OPA361AIDCKT

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Applications:	General Purpose
Output Type:	Rail-to-Rail
Number of Circuits:	1
Slew Rate:	--
Current - Supply:	5.3mA
Current - Output / Channel:	80mA
Voltage - Supply, Single/Dual (±):	2.5 V ~ 3.3 V
Mounting Type:	Surface Mount
Package / Case:	6-TSSOP, SC-88, SOT-363
Supplier Device Package:	SC-70-6
Base Part Number:	OPA361

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OPA361AIDCKT Application Field and Working PrincipleVideo amplifiers are used to amplify video signals in everyday life. They are necessary for video-recording equipment such as camcorders and TV sets. The OPA361AIDCKT is a video amplifier that is used in various types of video-recording equipment. This article will discuss its application field and working principle to help readers understand how video amplifiers work and where they are used.The OPA361AIDCKT video amplifier is a single-stage gain amplifier with a gain that can be set by an external voltage. It typically has a voltage gain of about 25 dB and can operate from a supply voltage of ±5.5V. The device features an externally adjustable gain and a low-noise Wideband Video Amplifier (WVA) output stage, making it perfect for applications such as amplifying and reproducing low frequency video signals.The OPA361AIDCKT is designed for use in professional, consumer and industrial video equipment such as camcorders, surveillance cameras, LCD and HDTVs, DVD players, projectors and laser projection systems. This video amplifier can also be used in radar and seismic imaging systems, medical imaging systems and optical test instruments.The OPA361AIDCKT’s working principle involves the use of a variable gain amplifier (VGA) circuit consisting of an operational amplifier (Op-Amp) followed by a transconductance amplifier (TGA). The output of the TGA is then fed to the video amplifier’s single-pole low-pass filter (LPF) to reduce noise. The input signal is semiconductor-level, so the negative feedback improves the linearity and reduces the gain errors of the amplifier.In operation, an external voltage is applied to the gain control pin of the OPA361AIDCKT and the amplifier’s gain is set accordingly. The gain control voltage determines the open loop gain of the amplifier and affects the system’s overall response. An applied negative voltage reduces the amplifier’s gain, while a positive voltage increases it. Meanwhile, the LPF passes the flat video frequency signals from the TGA to the output terminal, producing an amplified video signal that can be used for display or recording.The OPA361AIDCKT video amplifier is a versatile device due to its adjustable gain and low distortion. It provides a low-cost and efficient solution for amplifying and reproducing low-frequency video signals for use in a variety of video-recording equipment. Its externally adjustable gain and noise reduction features make it an ideal choice for applications such as camcorders, surveillance cameras and HDTVs.

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