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ZXFV4089 Datasheet(PDF) 1 Page - Diodes Incorporated |
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ZXFV4089 Datasheet(HTML) 1 Page - Diodes Incorporated |
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1 / 12 page  Issue 4 - December 2008 1 www.zetex.com © Diodes Incorporated 2008 www.diodes.com A Product Line of Diodes Incorporated ZXFV4089 Video amplifier with DC restoration Description Ordering information The ZXFV4089 is a DC restored video amplifier (black-level clamp) in an 8 pin SOIC package. It integrates a high performance video amplifier with a nulling sample and hold amplifier specially designed to provide brightness level stability. The input video signal is AC coupled to the main amplifier and this AC coupling capacitor also acts as the holding capacitor for the sample and hold amplifier. This configuration reduces both pin count and external components over traditional solutions. Typically, during the back-porch interval of an analog video waveform the sample and hold amplifier forces the input of the video amplifier to the reference voltage. The video waveform is now referenced to the new reference voltage for the remainder of the line-scan interval. The video amplifier has been optimised for video applications and as such drives back- terminated 75 loads with good differential gain and phase errors. The current feedback architecture allows the bandwidth to remain fixed over a wide range of gains, and is set by two external resistors. The ZXFV4089 is specified for operation at ±5V and over the -40°C to +85°C temperature range and is pin compatible with the industry standard EL4089. Features • Complete analog video DC level restoration system • Supports various TV systems • PAL, NTSC, SECAM • Excellent video performance • 0.08% differential gain • 0.1° differential phase • 30 MHz 0.1 dB bandwidth • 210 MHz -3 dB bandwidth • 400V/ms slewrate • TTL/CMOS logic compatible HOLD input • Pin and function compatible with industry standard EL4089 Applications • Black level clamp, providing stable intensity in video systems such as: • cameras • image capture • video mixing •displays • DC restoration of other high frequency signals Figure 1 Pin connection diagram Part number Reel size (inches) Quantity per reel Device marking ZXFV4089N8TA 7 500 4089 ZXFV4089N8TC 13 2500 4089 |
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