Auto Electronics

PRODUCT SPOTLIGHT

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SURFACE-MOUNT LEDS BRIGHTEN AUTOMOTIVE INTERIOR AND EXTERIOR

Agilent Technologies Inc. and Lumileds Lighting have introduced the first three products in the Envisium mid-power family of light-emitting diodes (LEDs). The co-developed Envisium Power PLCC-4 (plastic-leaded chip carrier) surface-mount technology LEDs are intended for automotive exterior lighting and interior lighting applications.

The Envisium Power PLCC-4 SMT LEDs, available in red, red-orange and amber, fill the need for mid-power illumination capabilities between the Agilent PLCC-4 products, operating at up to 200 mW power levels, and Lumileds Lighting's Luxeon LED light sources that operate at power levels of 1 W and higher.

The use of high-performance Lumileds Lighting transparent-substrate aluminum indium gallium phosphide (TS AlInGaP ) LED die enables the LEDs to produce higher luminous flux output than other PLCC-4 LEDs.
Agilent Semiconductor Products Group
395 Page Mill Rd.; Palo Alto, Calif. 94306
Phone: 800 235 0312

www.agilent.com

DIGITAL AUDIO PROCESSOR IS EASY TO USE

Analog Devices Inc.'s latest SigmaDSP digital audio processor is tailored for high-volume, price-sensitive, time-constrained applications, such as automotive audio, digital TV, multimedia PC, and home theater systems. The AD1940 and AD1941 SigmaDSP, together with SigmaStudio, provide a fully automated hardware and software system design tool enabling engineers to implement higher quality DSP audio processing capabilities into more of its designs.

The AD1940 and AD1941 SigmaDSP audio processors feature a 28-bit core running at 75 MHz with 16-channel I/O, enough to process 24-bit audio signals with the headroom to accommodate sound-enhancing features like bass compensation. This flexibility creates a richer audio experience for end users, particularly in space-constrained products like flat panel televisions or multimedia PCs, where a restricted form factor prevents the use of large speakers and subwoofers.

The comprehensive post-processing functions of the AD1940 and AD1941 include tone and distortion control, and a 120 ms delay-pool that provide audio systems engineers with a broad range of design options.

The AD1940YSTZ, featuring an SPI control interface, and the AD1941YSTZ with its I2C control interface, are available in a lead-free 48-pin low-profile quad flat pack package for $5.96 per unit in 10,000-unit quantities. The devices meet the automotive industry's extended temperature range specification of -40° C to+105° C.
Analog Devices Inc.
804 Woburn Street; Wilmington, Mass. 01887
Phone: 800-262-5643;
www.analog.com/AD1940

LINEAR HALL-EFFECT SENSORS ARE FIELD PROGRAMMABLE

Allegro MicroSystems Inc. has released output-pin programmable linear Hall-effect sensors, A1373 and A1374, as a low-cost option for field programmability. With a three-lead single inline package (SIP), lower output noise, and programming on the output pin, these devices complement Allegro's existing portfolio of standard analog output Hall-effect sensors. The A1373/4 devices are one-time field-programmable linear Hall-effect sensors with low-noise ratiometric outputs, intended to allow the user greater flexibility from design concept to release to production. Very precise over temperature and voltage, the chopper stabilization technique used in the Hall element provides low initial offset and minimal drift over temperature.

The sensors are programmable on the output pin, eliminating potential conflicts during programming that could occur when high-voltage spikes are coupled onto Vcc where some discrete components may reside. As field-programmable devices, the user is allowed to set the gain, quiescent voltage output, and the temperature coefficient after finished sensor assembly. Programming post-assembly minimizes the effects of manufacturing-induced stresses and offsets.

Targeted at the automotive and industrial markets, the sensors are available in a three-lead SIP package developed with wider lead spacing to ease soldering to the leads. The difference between the two devices is bandwidth: the A1374 has slighter higher bandwidth and slightly higher noise on the output.
Allegro MicroSystems Inc.
115 Northeast Cutoff; Worcester, Mass. 01606
Phone: 508-853-5000;
www.allegromicro.com

SINGLE CHIP BRINGS DIGITAL TV TO MOBILE HANDSETS

Exploiting its experience in developing digital video broadcasting-terrestrial (DVB-T) chips for mobile car TV receivers, French fables semiconductor company DiBcom has introduced a single chip capable of demodulating digital video broadcasting-handheld (DVB-H) and digital video broadcasting-terrestrial (DVB-T) transmissions. Scheduled for integration into mobile handsets and other portable devices, the DiBcom DIB7000 digital TV chip features robust mobile DVB-T/H reception capability with ultralow power consumption, providing an optimal integrated solution.

The digital TV chip enables clear and continuous reception at speeds in excess of 100 miles per hour. Operating at less than 25 mW in DVB-H mode, the single chip solves power consumption problems and is easily integrated into the smallest form factor display devices with its 8 × 8 mm package.

The digital TV chip includes the core mobile DVB-T functionality, as well as the new DVB-H MPE-FEC frame extraction and correction, dramatically improving the quality of mobile and portable reception (a 6 dB gain has been achieved). Time slicing is supported and can reduce power consumption by a factor of 10 in DVB-H mode as compared to DVB-T. The DIB7000 digital TV chip supports use of DVB-H in handheld devices in the United States or DVB-T and DVB-H in portable devices such as LCD TV and laptop PCs in several regions including Europe. Samples of the DIB7000 are available for qualified customers and pricing is $14 each for quantities of 10K units.
DiBcom
Parc Gutenberg; 2 bis voie la Cardon; 91120 Palaiseau; France
Phone: +33(0)1 69 32 11 16;
www.dibcom.com

CONNECTORS TAILORED FOR AUTOMOTIVE APPLICATIONS

IMS Connector Systems has further extended its product range of SMBA (FAKRA) RF coaxial connectors. And, for the first time, the company presents its high-performance connector family in a new catalog.

SMBA connectors have been specially developed for sophisticated automotive applications and are suitable for use in communication, navigation, security and comfort systems. Thanks to a special standardized locking system, their functionality and safety characteristics fully meet the rigorous demands of the automotive industry, assuring safe and high-performance signal transmission, even in heavy-duty applications.

The new SMBA product catalog is available online and can also be ordered as a hard copy free of charge.
IMS Connector Systems
1400 Waters Ridge Dr.; Lewisville, TX 75057
Phone: 972-219-1240; Fax: 972-436-7141

www.imscs.com

MARK LEVINSON SOUND SYSTEM DEBUTS IN 2006 LEXUS GS

A next-generation Mark Levinson audio system in the 2006 Lexus GS luxury sport sedan is said to provide a discrete 5.1 home theater entertainment experience optimized for playback of music, music videos and movies.

The 14-speaker, 330-watt system features discrete 5.1 multichannel playback via a 7.1 speaker topology, Mark Levinson Surround (MLS) audio software for multiseat listening, full digital transmission from the digital source to the discrete output topology power amplifiers, proprietary metal cone midrange and tweeter transducers, and 5.1 Dolby Digital and DTS decoding of DVD video, DVD audio and DVD-R discs.

Speakers include four 25 mm tweeters, five 65 mm midranges, four 16 cm woofers, and a 25 cm subwoofer. The processor/amplifier will produce a total power output of 330 watts, all channels driven, 20 kHz to 20kHz at less than 0.1% total harmonic distortion.
Mark Levinson
A division of Harman Specialty Group
3 Oak Park; Bedford, Mass. 01730
Phone: 781-280-0300
Fax: 781-280-0490

LDOS PUSH INPUT RANGE TO 80 V

Three LDO regulators developed by Linear Technology accept input voltages as high as 80 V — an increase of 20 V or more over existing LDOs. The wide input voltage on these regulators makes them suitable in automotive and telecom applications. For example, the LT3014 with its 3 V to 80 V input range can maintain a regulated output under “cold cranking” conditions when a car's 12 V battery falls to just 3.5 V or when transients in the system hit the 60 V clamp level. This 20 mA LDO also features a quiescent current of 7 µA and a dropout voltage of 350 mV. The device is offered in a 5-lead ThinSOT and 8-lead DFN packages.

The LT3012 is 250 mA regulator capable of operating from a 4 V to 80 V input. This device consumes a mere 55 µA. Packaging is in 16-lead TSSOPs and 12-pin DFNs. Another 250 mA, 4 V to 80 V LDO, the LT3013 features a “power good” flag to indicate output regulation. This regulator consumes 65 µA of quiescent current. Both the LT3012 and the LT3013 are offered in 16-lead TSSOPs and 12-pin DFNs.
Linear Technology Corp.
1630 Milpitas Blvd; Milpitas, Calif. 95035-7417
Phone: 408-432-1900;
www.linear.com

LVDS SERDES CHIPSET SURVIVES TEMPERATURE EXTREMES

Two new low-voltage differential signaling (LVDS) analog interface chips from National Semiconductor Corporation the SCAN921025H serializer and SCAN921226H deserializer deliver up to 10 bits of digital data at 20 MHz to 80 MHz over a single point-to-point differential interconnect in backplanes or cable. The serializer/deserializer (SerDes) chipset operates in harsh environments up to 125 degrees Celsius.

Harsh automotive and industrial environments require a SerDes chipset that can withstand high temperatures and noise, and includes testability for continuous, reliable operation. Example applications include high-speed data transfer in electrically noisy factories and video cameras mounted in automotive roof enclosures where high temperatures are common. To enable system testing in these environments, National has integrated BIST (built-in self-test) and JTAG into the SCAN921025H serializer and SCAN921226H deserializer.
National Semiconductor Corp.
2900 Semiconductor Dr.P.O. box 58090
Santa Clara, Calif. 95052
Phone: 408-721-5000;
www.national.com

HIGH-PERFORMANCE PRECISION AMPLIFIERS REDEFINE ACCURACY

National Semiconductor Corp. has expanded its high-performance precision amplifier portfolio with three high common-mode difference amplifiers. These include high common-mode amplifiers LMP8270 and LMP8272 and high common-mode bidirectional amplifier LMP8271. Designed for broad-based industrial, commercial and automotive applications, these amplifiers meet the requirements for accurate current sensing measurements in products such as battery charging and discharging for notebooks, cell phones, and fuel injection control.

The bidirectional LMP8271 measures charge and discharge currents at high common-mode voltages typically found in precision applications. It uses an external reference voltage to set the voltage defining a zero-current condition. An LMP8271 output voltage greater than the external reference voltage indicates a charging current condition, while an output voltage below the external reference voltage identifies a discharging current condition. Accurate bidirectional load current measurements are achieved when monitoring the output with respect to the reference voltage.

Similarly, the unidirectional, fixed-gain LMP8270 and LMP8272 will detect, amplify and filter small differential signals in the presence of high common-mode voltages. While the gain is fixed at 20 for the LMP8270 and LMP8271, the LMP8272's gain is fixed at 14. These parts have a -2 V to 27 V input common-mode voltage range and a supply voltage range of 4.5 V to 5.5 V. These devices also function over an extended common-mode input voltage (-5 V to +36 V), enabling high-side current sensing where the input voltage range far exceeds the supply voltage range of 5 V.

The very low offset voltage (<250 microvolts) and offset drift (<15 microvolts/°C guaranteed) of the LMP8270/71/72 allow for accurate small input differential signal conditioning and minimal voltage offset error through the temperature range. Additionally, the extended operating temperature range of -40° C to +125° C allows these amplifiers to be used in extreme conditions, such as those found in automotive and industrial applications.

In production, the precision amplifiers come in SOIC-8 packaging. The LMP8270 is priced at $1.45, the LMP8271 at $1.57, and the LMP8272 at $1.45, in 1,000-piece quantities.
National Semiconductor Corp.
2900 Semiconductor Dr.
Santa Clara, Calif. 95052-8090
Phone: 408-721-5000

www.national.com

NEXT-GENERATION ACTIVE CONTROL RETRACTOR SEATBELT SYSTEM OFFERS MORE FUNCTIONALITY

TRW Occupant Safety Systems Holding GmbH, a subsidiary of TRW Automotive Holdings Corp. has unveiled its next-generation active control retractor (ACR) system. The new product offers improved packaging flexibility and additional functionality. TRW has two contracts for the new version with vehicle manufacturers and will launch the product in 2007.

The TRW ACR is among the industry's first technologies linking active and passive safety systems. ACR is designed to use braking and stability control sensor information to sense a potential accident. The system removes the seatbelt slack to help better position the occupant in relation to the vehicle's airbag restraint system.

The next-generation product offers several comfort features including slack take-up after the belt is buckled and retraction support when it is unbuckled, automatically returning the seatbelt to the park position. Additionally, dynamic driving support has been developed to help keep the driver in the optimal position in the seat during highly dynamic situations and during rapid deceleration. The new system is significantly reduced in size and weight with improved packaging and design flexibility for vehicle manufacturers.

In the new-generation product, its situation management algorithm continuously processes signals from the vehicle's relevant dynamic systems such as ABS, electronic stability control or the TRW adaptive cruise control (ACC) radar.
TRW Automotive World Headquarters
12025 Tech Center Dr.; Livonia, Mich. 48150
Phone: 734-855-3864;
www.trwauto.com

INTEGRATED MINIATURE REFLECTIVE OPTICAL SENSOR OPERATES IN BRIGHT SUNLIGHT

Vishay Intertechnology Inc. has introduced a miniature reflective optical sensor capable of operating in bright sunlight. The TCND3000 surface-mount optical sensor integrates touch and proximity functions and operates in conjunction with an integrated circuit (E909.01) built on ELMOS Semiconductor's high ambient light independent optical system (HALIOS) technology to provide reliable operation in bright sunlight up to 200 kLux. Offering designers a low-cost alternative to mechanical switches, the TCND3000 series device enables improvements in the design and functionality of electronic systems. Highly integrated, the device combines an IR emitter as the source for the touch/proximity signal, another for compensation for ambient light, and a photo diode as the receiver for the touch/proximity signal.

The TCND3000 solution allows contact-free detection of movement through a translucent surface, enabling proximity detection at a distance of 2 cm and touch detection at a distance at a distance of 1 cm from the sensor surface. The self-adjusting system compensates for environmental disturbances such as ambient light, aging of optical components, and surface impurities or scratches.

The optical sensors measure 5 mm by 2.6 mm with a height profile of 3 mm. These restriction of hazardous substances-compliant devices are available in a lead-free, surface-mount-style package constructed on PCB mold technology. Each features a 5 V operating voltage, a ±20° angle of half-sensitivity, an 870 nm operating wavelength, and an operating temperature range of -40° C to +85° C.
Vishay Intertechnology Inc.
63 Lincoln Highway ; Malvern, PA 19355-2120;
www.vishay.com

LED MODULE HAS LONG LIFE

Using hi-flux Golden DRAGON light-emitting diodes (LEDs) developed by OSRAM Opto Semiconductors, OSRAM Sylvania has designed a new series of LED modules for lighting applications. Called DRAGONtape, each module comprises six DRAGON LEDs connected in series on a flexible linear printed circuit substrate. It comes with a self-adhesive backing for simple installation and mounting on a heat-sink. Each hi-flux DRAGON LED provides a luminous flux of up to 25 lumens for white color at an operating current of 350 mA. For white light application, these modules offer a service life of up to 50,000 hours when their Tc point temperature is maintained at 40° C.

The supplier has also developed matching power supplies for these modules. These supplies permit optimum operation of the hi-flux LEDs by powering them at a constant current of 350 mA. The DRAGONtape LED modules will be available in three color temperatures for white light — 4700K, 5400K and 6500K. All these choices provide a color rendering index (CRI) greater than 80.
OSRAM Sylvania
100 Endicott Street; Danvers, Mass. 01923
Phone: 978-777-1900

www.sylvania.com

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