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EETE NOV 2013

Nanopower op-amps optimize system power consumption STMicroelectronics’ TSU10X nanopower op-amps provide ultralow power consumption across the full operating temperature range, allowing engineers to optimize power budget and battery lifetime wherever quiescent current is the major concern. The TSU101, TSU102 and TSU104 are single, dual and quad configurations, respectively. Drawing less current per op-amp than the typical self-discharge current of a lithium-ion battery, TSU10x devices enable longer operation from small coin cells in applications such as energy-harvesting systems, personal medical monitors, smoke alarms, passive infrared detectors, wireless sensors, security cameras and smart tags. Specified maximum current over the temperature range is as low as 800 nA at 1.8 V or 850 nA at 3.3 V and typical current consumption is 580 nA at 25°C and 1.8 V. The maximum input offset voltage is 4.5 mV and input bias current is 300 pA, also specified over the full temperature range. The devices have rail-to-rail inputs and outputs, operate from 1.5 V to 5.5 V, and have typical gain-bandwidth product of 8 kHz. STMicroelectronics www.st.com 8-bit MCUs feature high-accuracy oscillator circuit for single-phase fan motors 8-bit microcontrollers equipped with an oscillator circuit that provides more than twice the accuracy compared with previous models has been developed by LAPIS Semiconductor Co., Ltd., a ROHM Group Company. The ML610Q101 and ML610Q102 utilize motor control technology optimized for controlling rotation in single-phase fan motors. In addition, the industryleading high-accuracy oscillator circuit reduces rotational variations, while multiple timers minimize noise. A hysteresis differential comparator is also built in that allows a Hall element to be used, contributing to lower costs. Additional features include a compact 16pin package 4x4mm, ensuring compatibility with small fans, and high noise immunity (cleared the ±30 kV level in IEC61000- 4-2 noise testing), making them suitable for applications with demanding noise requirements. LAPIS Semiconductor has developed an integrated oscillator circuit and a regulator for logic power supply that does not require external capacitance, providing a two-fold improvement in oscillator accuracy compared with conventional models. This minimizes rotational variations with single-phase fan motor rotation control. Circuit and layout have enabled high noise immunity, making it possible to clear the ±30 kV level. LAPIS Semiconductor www.lapis-semi.com Single IC enables any portable device to be quickly charged over USB in a car Maxim Integrated has introduced the MAX16984 automotive DC-DC converter with USB charge emulator which uses a single IC to recognize and then charge any portable device (PD) directly from a vehicle battery. The single-chip solution integrates all the functions of the traditional three-chip solution. The MAX16984 combines a low EMI 5 V automotive-grade DC-DC converter capable of driving up to 2.5 A with dynamic voltage adjustment, which is essential for charging contemporary PDs over long automotive embedded cables; a USB Battery Charging Specification v1.2-compliant charge emulator, which conducts the necessary handshake between the PD and upstream host instructing the PD to increase its charge current; and integrated ESD diodes and USB over voltage protection switches, which provide robust industry-le ading fault protection. The device operates from a voltage up to 28 V and is protected from load dump transients up to 42 V; integrated output adjustment eliminates cable voltage drop. The MAX16984’s automotive USB function communicates with a connected PD and switches to low-power mode when not in use to reduce power consumption. The device is the only USB protection IC with integrated ESD diodes, which prevent damage to the vehicle’s radio or peripheral components. Maxim Integrated Products www.maximintegrated.com JESD204B FPGA debug software accelerates high-speed design Analog Devices has developed an FPGA-based reference design with software and HDL code that reduces the design risk of high-speed data converter and software defined radio systems using JESD204B-compatible converters. The JESD204B Xilinx Transceiver Debug Tool provides an on-chip, 2-D statistical eyescan that helps designers of radar arrays, software-defined radio and other high-speed systems more quickly verify the signal integrity of JESD204B data converterto FPGA designs using gigabit transceivers. It supports the 312.5-Mbps to 12.5-Gbps JESD204B data converter-to-FPGA serial data interface and Xilinx 7 series FPGAs and Zynq-7000 All Programmable SoCs. The JESD204 and the JESD204B revision data converter serial interface standard was created through the JEDEC committee to standardize and reduce the number of data inputs/outputs between high-speed data converters and other devices, such as FPGAs. Fewer interconnects simplifies layout and allows smaller form factor realization without impacting overall system performance. ADI’s reference design gathers data directly from the on-chip Rx margin analysis feature in the 7 series IBERT core and manages the data locally inside the FPGA or one of the ARM dualcore Cortex-A9 MPCore processors, displaying the data on an HDMI monitor or over Ethernet to a remote monitoring station. Typically, other scanning tools measure signals off-chip and require costly test and measurement equipment or transfer the data back over JTAG to be viewed on a host/development PC in the lab. ADI’s reference design measures link robustness using actual JESD204B serial data running to the FPGA. This use of “live” data enables signal fidelity to be monitored even after the design has been deployed in the field, for real-time and predictive maintenance over the life of the product. Analog Devices www.em.avnet.com 42 Electronic Engineering Times Europe November 2013 www.electronics-eetimes.com


EETE NOV 2013
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