ZXFV4089N8TC

ZXFV4089 VIDEO AMPLIFIER WITH DC RESTORATION DEVICE DESCRIPTION The ZXFV4089 is a DC restoring circuit and low-distortion video amplifier. It is specially designed to provide brightness level stability as a ‘black-level clamp’ in video systems with very low distortion and low power consumption. A high fidelity video amplifier is combined with a sample-hold switch circuit using an external coupling capacitor to provide level-shifting of the video output such that a time-gated sample of the waveform is set to be equal to an external reference voltage (usually zero voltage). A buffered TTL/CMOS logic input signal controls the switch. The gain is set externally by two resistors. In a typical application, the sample-hold circuit is gated on during part of the back-porch interval of an analog video waveform. Then the video waveform is stabilised for the remainder of the line-scan interval. FEATURES AND BENEFITS Various TV systems, PAL, NTSC, SECAM Buffered output using high quality video amplifier Gain is set using two external resistors On chip sample/hold capacitor 300 MHz bandwidth 0.02% differential gain 0.02° differential phase +/-5V supply operation 8 mA supply current Pin and function compatible with industry standard part APPLICATIONS ORDERING INFORMATION Part Number ZXFV4089N8TA ZXFV4089N8TC Container Reel 7 ″ Reel 13 ″ Increment 500 2500 Black Level Clamp, providing stable intensity in video systems such as cameras image capture video mixing d...