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pulse critical applications such as industrial controls and automation, industrial metering, multifunction printers, test and measurement equipment and medical wearables. The company adds that mission-critical systems require high-performance memories that can capture data instantly and reliably on power loss, and that the 4Mb F-RAM family delivers absolute data security. The 4Mb serial F-RAMs are sampling today in industry-standard 8EIAJ and 8TDFN packages, with production expected in the fourth quarter of 2015. Inductance-to-digital converters: precise position and motion sensing Texas Instruments claims a technology first for its multichannel inductance-to-digital converters (LDCs). The four new devices in the LDC1614 family expand the LDC portfolio, a data converter category that TI first introduced in 2013. The devices offer two or four matched channels and up to 28-bit resolution in a single integrated circuit. The combination of precision and multichannel functionality will allow engineers to design high dynamic range position and motion sensing solutions with simpler system designs and reduced cost, TI says. LDC-enabled inductive sensing employs low-cost, highreliability inductors as sensors, which can be located remotely from the IC. By integrating up to four channels in a single IC, the LDC1614 family allows designers to distribute sensors throughout a system, while centralising electronics on fewer PCBs. This can benefit precision linear or rotational sensing and metal detection in a variety of end equipments including white goods, printers, cameras and automotive infotainment consoles. The LDC1614 family offers multiple, wellmatched channels, to enable differential and ratiometric measurements, allowing designers to compensate for environmental and ageing conditions such as temperature, humidity and mechanical drift. Precision measurement capability provides up to 28-bit resolution; the devices can detect submicron changes in distance. A wide sensor frequency range supports 1 kHz to 10 MHz operation; designers have flexibility to use many types of inductors as sensors. This frequency range also enables use of very small PCB coils, which reduces overall sensing solution cost and size. Powered by a 3.3-V supply, the LDC1614 family consumes approximately 6.9 mW during standard operation and 0.12 mW while in shutdown mode. For high reliability, contactless sensing is immune to nonconductive contaminants, such as oil, dirt and dust, which can shorten equipment life. The LDC1614EVM evaluation board, which includes the ultralow power MSP430F5528 microcontroller (MCU), is available to evaluate the LDC1614 for $29. System designers can build sensors with TI's WEBENCH Inductive Sensing Designer. This online tool simplifies sensor coil design based on application and system requirements. The optimised design can be exported to a variety of computer-aided design programs to quickly incorporate the sensor coil into an overall system layout. Complete article, here Complete article, here 9 EDN Europe | MAY 2015 www.edn-europe.com


EDNE MAY 2015
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