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Triaxial, piezoresistive shock accelerometer comes in 20,000 g and 60,000 g ranges Meggitt Sensing Systems has introduced the Endevco model 7284 series, a family of lightly damped, high-g, triaxial, piezoresistive shock accelerometers designed for weapons testing, high-g data recorders and other extreme-g applications. These very rugged sensors, available in 20,000 g and 60,000 g ranges, offer superior survivability and low power consumption. The Endevco model 7284 series is the triaxial version of the companys popular single-axis 7280A series. It shares the same footprint, bolt pattern and highly survivable sensing system, while making high-g shock measurements across three mutually perpendicular axes. And, with a frequency response extending down to dc (steady state), the model 7284 can measure long duration transient shocks. The robust design of the model 7284 incorporates three sensors mounted in a triaxial arrangement within a single housing. Each axis features a unique piezoresistive MEMS sensor with light gas damping to attenuate resonant amplitudes and prevent breakage in overload conditions. Because units are only lightly damped, they still accurately respond to fast rise times and short duration shock motion. Simple screw-mount installation with factory controlled and tested cross-axis performance makes the model 7284 much easier and more cost effective to install than three single-axis units. Meggitt Sensing Systems www.meggitt.com OCXOs operate at up to +90°C for demanding applications Precision Devices has released the high temperature VN01 and VN03 series of Oven Controlled Crystal Oscillators (OCXO), operating at up to +90°C for applications like satellite communications and a variety of military systems where extremely high temperature operating environments are the norm. In many cases, using these devices can reduce the cooling requirements of a system, hence also reducing the power required for the overall system. Measuring 36.20x27.18x16.81mm, the devices feature a low phase noise, performance in high vibration environments. They are built with double-hermetically sealed quartz crystals and can be made available in custom frequencies from 10.000 to 50.000MHz. Precision Devices www.pdixtal.com Power supply IC protects automotive antenna amplifiers Modern cars are equipped with up to six active antennae for data communication, mobile telephony and similar tasks. Chipmaker Elmos AG has devised a power supply IC which not only provides the right voltage for the amplifiers integrated in these antennae but also offers multiple protection functions. The E522.40 is a compact dual antenna power supply chip which at the same time protects the RF amplifier circuitry against electrostatic discharge (ESD) and overheating as well as against short circuit to ground or battery voltage level. The device can be utilized in antenna applications with supply voltages between 4.5V and 25V. Utilizing external voltage dividers, two independent output voltages can be programmed to a value between 3.3V to VBAT. Despite its small size, the chip offers extensive diagnosis functions. The I2C interface and an 8-bit ADC enable designers to implement real-time monitoring of output voltages and currents. Over and under voltage thresholds can be programmed separately for each output; if needed, they also can be deactivated. An additional analog sensor input can be used in connection with a programmable digital output to monitor a third phantom supply circuit. Elmos www.elmos.com A11E_EETimesEuro-2.375x10.875qxd_A11E.qxd 12/1 H I G H V O L T A G E Over 2500 Std.Models Surface Mount and Thru-Hole DC-DC Converters 2V to 10,000 VDC Outputs Low Profile / Isolated Up to 10,000 Volts Standard Regulated Models Available See PICO’s full catalog immediately www.p icoel ectro n ics. c o m High Power Up to 350 VDC Outputs (Units up to 150 Watts) Regulated / Wide Input Range Isolated Outputs PICOFax 914-738-8225 Electronics,Inc. 143 Sparks Ave. Pelham, N.Y. 10803 E Mail: info@picoelectronics.com Delivery Stock to One Week for sample quantities Pico Representatives Germany ELBV/Electronische Bauelemente Vertrieb E-mail: info@elbv.de Phone: 0049 89 4602852 Fax: 0049 89 46205442 England Ginsbury Electronics Ltd. E-mail: rbennett@ginsbury.co.uk Phone: 0044 1634 298900 Fax: 0044 1634 290904 www.electronics-eetimes.com Electronic Engineering Times Europe January 2014 39


EETE JAN 2014
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