OPA445AUG4

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The OPA445AUG4 is a low-noise, high-output rail-to-rail op-amp that is used primarily in linear applications. It is primarily used as an instrumentation amplifier, buffer amplifier, and audio amplifier. The OPA445AUG4 is designed for applications that require a low-noise, high output op-amp with wide dynamic range and low power consumption. The op-amp is particularly well suited for audio applications.

Application Field

The OPA445AUG4 is primarily used in linear applications, such as instrumentation amplifiers, buffers, and audio amplifiers. It can also be used for other linear applications such as precision amplifiers, sample-and-hold amplifiers, analog-to-digital converters, logarithmic amplifiers, and low-noise gain stages. The op-amp is particularly well suited for applications where high voltage common-mode range is needed.

Working Principle

The OPA445AUG4 op-amp works on the principle of differential input stage. This means that it takes two input signals and amplifies them differentially to obtain an output signal that is higher in voltage than the input signals. The op-amp can have a single-ended (unipolar) output range or a rail-to-rail (bi-polar) output range, depending on the configuration. The device can operate with a wide common-mode range of -25 V to +25 V, with a maximum supply voltage of ±27 V.

The OPA445AUG4 is capable of a high output current of 10 mA and can drive up to 100 loads. It can operate with a wide input common-mode range of +1 V to +25 V and has an input offset voltage of 20 μV. The power supply rejection ratio is extremely high, up to 80 dB at 10 kHz, providing excellent stability even in noisy applications. The chip also features a low-noise amplifier, with a noise voltage of 0.4uVrms and a signal-to-noise ratio of 115dB.

The OPA445AUG4 also features a high slew rate of 13.5 V/μs and a high gain-bandwidth product of 5 MHz, making it suitable for high-frequency applications. It is capable of a wide range of gain . . . from 0.1 to 100 V/V. The device has an open-loop voltage gain of 200 V/V at 1 kHz and a unity-gain bandwidth of 5.5 MHz.

Conclusion

The OPA445AUG4 is a low-noise, high-output rail-to-rail op-amp that is used primarily in linear applications. It is mainly used as an instrumentation amplifier, buffer amplifier, and audio amplifier. It has wide dynamic range and low power consumption, making it well suited for audio applications and other high-performance applications. The device has a wide common-mode range of -25 V to +25 V, a high output current of 10 mA, and an input offset voltage of 20 μV. It also features a low-noise amplifier, a high slew rate, a high gain-bandwidth product, and a wide range of gain. All of these features make the OPA445AUG4 a great choice for any linear application.

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