LA78141-S-E

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The LA78141-S-E is a video processing device used to amplify and equalize composite video signals in both television and video related applications. This device is part of Linear Technology\'s family of video products. It offers excellent video characteristics and robust power dissipation with low power consumption. The LA78141-S-E is a monolithic integrated circuit (IC) designed to replace four discrete transistors, two capacitors, and a low-noise amplifier in composite video systems. It is fabricated using a mixture of bipolar junction transistors (BJT) and complimentary metal-oxide-semiconductor (CMOS).

The LA78141-S-E features a composite video gain block with internal amplifier for positive voltage supply applications. It also provides adjustable differential gain and symmetrical clipping by varying a single external resistor. With the help of on-board feedback compensation, the device is able to provide surprisingly high bandwidth with flat frequency response. The adjustable differential gain control helps to maintain constant contrast and/or color saturation, while the symmetrical clipping prevents cross-over distortion. As an added benefit, the LA78141-S-E features active offset removal circuit, which compensates for input DC offset commonly found in video applications.

For video applications where noise reduction is of prime importance, the LA78141-S-E can be used in combination with an external low-noise amplifier (LNA) to provide excellent S/N ratio and minimize the effects of noise in the video information. The device also facilitates direct connection to high impedance signals. Its adjustable output enables direct connection to video detector circuits without the need of additional conditioning circuitry.

To leverage the unique features and minimize the overall footprint of the device, the LA78141-S-E should be used with Linear Technology\'s family of high quality video products. These products include the LT1912, LT1913 and LT1914 comparator ICs, which offer increased RF circuit design flexibility. These ICs provide fast shuttering and distortion-free clamped outputs for improved video performance.

At a glance, the LA78141-S-E offers integrated differential gain control, symmetrical clipping and active offset removal for improved video performance. It offers a wide bandwidth with flat frequency response and low power consumption. The application fields are primarily in television and video related systems, making this device suitable for use in high-end audio/videography applications. By leveraging the device in combination with Linear Technology\'s compatible ICs, customers can achieve a cost-effective image solution.

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