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productroundup 7-GHz ADC drivers bring AC performance to DC-coupled applications Texas Instruments has added two fully differential amplifiers (FDAs) that provide DC-coupled applications with best-in-class AC performance; the LMH3401 and LMH5401 FDAs provide higher bandwidth and slew rate, and lower distortion than existing ADC drivers. The LMH3401 provides 16 dB of gain with higher performance than similar FDAs, while providing a 30% reduction in both size and power consumption. It delivers 7 GHz of -3-dB bandwidth at 16-dB gain, a slew rate of 18,000 V/μsec, and harmonic distortion of -77 dBc at 500 MHz. The LMH5401 can be configured for 6 dB of gain or more, delivering 6.2 GHz of -3 dB bandwidth at 12-dB gain. It has a slew rate of 17,500 V/μsec, harmonic distortion of -90 dBc at 200 MHz, and IMD3 of -90 dBc at 200 MHz. LMH3401 and LMH5401 deliver highest bandwidth and slew rate at low power; they also eliminate the need for baluns, converting a Complete article, here signal from single-ended to differential. Integrated MCU/Wi-Fi module for IoT edge nodes In the Atmel | SMART portfolio of SmartConnect lowpower, secure Wi-Fi solutions, this FCC-certified module offers a complete standalone edge node solution that promises design flexibility and security for IoT developers. Positioned as the first fully integrated FCC-certified Wi-Fi module with a standalone MCU and hardware security from a single source, the SmartConnect SAM W25 module includes Atmel’s 2.4 GHz IEEE 802.11b/g/n Wi- Fi WINC1500, along with an Atmel | SMART SAM D21 ARM Cortex M0+- based MCU and Atmel’s ATECC108A optimised CryptoAuthentication engine with ultra-secure hardware-based key storage for secure connectivity. The fully integrated SAM W25 delivers a secure ‘plug and play’ solution integrating wireless technologies with the design flexibility required for Internet of Things (IoT) designers. Debug for Cortex-M: full instruction trace in real time IAR Systems’ I-jet Trace is a probe providing extensive debugging and trace functionality, delivering large trace memory capacities and high-speed communication via USB 3. The probe supports all ARM Cortex- M cores, including the ARM Cortex-M7 core, that have Embedded Trace Macrocell (ETM) capabilities. Tracing every single executed instruction, ETM provides developers with insight into the microcontroller’s activities and enables them to find critical bugs that are difficult or even impossible to find any other way. I-jet Trace has a memory capacity of 32 Msamples. It allows real-time trace clocking at up to 150 MHz and Serial Wire Output (SWO) using Manchester and UART, clocking at up to 200 Mbps. The trace data is collected by the C-SPY Debugger in IAR Embedded Workbench and can be visualised and analysed in various Complete article, here windows. Software-controlled magnetic sensing gives HMI-design flexibility Calling it a software-defined sensor, Melexis has introduced a magnetic sensing product that it describes as ultraflexible, and that gives engineers great freedom in defining HMI implementations through its breadth of programmable parameters. Melexis is aiming this device beyond the automotive market to general sensing applications; it gives, the company says, three-axis sensing without a great deal of signal processing. You can access “raw” measurements from its SPI /I²C interface. This fully programmable, extremely compact sensor IC is capable of accurately measuring changes in magnetic flux density along its X, Y and Z axes. Based on the company’s Triaxis technology, the MLX90393 provides “almost unlimited” scope with which all manner of human machine interface implementations can be accomplished - from joystick, slide switches, push/pull switches, levers, linear swipe switches and rotary knobs, right through to complex 3D position sensing systems. Complete article, here Complete article, here 24 EDN Europe | DECEMBER 2014 www.edn-europe.com


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