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productroundup Wideband IF receiver chip provides highest dynamic range The AD6676 “IF subsystem-on-a-chip” uses bandpass sigma delta A/D converter technology to digitise IF signals between 70 and 450 MHz with bandwidth up to 160 MHz. The enabling technology behind the performance of the AD6676 is a highly programmable continuous-time bandpass sigma delta A/D converter (CTBPSD) topology which combines highly programmable analogue filtering functionality with high dynamic range conversion. The implementation in deep sub-micron CMOS allows the advantages of oversampling by providing digitised bandwidth of up to 160 MHz. This provides a combination of features that enables “reconfigurable radio” architectures for high-performance heterodyne systems. Dynamic range can be configured to achieve a noise figure of 13 dB, IIP3=36 dBM, and noise spectral density (NSD) Complete article, here as low as -160 dBFS/Hz. High stability MEMS accelerometer/ gyroscope for automotive, industrial uses Murata's SCC2000 series of combined accelerometer and gyroscope sensor devices is aimed at automotive and industrial applications, with optimum temperature dependency, shock sensitivity and bias stability characteristics. It consists of a low-g 3-axis accelerometer with two angular rate sensor options of either X or Z-axis detection, together with a 32-bit digital SPI interface. The sensor has a software selectable 10 or 60 Hz low pass filter that can be configured via SPI. Gyro range is ±125 degrees per second with sensitivity of 50 LSB per degree per second. Typical accelerometer offset temperature drift is ±6 mg for the 2g sensor and ±12mg for the 6g version. Gyroscope offset temperature drift is typically in the range ±0.5°/s for the 125°/sec X & Z -axis product versions. The gyroscope has a typical offset short-term bias stability of 1°/hour for the 125°/sec X-axis device and 2°/hour for the 125°/sec Z-axis product. Reinforced isolation meets highest industrial performance needs Texas Instruments has introduced data converter and digital isolation device families that enable high levels of reinforced isolation ratings along with precision performance for high-voltage applications. Digital isolation and delta-sigma modulator families offer reinforced isolation to help protect electronic equipment from high line voltages. The ISO7842 family provides the highest immunity reinforced isolators and are claimed as first to offer an isolation barrier with a withstand-working breakdown voltage of 1,500 Vrms for a minimum lifetime of 40 years. The AMC1304 delta-sigma modulator family offers precision performance and the lowest power consumption with reinforced isolation for current shunt monitoring. The performance of the Δ-Σ modulator permits the use of smaller-value current measurement shunts in data-acquisition and motor-control boards, reducing losses and resistive heating. The ISO7842 family provides superior overall reinforced isolation breakdown ratings: 8,000 V maximum transient overvoltage, according to standard DIN V VDE 0884-10; or an isolation rating of 5,700 Vrms, according to standard UL 1577, surpassing typical ratings of 5,000 Vrms.The AMC1304 family provides precision with offset error maximum of 150 μV and gain error of ±0.3%, claimed as the industry’s best DC performance. Complete article, here High-integration Bluetooth Low Energy IC Cypress has introduced two highly integrated, single-chip Bluetooth Low Energy products that it says will simplify design of low-power, connected, sensor-based systems. The PSoC 4 BLE Programmable System-on-Chip delivers is a customisable device for IoT applications, home automation, healthcare equipment, sports and fitness monitors, and other wearable smart products; the PRoC BLE Programmable Radio-on-Chip provides a turnkey solution for wireless Human Interface Devices (HIDs), remote controls and applications requiring pure play wireless connectivity. These Bluetooth Low Energy products enable complete systems by integrating a Bluetooth Smart radio, a 32-bit ARM Cortex-M0 core with ultra-lowpower modes, programmable analogue blocks, and Cypress’s CapSense capacitive touch-sensing. This combination of technology claims prolonged battery life, customisable sensing capabilities, and intuitive user interfaces. Complete article, here Complete article, here www.edn-europe.com EDN Europe | DECEMBER 2014 25


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