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Solid-state switches build multiplexers, with fault detection/protection Analog Devices has posted details of a solid-state switch that should prove useful for a wide variety of signal-routing applications, including relay replacement, in areas such as analogue I/O, process control, data acquisition, instrumentation, avionics, ATE, and communications systems. The ADG5436F contains two independently controlled singlepole/ double-throw (SPDT) switches. All switches can be disabled by bringing the enable input low. The switches exhibit break-before-make switching action, making them suitable for multiplexer applications. They conduct equally well in both directions when on, and have an input signal range that extends to the supplies. They can safe handle tens of mA in the switched channel, up to 113 mA depending on drive and temperature conditions, and switch in around 0.5 μsec. The digital inputs are compatible with 3-V logic inputs over the full operating supply range. Input signal levels up to +55 V or –55 V relative to ground are blocked in both the powered and unpowered condition. When no power supplies are present, the switch remains in the off condition, and the switch inputs are high impedance. Under normal operating conditions, if the analogue input signal on any Sxx pin exceeds VDD or VSS by a threshold voltage, VT, the switch turns off. Operating on a single 8-V to 44-V supply or dual ±5-V to ±22-V supplies, the ADG5436F draws 1.2 mA in fault mode and 0.9 mA in normal mode. Available in a 16-lead TSSOP package, it is specified from –40°C to +125°C and priced at $3.86 in 1000s. Analog Devices www.analog.com Faster charging, higher efficiency from wireless charging Rx IDT’s P9027 claims shorter charging times and improved thermal performance; the wireless power receiver IC is packaged an ultra-compact form factor. The P9027 magnetic induction receiver offers 80% peak system level efficiency and improved overall thermal performance. The high-efficiency architecture enables higher power transfer rates, translating into shorter charge times for portable devices. P9027 is an 8W receiver with compact solution size —approximately 37 square millimetres— and requiring six fewer capacitors than competitive products. The device’s proprietary alignment guide optimises inductive coupling with the transmitter to maximise coil-to-coil power efficiency. The 3V to 7V adjustable output voltage range is capable of driving a variety of downstream power management ICs, while proprietary foreign object detection (FOD) ensures safe operation in the presence of metal objects. In wireless power transmitter and receiver solutions for wireless charger applications, IDT says it addresses all major standards and technologies with a portfolio of standards-certified products, in both magnetic induction and magnetic resonance technologies, and actively participates in the Wireless Power Consortium (WPC), Power Matters Alliance (PMA), and Alliance for Wireless Power (A4WP) as a board member. IDT www.IDT.com Zipper fins improve heat-sink performance Lightweight zipper-fin heat sinks from Advanced Thermal Solutions offer fin profiles with high aspect ratios, enabling taller, thinner, and more tightly packed fins for greater cooling performance. Fins are machined from thin sheet metal and formed into custom shapes. These sheets are designed to interlock with very little space between layers. The fin assembly is wave-soldered to a metal base forming a rigid, lightweight heat sink. ATS zipperfin heat sinks enable the combined use of copper and aluminium materials: a copper base allows for optimal heat spreading, while aluminium fins minimise weight. Integral ducts can be added to contain and enhance cooling airflow. This improves thermal performance, particularly with active sinks that receive airflow from fans and blowers. For many of these configurations, the top surface of the heat sink can also be used as a heat spreader for hot components. Building on the benefits of higher performance and lighter weight, the zipper-fin heat sinks are able to cool LEDs, as well as a multitude of hot components in telecommunication, data communication, military, and embedded electronic applications. A video is here. Advanced Thermal Solutions www.qats.com Verification tool automatically generates test cases The DANA software framework helps developers of infotainment and driver assistance systems to get faster to reliable results in that it automatically generates test cases for the interfaces used in the respective project. The platform also facilitates regression tests. The DANA framework is based on Luna, the latest version of the open development platform Eclipse and is designed in particular with automotive infotainment developments in mind. By developing DANA, the Fraunhofer Institute for Embedded Systems and Communications Systems (Fraunhofer ESK), picks up the results of a study on software development it conducted a couple of years ago. In this study, the majority of the interviewees rated the tests as the most complex and most time-consuming part of software development which also requires very high tool support. In the automotive and avionics industries, developers typically utilize bespoken test tools. The DANA platform enables users to adapt the test tool according to their own needs without having to completely develop their tools from scratch. According to Fraunhofer project manager Gereon Weiß, the platform is particularly apt to multivendor systems with many heterogeneous components. The verification process of software services in the automotive context embraces multiple aspects including communications infrastructure, applications logics and user data. All these aspects need to be treated differently during the verification process. DANA is based on the FRANCA interface description language (IDL) which has been developed by the Genivi consortium. DANA www.esk.fraunhofer.de 40 Electronic Engineering Times Europe April 2015 www.electronics-eetimes.com


EETE APR 2015
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