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EETE NOV 2013

Please visit us at the productronica in Munich, hall A1, booth 375 4-channel PCI Express frame grabber captures analogue video and stereo audio Sensoray has added the Model 810, PCI Express 4-channel frame grabber to its portfolio, with audio capture, capable to simultaneously capture four channels of analogue NTSC/PAL video and four channels of stereo audio. It captures raw video frames from each channel at up to full frame rate, resulting in an aggregate frame capture rate of up to 120 fps for NTSC and 100 fps for PAL. The high frame capture rate, through a single-lane x1 PCI Express interface, makes it well-suited for applications that require uncompromising capturing of multi-channel video/audio sources in a PCI Express form factor, such as broadcast-grade video/audio capturing, video surveillance, law enforcement, and traffic monitoring. Four BNC connectors are available on the board’s mounting bracket for connecting external composite video sources. A DB15 connector on the same bracket is used for the audio inputs. A 34-pin header provides an alternative convenient access to all I/O signals on the board. Video, Audio, and VBI support The unit supports a wide range of video capture resolutions, including D1, VGA, QVGA, QQVGA, SIF, 2SIF, 4SIF, CIF, QCIF, SQCIF and 4CIF. Captured frames are formatted as raw RGB or YUV. However, 3rd party and/or OSS CODEC can be used for compressed video/audio capture. The audio can be stereo or mono, and the sampling rate supports 32kHz, 44.1kHz, and 48kHz. Embedded data may be added to each frame during the vertical blanking interval (VBI). Since the display is inactive during this interval, it can be used to transmit time codes, closed captioning, teletext, CGMS-A copy-protection indicators, and various data encoded by the XDS protocol. Sensoray www.sensoray.com High-precision, fully differential programmable gain amplifier Texas Instruments’ PGA281 is a zero-drift PGA providing 5 μV offset voltage for precision and long-term stability. A fully differential, zero-drift, 36-V programmable gain amplifier, the PGA281 offers the lowest offset voltage in its class to improve accuracy and long-term stability. Its zero-drift architecture enables DC precision and long-term stability. It also reduces the need for future system calibration. You can use the PGA281 in industrial signal acquisition applications, including test and measurement, strain gauges, bridge amplifiers, and medical instrumentation. Features of the PGA281 include a Zero-drift architecture, an offset voltage of 25 μV and an offset voltage drift of 174 nV/C with a maximum gain of 128 enables designers to optimise system performance. The offset voltage provides stability over a wide variety of conditions, including time and temperature. More than 140 dB over a wide frequency range doubles the ability to reject common mode signals at unity gain. This allows minimal error when resolving changes in voltage. Digitally programmable internal gain options and output scaling capabilities provide more than 20 unique gain selections. Programmable gain and attenuation allow for a wide input range of a few millivolts to greater than 20V, which makes the device a versatile front end. An error flag pin indicates if an over-voltage or over-load condition has occurred, allowing the designer to monitor and maintain a clear signal. The PGA281 comes in a 5x6.4mm, 16-pin TSSOP package, specified over a temperature range of –40C to +105C. Texas Instruments www.ti.com


EETE NOV 2013
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