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EETE SEP 2014

Microminiature board-to-board connector system Molex’ SlimStack SSB6 SMT allows maximum space savings in mobile devices, with an innovative mating alignment that ensures easy and secure contact Measuring 0.35x0.60x2.00mm wide, the SlimStack SSB6 connectors save space in the compact packaging of smartphones and other portable mobile devices, as well as a wide range of surgical, therapeutic and monitoring medical devices. The SlimStack SSB6 connectors (plug and receptacle) incorporate several innovative design features that help to ensure high connector performance and reliability, even when mobile devices are dropped or subjected to shock or vibration. Some key features include wide mating-alignment housing lead-in areas to facilitate fast, easy alignment and mating without risking connector damage due to forced mating; a strong audible/tactile click to provide extra assurance of successful mating; a dual-contact design to provide secure electrical and mechanical contact and prevent open contacts; and a wipe length of 0.13 mm to help remove dust and debris, providing further contact assurance. The housing canopy cover provides an anti-zippering barrier that prevents contact pullout from angled unmating. In the future, the SlimStack SSB series will be expanded with additional versions for different stack heights, an EMI shielded version and a version with a power nail ‘armour’ feature.” Molex www.molex.com Dual power MOSFET reduces losses for DC-DC applications International Rectifier has expanded the company’s power block family of devices with the introduction of the IRFHE4250D FastIRFET dual power MOSFET that reduces power losses by more than five percent at 25 A compared to best-in-class conventional power block devices. The 25 V device is targeted at 12 V input DC-DC synchronous buck applications including advanced telecom and netcom equipment, servers, graphic cards, desktop, Ultra book and notebook computers. The IRFHE4250D features IR’s latest generation silicon and expands the power block packaging platform with a 6x6 PQFN package with exposed top and slim profile for back-side mounting that combined with excellent thermal performance, low on-state resistance (RDS(on)) and gate charge (Qg) delivers superior power density and lower switching losses to shrink PCB size and improve overall system efficiency. As with all IR power block devices, the IRFHE4250D works with any controller or driver to offer design flexibility while delivering higher current, efficiency and frequency capability in a small footprint, and extends IR’s power block offering to a 6x6 PQFN package. The IRFHE4250D is qualified to industrial grade and moisture sensitivity level 2 (MSL2), and is available in a 6x6 PQFN package with exposed top that features an environmentally friendly and RoHS compliant bill of materials. International Rectifier www.irf.com Meter-on-chip for portable device applications offers 16-bit precision Analog Devices has posted details of the AduCM350, which is a complete, coin cell powered, high precision, meteron chip for portable device applications such as point-ofcare diagnostics and body-worn devices for monitoring vital signs. The ADuCM350 is designed for high precision potentiostat, current, voltage, and impedance measurement capabilities. The device’s analogue front end (AFE) features a 16-bit, precision, 160 ksamples/sec analogue-to-digital converter (ADC); 0.17% precision voltage reference; 12-bit, no missing codes digital-to-analogue converter (DAC); and a reconfigurable ultralow leakage switch matrix. It has four voltage measurement channels, up to 8 current measurement channels and an impedance measurement DFT engine. The ADuCM350 also includes an ARM Cortex-M3-based processor, memory, and all I/O connectivity to support portable meters with display, USB communication, and active sensors. It is packaged in a 120-lead, 8×8 mm CSP BGA and operates from −40°C to +85°C. To support extremely low dynamic and hibernate power management, the ADuCM350 provides a collection of power modes and features, such as dynamic and software controlled clock gating and power gating. The AFE is connected to the ARM Cortex-M3 via an advanced high performance bus (AHPB) slave interface on the AMBA matrix, as well as direct memory access (DMA) and interrupt connections. Analog Devices www.analog.com Bluetooth development kit for PIC 32 users Microchip’s PIC32 Bluetooth starter kit is intended for projects such as thermostats, wireless gaming controllers, barcode scanners and diagnostic tools. The kit integrates a PIC32 MCU with LEDs, analogue sensors, user-defined push buttons, USB and I2S/SPI connectivity and mTouch capacitive touch sensing. As well as the PIC32, there is an HCI-based Bluetooth radio, Cree high-output multi-colour LED, three standard single-colour LEDs, an analogue 3-axis accelerometer, analogue temperature sensor and five push buttons for user-defined inputs. The kit includes PICkit On Board (PKOB) which eliminates the need for an external debugger/programmer; USB connectivity; and GPIOs for development of Bluetooth Serial Port Profile (SPP), USB and general-purpose applications. The starter kit also features a plug-in interface for an audio CODEC daughter card which is set to release at a later stage to support Bluetooth audio. The Bluetooth Starter Kit includes a PIC32MX270F256D MCU for main processing that runs at 83 DMIPS with 256 kB Flash and 64 kB RAM. The kit reduces software development time by offering a free Bluetooth SPP stack optimised for the on-board PIC32 MCU for setting-up emulated serial port connections between two peer Bluetooth devices. The Bluetooth Starter Kit is targeted at low-cost applications in the consumer market such as Bluetooth thermostats and wireless gaming controllers. Microchip www.microchip.com 48 Electronic Engineering Times Europe September 2014 www.electronics-eetimes.com


EETE SEP 2014
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