LA4628-E

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LA4628-E Application Field and Working Principle

The LA4628-E is a precision dual operational amplifier designed for high quality audio applications. It can be used in applications such as power amplifiers, line drivers, preamplifiers, headphone amplifiers, and other consumer electronics. The LA4628-E is manufactured using modern CMOS process technologies, which enables it to provide low noise, low cost, and high accuracy performance. This article will discuss the application fields and working principle of the LA4628-E to provide a better understanding of this dual-opamp IC.

Application Fields

The LA4628-E is ideal for use in high quality and low cost audio applications due to its excellent performance parameters. It can be used in a wide range of consumer electronics applications including power amplifiers, line drivers, preamplifiers, headphone amplifiers, and other audio applications. It can also be used in e-commerce applications such as quantity meters and billing systems. The LA4628-E can be used in automotive applications too, such as in-dash stereo headphones, portable navigation systems, and microphone units.

The LA4628-E has a low noise figure and high input impedance, which enables it to provide excellent performance in audio applications. Furthermore, its high power efficiency, low current consumption, and small package size make the LA4628-E suitable for use in battery operated and portable equipment. The LA4628-E is also available in a 14 pin surface mount package, which facilitates its use in space-constrained applications.

Working Principle

The LA4628-E is a dual-channel operational amplifier that consists of two independent amplifiers in a single package. The amplifiers are internally connected to a differential input and a single output. The input circuit is composed of an N-type MOSFET input stage and a bipolar output stage, which provide high input resistance and low noise performance. The output stage uses an open emitter output configuration, which provides high gain and output impedance.

The LA4628-E has two adjustable resistors, which enable the user to adjust the gain and offset. The gain is adjustable up to two times, while the offset can be adjusted from 0 V to 5 V. The device can operate from a single DC supply voltage of 5 V. The current consumption of the device is less than 100 mA, making it an ideal choice for battery-operated applications.

The LA4628-E has a low noise figure of 3.2 µV and THD of 0.005 % at 1 kHz, making it perfect for use in high-fidelity audio applications. Furthermore, it has a very low quiescent power consumption and wide bandwidth, allowing it to perform well in dynamic applications.

Conclusion

The LA4628-E is a high quality and low cost dual-channel operational amplifier that can be used in a variety of applications such as power amplifiers, line drivers, preamplifiers, headphone amplifiers, e-commerce quantity meters, and automotive in-dash stereo headphones. Its high input impedance, low noise, high gain, and output impedance make it ideal for use in audio applications. Furthermore, its small package size, low current consumption, and wide bandwidth make it suitable for use in battery-operated and portable equipment. Overall, the LA4628-E is a great choice for high quality audio applications.

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