LM258QT

The LM258QT is a high performance monolithic dual operational amplifier, with very low noise and distortion. It is a low-power, low-cost, high reliability solution for all electronic applications. The amplifier has an excellent power supply rejection ratio (PSRR) and high gain accuracy, which makes it very suitable for a wide range of demanding applications.

The LM258QT is an OPA (operational amplifier or precision amplifier) IC and its typical application is in instrumentation measurements as well as audio distortion detectors. It can also be used for active filters and audio preamplifiers. Special features include a low distortion rate, low-power operation, high input impedance, wide gain range, adjustable output offset and low-frequency noise immunity.

Working Principle

The LM258QT is a dual op-amp device with two identical amplifying circuits inside, each powered independently. The output of each circuit is provided by an inverting input and a non-inverting input, which provides a measure of flexibility in design. The output of each op-amp can be set to any level between its supply voltage and ground. It has a very high input impedance as compared to other amplifiers.

The LM258QT’s architecture is based on the classic op-amp circuit. It has a differential input configuration with two input stages, one for each amplifier circuit. The inputs are usually AC coupled, meaning that both amplifiers will respond to the same input signal level, regardless of its polarity. The two amplifiers then process the input signal and produce an output voltage that is proportional to the input.

The two amplifiers are also cross-coupled, meaning changes in the voltage of one amplifier will cause changes in the voltage of the other. This allows for the regulation of the output, by providing feedback from the output to one of the inputs, thereby creating negative feedback. The amount of regulation can be adjusted by changing the gain of each amplifier with the use of external components, such as resistors and capacitors.

Application Field

The LM258QT has a wide range of applications. It has been widely used in audio applications such as amplifiers and pre-amplifiers. It can also be used in instrumentation measurements where low noise and low distortion are important, such as in ultrasound, ultrasound imaging, electronic tomography, and gyroscopes. The LM258QT can be used as a buffer amplifier, in order to maintain a constant voltage, thus sending a correct signal across long distances.

Furthermore, the LM258QT can be used in active filters which are capable of providing different types of filtering, such as low pass filters and high pass filters. Other applications include references for converters and power supplies, for regulators and for isolators.

The LM258QT is also well-suited for low noise and low distortion applications such as analog signal processing, communication systems and audio equipment. With its wide range of features it is ideal for many applications where low noise and low distortion levels are essential.

Conclusion

The LM258QT is a versatile, high performance monolithic dual operational amplifier that provides low noise, low distortion and excellent power supply rejection ratio. It can be used for a wide range of applications, including instrumentation and audio, by providing precision, low-noise amplification. With its numerous features, the LM258QT is a perfect solution for many signal processing applications.