OP491GS

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​The OP491GS is a precision low-power, single-supply, unity gain stable video amplifier. It features a typical low-noise figure of 3.1nV/√Hz, wide bandwidth of 100MHz, low distortion of 0.002%, low input bias current of 1pA and low quiescent voltage of 1.4V, making it one of the most popular operational amplifier available in the instrumentation and buffer amplifier spaces.

The OP491GS is typically used as a video amplifier, amplifier for instrumentation and as a low-power buffer amplifier. It can also be used to drive high-speed digital logic.

The primary operating principle of the OP491GS is based on differential input voltage amplification by a fully differential transistor pair. This provides low-noise performance and low-input offset voltage.

In the application field of instrumentation, the OP491GS is used for any application where high-precision and low-noise performance are required. This includes data acquisition systems, test and measurement systems, oscilloscopes, and spectrum analyzers.

In the application field of buffer amplifiers, the OP491GS can be used to invert voltage signals. It is commonly used to drive high-power loads such as servo motors and transducers because of it’s high current capability and low-noise performance.

In the application field of video amplifiers, the OP491GS is used to amplify the voltage of a video signal. Video amplifiers are used to process video signals in medical imaging systems such as ultrasound.

The OP491GS is a versatile operational amplifier with excellent performance and wide-ranging applications. Its low-noise, high-precision capability along with wide bandwidth, low distortion, and low input current make it an ideal choice for instrumentation applications, buffer amplifers, and video amplifiers.

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