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EETE OCTOBER 2012

DESIGN & PRODUCTS ANAlOG DESIGN Reader Three DlP lightCrafter 2.0 kits to low input current optocouplers in SOP-4 mini- evaluate TI’s DlP technology In this month’s reader offer, Texas flat package offer space saving benefits Instruments gives away three of its latest DLP LightCrafter Vishay Intertechnology has broadened the its optoelectronics 2.0 kits for EETimes Europe readers to win. This kit in- portfolio with the release of a new series of low input cur- cludes a host of improvements related to the built-in TI rent optocouplers with phototransistor output. The VOM617A TMS320DM365 embedded and VOM618A series feature low input processor, the graphical user currents of 1 mA (VOM618A) and 5 interface (GUI), and FPGA sup- mA (VOM617A) in the compact SOP-4 port. The compact DLP-based mini-flat package, which saves 30% platform worth $599 enables PCB space over the DIP-4 package. The fast development cycles for new VOM617A and VOM618A series end-equipments requiring small offers nine different current transfer ratio form factor, lower cost and (CTR) ranges from 40% to 600%, which provide designers with intelligent, high-speed pattern increased flexibility. The VOM617A and VOM618A are designed display. The 117x65x23mm board features the 0.3 WVGA for isolated feedback loops, I/O isolation, and isolation in chipset, which is well suited for a variety of embedded switchmode power supplies, AC adapters, motor drivers, solar functions such as structured light pattern projection, intel- invertors, networking switches, telecom line cards, and home ligent lighting, wavelength selection and portable display. appliances. The optocouplers protect equipment users from Developers can easily create, store, and display high-speed electrical shocks and protect the microprocessors within these pattern sequences through an easy-to-use GUI. systems from being damaged by voltage spikes. The devices The 20 lumens output RGB LED light engine combines with released today, also known as opto-isolators, feature a GaAs a 4kHz binary pattern rate in a native resolution of 608x684 infrared emitting diode, which is optically coupled to a silicon pixels. The kit runs under the embedded Linux OS. Updates phototransistor. The SOP-4 package provides a 3750 VRMS with DLP LightCrafter 2.0 include additional sequence isolation voltage rating and creepage and clearance distance of modes such as individual pattern previewing, a “play once” ≥5 mm. The VOM617A and VOM618A optocouplers are molded option (instead of a continuous pattern sequence mode), using an eco-friendly ‘green’ compound, and are RoHS-compli- support for colour and grayscale BMP files, and a new ant and in accordance to WEEE 2002/96/EC. They are certified slideshow mode that reads content directly from an SD to UL, CSA, VDE, FIMKO, and CQC safety standards. card. Users can customize pattern timing and also benefit Vishay Intertechnology from individual RGB LED control. www.vishay.com Check the reader offer online at Energy measurement and diagnostic solution www.electronics-eetimes.com for mission-critical motors The highly integrated MAX78638 allows for constant and simultaneous monitoring of multiple pumps and motors. The Data converter with internal reference delivers turnkey solution for 3-phase motor energy measurement lowest power in its class and diagnostics contains a microcontroller, compute engine Analog Devices has introduced the first product in a series of (with preloaded firmware), and a ultra-low-power, 12bit, 1MSPS SAR (successive approximation high-accuracy analog-to-digital register) A/D converters with an internal 2.5V reference. The converter (ADC). Its flexible and AD7091R allows indus- configurable sensor interfaces trial and medical equip- allow for the measurement ment designers to optimise of current, voltage, speed, operating and static power vibration, position, and temperature. By monitoring up to budgets. The most power- 10 sensors and calculating the mean time to failure (MTTF) efficient converter in its and energy consumption, a motor’s health can be assessed. class, the device dissipates The solution’s preloaded firmware shortens development over 70 percent lower power time by giving the customers easy access to these sensor than the closest SAR A/D measurements. The high-accuracy ADC enables a less converter competitor, in than 0.5% energy calculation error compared to the 5% of a package that is 33 percent smaller than competing 12-bit a standard microprocessor solution. Multiple MAX78638s converters with internal reference. The AD7091R core draws can be placed on many different motors simultaneously 349 μA typical at 3 V when operating at 1MSPS. The device’s to monitor long-time drift, track trends, and quickly detect power automatically scales with throughput. It draws 264-nA faults. The solution is low cost and simple to use and can be power down current and 21.6µA standby current, which allows used with rental motors or small motors that do not already designers to further optimise energy consumption for intermit- have diagnostic capabilities built-in. Preloaded firmware tent or one-shot conversions. The new device also achieves a with documentation and source code help to reduce 4.5 ppm/˚C reference temperature coefficient. When coupled measurement development times. with low-power amplifiers, the AD7091R A/D converter is part of Maxim Integrated Products a chipset that reduces signal chain power dissipation. www.maximintegrated.com Analog Devices www.analog.com 46 Electronic Engineering Times Europe October 2012 www.electronics-eetimes.com


EETE OCTOBER 2012
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