EPN April 2012 - (Page 61)

Hall-Effect Linear Current Sensor IC has 100kHz bandwidth, low noise analogue signal path Future Electronics Debuts RF/Wireless division; signs three new global franchises S olid State Supplies has availability of a Hall-effect linear current sensor IC from Allegro MicroSystems. The ACS711 is a cost-efficient device that provides accurate AC or DC current sensing in low-voltage audio, communications systems, white goods, industrial power supplies, lighting, and automotive applications. Typical uses include circuit protection, current monitoring, and motor and inverter control. The device consists of a linear Hall sensor circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field, which is sensed by the integrated Hall IC and converted into a proportional voltage. Device accuracy is optimised through the close proximity of the magnetic signal to the Hall transducer. Full-scale sensing options within the ACS711 family include ±12.5 and ±25A. The output of the device has a positive slope proportional to the current flow from IP+ to IP- (pins 1 and 2, to pins 3 and 4). The internal resistance of this conductive path is 1.2mOhm typical, providing a non-intrusive measurement interface that saves power in applications that require energy efficiency. The device is optimised for low-side current sensing applications, although the terminals of the conductive path are electrically isolated from the sensor leads (pins 5 through 8), providing sufficient internal creepage and clearance dimensions for low AC or DC working voltage applications. The thickness of the copper conductor allows survival of the device at up to five times over-current conditions. The device is provided in a single small-form-factor surface-mount SOIC8 package, and obviating the need for an external sense resistor. Other key features include: economical low- and high-side current sensing, output voltage proportional to AC or DC currents, overcurrent active low FAULT trips and latches at 100% of full-scale current, low-noise analogue signal path, 100kHz bandwidth, 3.3 to 5.5V single-supply operation, integrated electrostatic shield for output stability, factory-trimmed for accuracy, extremely stable output offset voltage, zero magnetic hysteresis, and ratiometric output from supply voltage. uture Electronics has made a major commitment to the RF and Wireless Sector. At the Embedded World exhibition in Nuremberg it launched Future RF and Wireless Solutions accompanied by a raft of new global supplier agreements. The new division is tasked with helping OEMs to bring RF-enabled end products to market efficiently and successfully. New suppliers signing global agreements with the venture are Sierra Wireless with its embedded cellular telephone modules; RFM, a supplier of short-range RF components, ICs and modules; WiFi chipset experts Qualcomm Atheros; and EnOcean boasting RF modules with energy harvesting capability. They join a broad selection of RF offerings from existing franchised suppliers including Synapse, NXP Semiconductors, Freescale, Microchip and Roving Networks. Future RF and Wireless Solutions’ product offerings support applications across the frequency range from lowfrequency ICs (used for example in ultra low-power receiver ICs in active RFID tags) to the >2GHz frequencies in use in the latest high-bandwidth embedded LTE (cellular) and Wi-Fi modules. As well as a broad RF linecard, the new division also offers a team of specialist RF applications engineers who will provide face-toface support to engineers, advising on system architecture and RF technology, supporting circuit designs and helping to optimise and future-proof designs for production. In Europe, dedicated regional RF applications engineers serve each of the UK and Scandinavia, Mediterranean Europe, central Europe, southern France, northern France and Benelux, and Israel. Ralf Bühler, Vice President and Managing Director (EMEA), of Future Electronics said: ‘Many OEMs are seeking to add RF capability to end products for cable replacement or to add connectivity to previously stand-alone devices. These manufacturers are very knowledgeable about their core product and its technology, but they often have no experience with RF. Future Electronics has launched Future RF and Wireless Solutions to combine our systems-level expertise and supply-chain excellence with a focus on supporting new RF designs. This combination will help customers more successfully implement RF in their end products.” Future eleCtroniCS F SoliD StAte SupplieS www.epn-online.com/search?search_keyword=47031 www.epn-online.com/search?search_keyword=47396 epn issue n ° 4 – April 2012 0 61 http://www.epn-online.com/search?search_keyword=47031 http://www.epn-online.com/search?search_keyword=47396

Table of Contents for the Digital Edition of EPN April 2012

Cover
RS Components
Contents
Edito
Bergquist
Contents Web
LEMO
New Products
Traco electronic
Panasonic
Digikey
Digikey
International Rectifier
Cables & connectors
Hirose
Mouser
Adtech Ceramics
International Rectifier
RF & Wireless
Digikey
New Products
Teseq
Fischer Connectors
Analog Devices
Tech report
Automotive Electronics
Digikey
Smartgrid
Coilcraft
Sensor & Test
Renewable Energy
Digikey
40th anniversary interview
Industrial Automation
Digikey
New products
PCIM
Hannover
Test corner
Power perspective
Distribution spotlight

EPN April 2012