/pf/DC/ADC12EU050.html.

Note to editors: To view a high-resolution downloadable photo of this product, visit National's photo gallery.

About National’s PowerWise Brand
National’s PowerWise brand reflects the company’s energy-efficient product portfolio.  It signifies products with outstanding performance-to-power at the component level, as well as products that provide an outstanding, energy-efficient solution when coupled with other National parts. National’s PowerWise family of products features energy-efficient power management, operational amplifiers, interface and data conversion products. For more information about National’s PowerWise brand, visit: http://www.national.com/powerwise.

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, interface products and data conversion solutions. National's key analog markets include wireless handsets, displays, communications infrastructure, medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, Calif., National reported sales of $1.93 billion for fiscal 2007, which ended May 27, 2007. Additional company and product information is available at http://www.national.com/.

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January 21, 2008 – A new buffer from National Semiconductor Corporation (NYSE: NSM) delivers the industry’s lowest noise and harmonic distortion for professional audio applications. Part of National’s high-fidelity LME™ audio amplifier family, the LME49600 produces the necessary output current to drive multiple low-impedance headphones and the voltage swing to drive several high-impedance headphones. Additionally, the buffer is well-suited for a wide range of other applications, including line drivers, analog-to-digital converter (ADC) input drivers, low-noise and wide-frequency voltage regulators, and it can also drive the headphone amplifier output stage in mixer consoles as well as capacitive loads in low-power audio amplifiers.

The LME49600’s high-fidelity specifications ensure that it can respond to highly dynamic inputs, accurately reproducing these signals without degrading them by adding distortion. The device delivers 180 MHz bandwidth, a high slew rate of 2000 V/us and has 2.6 nV/rtHz input referred voltage noise density. In a closed-loop configuration with National’s LME49710 single operational amplifier (op amp), the total harmonic distortion plus noise (THD+N) is a vanishingly low 0.00003 percent. Combining the LME49600’s +/- 250 mA output current capacity with the LME49710 and an LM4040 low-noise bandgap reference produces a very high-performance, low-noise, wide-bandwidth, audiophile quality, voltage regulator.

National engineers developed the LME49600 using the company’s proprietary VIP3 process technology. The high-voltage, high-performance, complementary bipolar technology, with vertically integrated NPN and PNP transistors, enables larger peak-to-peak output voltage swings that are well-suited for high-voltage requirements in high-end audio applications.
 
Key Technical Features – LME49600 High-Current Audio Buffer
The LME49600 is a high-performance, low-distortion, high-fidelity audio headphone buffer that can continuously source or sink 250 mA. Designed for use inside an op amp’s feedback loop, it increases output current, improves capacitive load drive and eliminates thermal feedback. The LME49600 offers pin-selectable bandwidth, including a low current, 110 MHz bandwidth-mode that consumes 8 mA and a wide 180 MHz bandwidth-mode that consumes 15 mA. In both modes, the LME49600 has a nominal 2000 V/us slew rate. Bandwidth is easily adjusted by either leaving the bandwidth-control pin unconnected or connecting a resistor between the bandwidth pin and the emitter voltage pin. The device’s supply voltage range is +/- 2.25V to +/- 18V. The LME49600 is fully protected through internal current limit and a thermal shutdown that activates when the junction temperature exceeds 150 degrees C.

Pricing and Availability
The LME49600 is available now in a 5-lead TO-263 surface mount package and is priced at $4.50 each in 1000-unit quantities. More information, easy-to-order samples and evaluation boards are available at
http://www.national.com/pf/LM/LME49600.html.

Note to editors:  To view a high-resolution downloadable photo of this product, visit National's photo gallery.

About National’s Audio Portfolio
National Semiconductor has been a leading provider of audio solutions for more than 30 years and offers a wide range of products in its Boomer®, Overture® and high-performance audio lines. National works with every major handset maker in the world and is the leading provider of analog audio solutions for the cell phone market. The company's line of Boomer audio amplifiers and subsystems enhance and enrich the entire range of sound – from voice, ring sounds and music – that can be amplified in mobile phones and other portable equipment. National manufactures Class AB and Class D speaker amplifiers, headphone amplifiers and audio subsystems for many applications ranging from portable devices to high-power, high-fidelity audio systems. The company offers its higher-power Overture amplifiers for mid-performance consumer applications, and National’s new high-performance series brings dramatically improved sound quality to high-fidelity consumer and professional audio equipment. For more information on National’s audio products, visit
http://www.national.com/audio.

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, interface products and data conversion solutions. National's key analog markets include wireless handsets, displays, communications infrastructure, medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, Calif., National reported sales of $1.93 billion for fiscal 2007, which ended May 27, 2007. Additional company and product information is available at
www.national.com.

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Highly-Integrated LME Devices Reduce Design Time, Enable Audio Power Amplifier Designs with Remarkably Low 0.00035 Percent Distortion Rate

January 15, 2008
– National Semiconductor Corporation (NYSE: NSM) today extended its high-fidelity LME™ audio amplifier family with the introduction of a pair of 200V mono audio power amplifier input stages that deliver industry-leading low distortion performance and reduce design time. These highly-integrated, single-chip devices accelerate the design of high-end consumer and professional audio applications that span powered studio monitors and subwoofers, audio/visual (AV) receivers, commercial sound reinforcement, automotive after-market audio, professional mixers, distributed audio and guitar amplifiers. They also address a wide range of industrial applications where high-voltage and low-distortion are required.

The LME49811 and LME49830 offer scalable output power based on supply voltage and output device count. With these devices, designers can use the same base circuit design to create multiple power-level solutions up to 1 kW amplifiers, just by scaling the output stage devices to accommodate for more power dissipation and current drive. When implemented in a complete power amplifier design, the LME49811’s total harmonic distortion plus noise (THD+N) is a remarkably low 0.00035 percent, while the LME49830’s THD+N is 0.0006 percent.

The LME49811 and LME49830 contain all the essential circuitry required for a high-quality, high-performance power amplifier input stage. They save board space and design time by replacing more than 25 discrete components (many of which must be hand selected and matched by the audio system designer) in high-power audio amplifiers. This enables designs with more channels and more power per square-inch of chassis space. These devices also provide designers more time to differentiate their output stage and power supply design, as well as “tune” the amplifier’s overall sound.

National’s power amplifier input stages have achieved a new benchmark in integrated circuitry by enabling audio designers to easily create high-power systems, where previously only discrete designs could achieve this level of power and performance.

Key Technical Features – 200V Power Amplifier Input Stages
The LME49811 drives Darlington or bipolar power transistors in an amplifier’s output stage. It is a mono version of the LM4702 stereo driver, National’s first power amplifier input stage for the high-performance audio market. The LME49811 is capable of driving an output stage to deliver in excess of 500W single-ended into an 8-Ohm load. The device can easily attain slew rates of 40V/us, while providing 9 mA output drive current and 100 microvolts output voltage noise. The LME49811 also provides a wide operating voltage range of plus or minus 20V to plus or minus 100V, and its power supply rejection ratio (PSRR) is 115 dB.

The LME49830 is optimized to drive a wide range of MOSFETs with standard and low threshold voltages. It can drive an output stage in excess of 500W single-ended into an 8-Ohm load. The device’s 60 mA output current capability increases design flexibility when selecting output stage configurations. The LME49830 provides slew rates of 40V/us, PSRR of 115 dB, output voltage noise of 41 microvolts and a wide operating voltage range of plus or minus 20V to plus or minus 100V.

The LME49811 and LME49830 are both protected by a thermal shutdown feature. National engineers developed these devices using the company’s proprietary VIP3 process technology. The high-voltage, high-performance, complementary bipolar technology, with vertically integrated NPN and PNP transistors, enables larger peak-to-peak output voltage swings that are well-suited for high-voltage requirements in high-end audio applications.

Pricing and Availability
The LME49811 and LME49830 are available now in 15-lead TO-247 packages and both are priced at $3.33 in 1000-unit quantities. More information, easy-to-order samples and evaluation boards are available at
http://www.national.com/pf/LM/LME49811.html and http://www.national.com/pf/LM/LME49830.html.

Note to editors:  To view a high-resolution downloadable photo of these products, visit National's photo gallery.

About National’s Audio Portfolio
National Semiconductor has been a leading provider of audio solutions for more than 30 years and offers a wide range of products in its Boomer®, Overture® and high-performance audio lines. National works with every major handset maker in the world and is the leading provider of analog audio solutions for the cell phone market. The company's line of Boomer audio amplifiers and subsystems enhance and enrich the entire range of sound – from voice, ring sounds and music – that can be amplified in mobile phones and other portable equipment. National manufactures Class AB and Class D speaker amplifiers, headphone amplifiers and audio subsystems for many applications ranging from portable devices to high-power, high-fidelity audio systems. The company offers its higher-power Overture amplifiers for mid-performance consumer applications, and National’s new high-performance series brings dramatically improved sound quality to high-fidelity consumer and professional audio equipment. For more information on National’s audio products, visit
http://www.national.com/audio.

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, interface products and data conversion solutions. National's key analog markets include wireless handsets, displays, communications infrastructure, medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, Calif., National reported sales of $1.93 billion for fiscal 2007, which ended May 27, 2007. Additional company and product information is available at
www.national.com.

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New Switch-Mode Regulator Features Ultra-Wide Input Voltage Range from 4.25V to 75V

December 17, 2007 -
National Semiconductor Corporation (NYSE:NSM) today introduced the industry’s first high-voltage, monolithic two-switch forward DC-DC regulator for power supply designs in telecommunication, automotive and industrial applications.  The highly integrated LM5015 features an ultra-wide input voltage range from 4.25V to 75V and maximum switching frequency to 750 kHz.  The LM5015 enables easy implementation of either isolated or non-isolated DC-DC converters using a minimum of external components. 

Offered in a small TSSOP package, the LM5015 integrates two 75V N-Channel MOSFET switches for a reduced system component count and very small solution size.  The two-switch forward architecture reduces system losses and noise.  The LM5015 joins National’s high-voltage DC-DC regulator product line which includes the LM5001 and LM5002 high-voltage switch-mode regulators.

Key Features and Benefits
The LM5015 high-voltage switch-mode regulator features all of the functions necessary to implement efficient two-switch forward and two-switch flyback power converters with a minimum of external components.  The easy-to-use regulator integrates high-side and low-side 75V N-Channel MOSFETs with a minimum 1A peak current limit.  The voltage across the MOSFETs employed in the two-switch topology is clamped to the input voltage, allowing the input voltage range to approach the rating of the MOSFETs.  The regulator control method is based on current-mode control, providing inherent ease-of-loop compensation and line feed-forward for superior rejection of input transients.

The operating frequency of the LM5015 is set with a single resistor and is programmable up to 750 kHz.  The oscillator can also be synchronized to an external clock.  Additional protection features include cycle-by-cycle current limiting, thermal shutdown, under-voltage lockout and remote shutdown capability.  The LM5015 is offered in a 14-pin TSSOP package featuring an exposed die attach pad to enhance thermal dissipation.

For more information on the LM5015 or to order samples and an evaluation board, visit http://www.national.com/pf/LM/LM5015.html.

Packaging and Pricing
The LM5015 is available now and priced at $2.05 each in 1,000-unit quantities.
Note to editors: To view a high-resolution downloadable photo of this product, visit National's photo gallery at http://www.national.com/company/pressroom/gallery/power.html
.

About National’s Power Management Products
National solves power management design problems in space- and energy-constrained applications from feature-rich handheld devices through large line-powered systems. From the novice power designer to the power expert, National’s products, people and design tools enable customers to design green-powered systems with complex power supplies in the shortest amount of time. High-performance products include switching regulators such as National’s flagship SIMPLE SWITCHER® family, and application-specific products including white-LED drivers and Power-over-Ethernet controllers.  More information about National’s power management products is available at http://www.national.com/power
.

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, interface products and data conversion solutions. National's key analog markets include wireless handsets, displays, communications infrastructure, medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, Calif., National reported sales of $1.93 billion for fiscal 2007, which ended May 27, 2007. Additional company and product information is available at http://www.national.com
.

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New Crosspoints from National’s PowerWise Energy-Efficient Product Family Consume Less Than 125 mW per Channel, with Jitter Performance as Low as 6 ps at Data Rates up to 3.125 Gbps


November 19, 2007
– National Semiconductor Corporation (NYSE:NSM) today added two low-power, low-voltage differential signaling (LVDS) 2 x 2 crosspoint switches to its PowerWise® energy-efficient product family. The DS25CP102 delivers the industry’s best jitter performance (6 ps typical) at data transmission rates up to 3.125 Gbps, while consuming only 125 mW of power per channel. The device features selectable transmit pre-emphasis and receive equalization to extend signal transmission reach in cables and FR-4 backplanes. The lower-speed (1.5 Gbps) DS10CP152 addresses short-haul applications that do not require signal conditioning. It delivers excellent jitter performance (9 ps typical), with very low power consumption of 57 mW per channel.

The DS25CP102 and DS10CP152 work as splitters or multiplexers for high-speed signal routing and switching in OC-48 telecom as well as standard-definition (SD), high-definition (HD) and 3-Gbps serial digital interface (SDI) professional video applications. They are also used in video and imaging transport applications to select between two data streams or as a splitter to drive two monitors. Their superior jitter and signal conditioning performance allow OEMs to use less costly cable, connectors and components. National built these 2 x 2 crosspoint switches with its proprietary silicon-germanium (SiGe) BiCMOS-8 process technology, which provides the highest performance-to-power ratios for high-speed interface devices.

National’s 2x2 crosspoints offer pin-selectable signal-conditioning features to reduce data-dependent jitter and eliminate the need for repeaters to extend signal transmission reach. Their inputs have a wide common-mode voltage range that allow the crosspoints to accept low-voltage positive-emitter-coupled logic (LVPECL), current-mode logic (CML) and LVDS signal levels without using coupling capacitors. The DS25CP102 and DS10CP152 accept signals directly from the leading 90 nm and 65 nm field-programmable gate arrays (FPGAs) and application-specific integrated circuits (ASICs). They feature 8 kV electrostatic discharge (ESD) protection and 100-Ohm termination on the LVDS input and output pins to minimize insertion losses, component count and board space.
 
These devices are the latest additions to National’s growing family of crosspoint switches, which include the recently announced DS25CP104 and DS10CP154 LVDS 4x4 crosspoints.

About National’s Interface Portfolio
National Semiconductor, the LVDS and CML technology innovator and market leader, offers a wide range of interconnect solutions that transfer high-speed digital signals using world-class analog technology. These solutions help system designers develop high-performance applications in a variety of markets, including communication and industrial systems. The products feature high reliability, low power and low noise, as well as dramatic systems savings in cable and connector costs. National Semiconductor is the world’s largest supplier of high-speed LVDS products, according to Databean’s 2006 Analog IC Market Share survey. For more information on National’s interface products, visit http://www.national.com/appinfo/interface/
.

Pricing and Availability
Available now, the DS25CP102 (3.125 Gbps) is supplied in a space-saving 16-pin LLP® package and the lower power DS10CP152 (1.5 Gbps) is supplied in a 16-pin narrow SOIC package. The DS25CP102 is priced at $5.25 and the DS10CP152 is $3.65, each in 1,000-unit quantities. For more information on the DS25CP102 or to order samples and an evaluation board, visit http://www.national.com/pf/DS/DS25CP102.html
. For more information on the DS10CP152 or to order samples and an evaluation board, visit http://www.national.com/pf/DS/DS10CP152.html.

Note to editors: To view a high-resolution downloadable photo of these products, visit National's photo gallery.

About National’s PowerWise Brand
National’s PowerWise brand reflects the company’s energy-efficient product portfolio.  It signifies products with outstanding performance-to-power at the component level, as well as products that provide an outstanding, energy-efficient solution when coupled with other National parts. National’s PowerWise family of products features energy-efficient power management, operational amplifiers, interface and data conversion products. For more information about National’s PowerWise brand, visit: http://www.national.com/powerwise
.

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, interface products and data conversion solutions. National's key analog markets include wireless handsets, displays, communications infrastructure, medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, Calif., National reported sales of $1.93 billion for fiscal 2007, which ended May 27, 2007. Additional company and product information is available at www.national.com
. 

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