LMH0356SQE-40/NOPB

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The LMH0356SQE-40/NOPB is a linear-video processing advanced product from Texas Instruments. It is a single channel low-power, low-noise differential amplifier specially designed for video applications. It has a slew rate of 8V/μs, supporting 2X gain with an offset of only 2.8mV. The LMH0356SQE-40/NOPB application field is wide, covering video applications such as video equalization, video input stage, video clamp, pedestal clamp, and studio reference systems. It also has the distinguished function of operating in a single-ended power supply.

The LMH0356SQE-40/NOPB working principle begins with the using the power supply voltage and the two inputs to set the DC offset. The first stage is a transimpedance amplifier with an input-referred noise of 7nV/√Hz and a voltage mode normalization. The second stage is an ultra low noise differential amplifier used to perform video equalization. This equalization can be setup correctly by setting the input-referred noise. When the audio and video signals are combined, these equalization levels can be further adjusted to provide video equalization that best suits the system.

The working principle of the LMH0356SQE-40/NOPB also involves a common mode feedback circuit, which optimizes the DC performance, as well as the input to the differential amplifier for symmetrical loading. The amplifier is equipped with slew rate capability for fast settling, as well as wideband gain capability for low distortion. The amplifier is also capable of driving capacitive loads as low as 400pF without settling time degradation.

The LMH0356SQE-40/NOPB also has a two pole low pass filter for eliminating undershoot, as well as a slew rate detector for eliminating overshoot. Additionally, the amplifier can operate in single-ended power supply applications, which provides a low-power and low-noise performance while improving the flexibility of the video equalization circuit. The video equalization circuitry uses proprietary techniques to accurately control the equalization in a predictable manner, providing a consistent gain regardless of the gain setting. The amplifier also has a dedicated reset pin, allowing the user to reset the amplifier to a known state if the gain is adjusted incorrectly.

Overall, the LMH0356SQE-40/NOPB is an efficient, low-power, low-noise differential video equalization amplifier designed for video applications. Its function is to provide video equalization with predictable gain accuracy and low distortion. Additionally, it has slew rate, capacitive load, and single-ended power supply capabilities and can be used in a wide range of video applications.

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