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Eight-channel, pin-by-pin-configurable, data converter adds design flexibility Configurable as any combination of 12-bit ADC, 12-bit DAC or GPIO, this ADC/DAC/GPIO combination IC gives designers great flexibility to meet their system monitoring and control needs: Analog Devices’ eightchannel data converter combination, “unlocks new levels of design freedom in a tiny package”. The 12-bit, 8-channel ADC/DAC/GPIO combination chip is user-configurable in any functional combination; AD5592R includes a 400-ksample/sec ADC, 6-μsec settling time DAC, digital inputs/outputs, and a reference, on a single chip. The device can be user-configured in any combination of up to eight devices, allowing designers to use a single IC to complete multiple system monitoring and control functions. The combination of on-chip features allows system designers to reduce bill of materials costs and increase design portability and reuse with only minor software changes. The single-chip AD5592R saves up to 85% of the space required by discrete implementations by using a small 2 × 2-mm WLCSP package. The small package suits the device for high-density and space-constrained applications such as wired and wireless communications, building control or any general monitoring or control application where size and design flexibility are key requirements. The new device not only simplifies system architectures but enables greater system functionality through extra control and monitoring capabilities. Analog Devices www.analog.com Sensirion debuts multi-pixel gas sensor Sensor vendor Sensirion AG is set to debut its multi-pixel gas sensor at the 2015 Mobile World Congress in Barcelona, Spain. The company announced it had developed a multi-gas sensor that it was planning to sell to smartphone makers back in November 2013 (Sensirion preps multi-gas sensor ‘nose’ for smartphones). The company will also show a barometric pressure sensor suitable for use for indoor navigation applications. Sensirion (Staefa, Switzerland) has focused on humidity and temperature sensors but is now expanding its range of environmental sensors to include gas and pressure sensors. The gas sensor is the first in the world to be based on multiple gas-detecting pixels. This allows the sensor to perceive its surroundings using various receptors that using pattern recognition is able to interpret different concentrations on different sensors in terms of type and concentration of a wide range of gases. The sensor is housed in a package measuring 2.45mm by 2.45mm by 0.75mm. This will enable mobile devices to sense their surroundings in a way that was never possible before, for example in order to measure indoor air quality, determine the alcohol content of a person’s breath, or recognize smells. Together with the gas sensor, Sensirion is also unveiling a barometric pressure sensor capable of detecting altitude differences of as little as ±1 Pa, equivalent to the height of a single step on a stairway. This sensor measures 1.4x1.0x0.6mm. Sensirion AG www.sensirion.com 800 MHz universal quad clock for complex timing solutions XR81411 is a quad output, high frequency LVCMOS/LVDS/ LVPECL configurable clock synthesiser that generates any frequency in the range of 10 MHz to 800 MHz with four independent PLLs, using a flexible delta-sigma modulator and a wide ranging VCO. The clock outputs have very low phase noise jitter of sub 0.2 psec while the part uses extremely low power. The chip can be used with a standard crystal or an external system clock and each independent output can be configured to select from four different frequency multiplier settings to support a wide variety of applications. Each clock synthesiser includes an integer/ fractional divider allowing output frequency resolution of less than 2 Hz intervals. “The XR81411 extends our universal clock family to multioutput solutions for various end applications,” said James Lougheed, vice president, component products. “The ability to independently configure each output as LVCMOS, LVDS or LVPECL at any frequency makes this an ideal solution for switches/routers, AV timing and FPGA clocking.” Crystal input frequency is 10 MHz to 60 MHz, parallel resonant crystal. Output frequency range covers 10 MHz to 800 MHz, while the VCO range is 2 GHz to 3 GHz. The chip has configurable outputs either as a differential LVPECL/ LVDS pair or as a single-ended LVCMOS. Exar www.exar.com Four-channel video encoder addresses parking assist systems High integration at the chip level, combined with excellent video quality is what Intersil is offering with its TW9984 four-channel analog video encoder for surround-view parking assist and backup camera applications. With its high integration, the chip replaces up to nine separate components. The device integrates four analog video decoders (NTSC / PAL standards) with 10-bit analog-to-digital converters (ADCs) to support four analog camera inputs simultaneously. The on-chip analog video encoder provides the ability to transmit the combined video as a standard analog composite signal to the head unit display. The automotive-qualified TW9984 also incorporates analog anti-aliasing filters on each channel input to further reduce component count. The high level of integration helps to simplify the system design and minimize the solution footprint to preserve critical board space. With a power consumption of about 100 mW per channel, the TW9984 consumes some 20 percent less than comparable solutions. Supporting the 108MHz time-multiplexed ITU-R BT.656 format allows the chip to output four channels over a single 8-bit data bus. Besides the four decoders, the TW9984 also integrates an analog video encoder to re-encode the video signal to the CVBS format. The TW9984 four-channel analog video decoder and encoder is available now in a 10x10mm, WQFN package. Intersil www.intersil.com 48 Electronic Engineering Times Europe March 2015 www.electronics-eetimes.com


EETE MAR 2015
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