SINGLE-CHIP CAN REPEATER
AMI Semiconductor has started sampling its ISO 11898-2-compatible AMIS-42700 CAN transceiver IC. The transceiver provides the interface between two physical CAN lines, allowing the device to act as a low-cost and low-component count CAN repeater.
The dual high-speed transceiver provides a single-chip repeater solution for interfacing between up to two physical bus lines and the protocol controller in high-speed controller areas networks (CANH). The AMIS-42700 can be used for 12 V and 24 V systems.
It also addresses the needs of CANH buses for in-vehicle networking (IVN). Automotive applications for CANH include control of engine management units and body electronics such as power windows, air conditioning and vehicle lighting.
AMIS has used its advanced I2T mixed-signal semiconductor technology to integrate a high level of functionality into a single compact IC. The devices comprise two differential line transceivers and a logic block that incorporates a repeater function and feedback suppression. Protection is provided by a thermal shutdown circuit and electrostatic discharge protection up to +/-8 kV.
Housed in a compact ‘green’ SOIC 300 20-pin package the AMIS-42700 operates with low electromagnetic emission thanks to close matching of the output signals. This means a common-mode choke is not required. In addition, the wide common-mode voltage range of the receiver inputs allows the AMIS-42700 to offer low electromagnetic susceptibility.
Compared to existing discrete component solutions the AMIS-42700 offers important benefits that include lower power consumption and greater robustness and reliability. The smaller physical size of the integrated single-chip solution can also simplify its inclusion in an application.
The AMIS-42700 is ideal for providing a diagnostic access point to a CANH bus without the need for a separate microcontroller. This results in direct access for diagnostic tools at speeds of up to 1 Mbit/s. Using the repeater, the impedance of the CAN line remains constant regardless of whether interfaces are connected or disconnected. The AMIS-42700 can be used to provide a cost-effective way of extending the physical length of a CAN bus.
The AMIS-42700 is priced at $1.61 U.S. per unit in quantities of 5 k units. Contact AMI Semiconductor for a custom quote based on use and application.
AMI Semiconductor • (208) 233-4690 • www.amis.com
WEB-BASED FLEET MANAGEMENT SOLUTION
CES Wireless has released FleetLinc (www.fleetlinc.com), a web-based fleet management software system. The product provides the user with a set of tools to manage their fleet through a web interface, accessible anywhere in the world by any number of dispatchers or users. The in-vehicle product is the well-proven device already in use by thousands of customers worldwide, from public safety, transportation, police departments, couriers, local state and government bodies. Furthermore, since select CES Wireless mobile products are available through CES Wireless and Motorola resellers, a significant local wireless support resource exists.
Resellers can host their own private labeled FleetLinc service, bring their own airtime plan and subscribe to the service only, bring their own hardware and subscribe to the service, or subscribe to the FleetLinc/CES Wireless airtime plan.
CES Wireless • (800) 327-9956 • www.ceswireless.com
IC INTERCONNECT ACHIEVES ISO AUTOMOTIVE STANDARDS
IC Interconnect has announced successful completion of the registration audit for the International Organization for Standards/Technical Specifications (ISO/TS) 16949:2002 and 9001:2000. This standard encompasses the American (QS-9000), German (VDA6.1), French (EAQF) and Italian (AVSQ) automotive quality standards.
The International Organization for Standards is a worldwide federation of national standards bodies, one from each of 130 countries. ISO promotes the development of standardization and related activities in the world to better facilitate international trade and cooperation. ISO's work results in international agreements that are published as international standards.
In addition to the ISO standards certification, IC Interconnect invests in state-of-the-art equipment and a knowledgeable staff to provide customers with high-quality wafer-bumping services.
IC Interconnect produces more than 240,000 wafers/year and has a standard turn time of five days.
IC Interconnect • (719) 533-1030
SOLUTIONS FOR NIGHT VISION AND LASER APPLICATIONS
OSRAM Opto Semiconductors has announced two solutions to meet the requirements of night vision applications. Both the company's passively cooled Sirilas™ laser diode and its OSTAR™ Observation infrared (IR) light-emitting diode (LED) are ideal for night vision illumination applications that require high performance yet non-visible light.
The Sirilas laser diode module includes 16 individual emitters and offers a compact design. Designed for an output power of up to 20 W, Sirilas is ideal for night vision applications that require approximately 5 W to 8 W.
OSRAM's OSTAR Observation is the company's most powerful IR LED and takes the OSTAR family into the non-visible range. The OSTAR Observation measures 3×1 cm, yet emits infrared light with a wavelength of 850 nm rather than visible light. This wavelength is well suited for sensors in CMOS and CCD cameras used in night vision applications, and the high optical output ensures that the surrounding area is well covered.
Normal circulating air and simple equipment such as fans or thermoelectric coolers (TEC) are all that are needed to efficiently cool the Sirilas laser diode. Its heat sink consists of solid copper material with high thermal conductivity. An integrated lens produces an almost parallel beam with a typical vertical divergence of 1.5 (full angle). Laser bars with other wavelengths (800 nm to 1000 nm) can also be integrated in the package.
The OSTAR Observation is the third product in the company's OSTAR LED portfolio. All three OSTARs measure 3×1 cm, and this area accommodates two rows of five, one mm, thin-film chips. As a surface emitter, the IR LED emits almost all of its internally generated light from the top. This enables the LED to achieve excellent optical output, ideal for integration with external optics. With a forward current of 1 A, the OSTAR Observation produces an output of 5 W, and its specially adapted package ensures the reliable removal of the resultant generated heat.
The IR LED does not need a filter, enabling a much smaller solution that can be easily installed.
The passively cooled Sirilas is under development. Samples are available and production is planned for early 2006. The OSTAR Observation is scheduled to sample in early 2006, and production is scheduled for mid-2006.
OSRAM Opto Semiconductors • www.osram-os.com
Atmel and u-blox AG have announced a GPS weak signal tracking technology called SuperSense, supporting Atmel's ANTARIS GPS chipsets and GPS modules from u-blox. With this GPS software, accurate GPS navigation becomes possible in building interiors, deep urban canyons, covered roads and other locations where GPS reception has been impossible. Previously, such areas prevented effective GPS navigation due to systems' inability to effectively receive faint GPS tracking signals.
SuperSense targets mass-market, automotive and hand-held, FCC E-911 Phase II-compliant GPS product applications. Of particular benefit is the high sensitive dynamic navigation performance of existing and future ANTARIS-based chipsets from Atmel and modules from u-blox. Because of ANTARIS SuperSense-based products' sensitivity, antennas can be moved to a vehicle's interior, allowing products with integrated antennas mounted in glove compartments and under seats, thus reducing automotive GPS installation costs when compared with systems requiring a separate, external antenna.
The ANTARIS GPS engine, jointly developed by Atmel and u-blox, is ideal for indoor GPS reception. The 16-channel ANTARIS features 8,192 simultaneously operating time/frequency search windows. This improves acquisition sensitivity for stand-alone and assisted GPS (A-GPS) operation, enabling satellite search and position calculation in previously GPS-dead areas. SuperSense combines superior tracking sensitivity beyond -158 dBm, low power consumption and high navigation performance. It is available as a beta release when purchasing the SuperSense Evalkit or the TIM-LH GPS module. It will support the ANTARIS GPS portfolio from Atmel as well as TIM-LH modules from u-blox.
The Atmel ANTARIS chipset (ATR0600, ATR0610, ATR0620) uses external Flash memory to control u-blox's SuperSense. The complete GPS electronics module provides exceptional tracking of weak signals and can be integrated into a single platform applicable to multiple products thus eliminating redesign of critical RF electronics.
For more information about the ANTARIS chipset, contact Atmel. For information on TIM-LH GPS modules and SuperSense, contact u-blox.
Atmel Corp. • (408) 441-0311 • www.atmel.com
U-blox • 41 (44) 722 74 44 • www.u-blox.com
Sensor Platforms Inc. has introduced a sensor signal-conditioning IC that can work with multiple resistive, capacitive, inductive, voltage and pulsed sensor elements.
The SSP1492 includes a high-speed pipelined 8051 microcontroller core and up to 15 sensor input channels, supporting flexible multisensor configurations, including collaborative processing of multiple mixed sensor inputs.
The chip also features two hardware math engines; a software floating-point engine for high-order output linearization and temperature compensation; a band-gap voltage regulator for power source stability; an SPI/I2C serial data communication protocol for interfacing to a host processor; an onboard RC oscillator with an external clock option for high-accuracy applications; data EEPROM for non-volatile storage of factory calibration coefficients and user settings, and user-customizable firmware memory space.
The new chip offers “ASIC performance at standard part prices and with immediate availability. It can reduce application development time by up to 90%, eliminate non-recurring engineering costs and improve sensor performance with up to 24-bit resolution.” Devices are available as 4.3 mm × 4.3 mm square bare die, in 80-pin ball grid array (BGA), as well as in 80-pin quad-flat package (QFP).
Sensor Platforms Inc. • (707) 543-8540 • www.sensorplatforms.com
DIGITALLY PROGRAMMABLE SENSOR SIGNAL AMPLIFIER
Analog Devices' AD8556 is a zero-drift, sensor signal amplifier with digitally programmable gain and output offset. Designed to convert variable pressure sensor and strain bridge outputs to a well-defined output voltage range, the AD8556 accurately amplifies many other differential or single-ended sensor outputs. The AD8556 uses the ADI patented low noise auto-zero and DigiTrim technologies to create an accurate and flexible signal processing solution in a compact footprint. The amplifier is aimed at applications like automotive sensors, pressure and position sensors, precision current sensing, and strain gages.
Gain is digitally programmable in a wide range from 70 to 1,280 through a serial data interface. Gain adjustment can be simulated in-circuit and then permanently programmed with polyfuse technology. Output offset voltage is also digitally programmable and is ratiometric to the supply voltage. Additionally, the signal amplifier also features internal EMI filters on the VNEG, VPOS, FILT and VCLAMP pins.
In addition to low input offset voltage, low input offset voltage drift, and high dc and ac CMRR, the AD8556 also includes a pull-up current source at the input pins and a pull-down current source at the VCLAMP pin. This allows open wire and shorted wire fault detection. A low-pass filter function is implemented via a single low-cost external capacitor. Output clamping set via an external reference voltage allows the unit to drive lower voltage ADCs safely and accurately.
When used in conjunction with an ADC referenced to the same supply, the system accuracy becomes immune to normal supply voltage variations. Output offset voltage can be adjusted with a resolution of better than 0.4% of the difference between VDD and VSS. Fully specified from 40 °C to +140 °C, it operates from single-supply voltages of 2.7 V to 5.5 V and is offered in the eight-lead SOIC_N, and 4 mm 4 mm 16-lead LFCSP_VQ.
Analog Devices Inc. • (800) 262-5643 • www.analog.com
OMAP PROCESSOR INTEGRATES MEDIALB INTERFACE
The newest processor in Texas Instruments' OMAP family integrates Standard Microsystems Corporation's (SMSC) MediaLB communication bus for interfacing to media-oriented system transport (MOST) multimedia networks. The processor targets automotive infotainment products including digital media and hard disk drive-based head units. Additionally, TI and SMSC announced that TI and SMSC's Automotive Infotainment Systems (AIS) business unit have established a licensing agreement enabling TI to deliver automotive application processors that integrate SMSC's MediaLB communication bus, facilitating an interface to MOST multimedia networks. By selecting TI's OMAP processor with the integration of MediaLB, tier-one automotive suppliers will future-proof their designs due to the capability of interfacing with all existing and upcoming MOST speed grades and physical layers.
Key to efficient implementation of the MediaLB interface is the digital audio routing engine (DARtE), which provides the interconnection between the MediaLB interface, up to six I2S digital audio ports, and TI's digital signal processor. The DARtE performs multiple channels of hardware mixing, sample rate conversion, framing and scheduling of audio streams, offloading up to 100 MHz of DSP bandwidth and simplifying the management of multiple audio streams.
TI's automotive infotainment processor offers several features including USB 2.0-compliant full-speed host, client and on-the-go ports; secure digital memory card interface; integrated LCD controller with on-chip frame buffer; hardware ATA interface; and an on-chip 10-channel, 10-bit analog-to-digital converter and advanced ADC controller for supporting system-level functions such as monitoring radio signal strength or interfacing to low-cost gyroscopes. MOST multimedia networking technology enables new classes of multimedia application connectivity. It facilitates the efficient transport of real-time streaming multimedia and control and packet information over a single wire or optical fiber. This eliminates the need to run multiple buses throughout a vehicle and enables OEMs to decentralize infotainment functions into various components distributed around the vehicle.
Today's chip-to-chip interface solutions have lacked a high-speed, low pin-count bus capable of carrying all possible multimedia data types, including audio and video streams, and control and packet data for applications such as navigation map information. SMSC is working to establish MediaLB as an open industry standard to provide fast, powerful and cost-efficient solutions for these systems.
The MediaLB interface provides improved access to the MOST bus through a single interface, simplifying design and increasing overall throughput, while reducing pin count, system cost, chip size and overall power consumption. MediaLB reduces complexity and offers a synchronous and serial on-board and interchip communication bus to the MOST network. MediaLB is highly scalable. It is future-proof and will be used on all current and future SMSC MOST network ICs.
Currently sampling to automotive infotainment customers with evaluation modules to be available in the third quarter. TI anticipates that the newest OMAP processor for automotive infotainment products will receive AEC Q-100 qualification by the end of the year.
Texas Instruments • 800-336-5236 • www.ti.com
PROGRAMMABLE INTEGRATED SENSOR INTERFACE CHIP
Melexis has introduced a new versatile, fully integrated and programmable sensor interface solution for automotive and industrial applications. The MLX90320 provides amplification, calibration and temperature compensation for virtually all kinds of resistive bridge type sensors including pressure transducers, strain gauges and position sensors.
With very few additional components the MLX90320 will amplify an analog ratiometric input signal to achieve the desired output signal. This output signal can be corrected for sensitivity and offset errors due to temperature effects. The MLX90320 calibrates the sensor output by nulling the offset voltage and by applying the appropriate signal gain to calibrate the output voltage span between 0 V and 5 V. Error calibration is accomplished via various DACs. The digital coefficients, which determine the calibration parameters, are stored in an on-chip EEPROM. Both gain and offset have coarse and fine DACs, allowing an accurate calibration over a wide range of input errors.
Other features include an operating temperature range of — 40 °C to 150 °C, clamping detection and fault/diagnosis modes, and overvoltage and reverse polarity protection. It enables programming in the production environment post assembly. Among the possible applications are pressure sensors, steering systems (torque sensors), safety restraint systems (seat occupant detection), braking systems (ABS, force), comfort systems (air conditioning) and engine management (injection).
The MLX90320 is sampling in an SSOP14 package, and a development board with Microsoft Windows-compatible control and EEPROM programming software are also available from stock.
Melexis • +32 13 67 07 95