NCP4894MNR2G

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The NCP4894MNR2G is a linear-audio amplifier with a wide range of applications and working principles.

Overview

NCP4894MNR2G is a variable gain amplifier (VGA) designed for linear amplification of audio signals. It integrates an array of transistors and resistors into a single package, which makes it an excellent choice for applications requiring reduced power consumption and high levels of precision. This VGA is capable of variable gain settings between 0 dB and 12 dB while delivering a maximum output current of 250 mA and a 35 MHz bandwidth. Additionally, the device also provides a low noise figure of 1 dB and a fast slew rate of 8 V/µs, making it suitable for demanding audio applications.

Features

• Maximum input voltage: 8 V
• Maximum output voltage: 6 V
• Wide gain range (0 dB to 12 dB) with no amplitude adjustment
• Wide slew rate of 8 V/µs
• Low noise figure of 1 dB
• High output current of 250 mA
• Robust and reliable performance with no audible distortion

Applications

NCP4894MNR2G is a popular choice for audio applications such as PA systems, audio mixers, media players and amplifiers. With its high output current and wide gain range it can also be used in other linear audio applications such as amplifying instrument signals in musical instruments, amplifying sound cards and microphones, and amplifying audio-video signals.

Working Principle

The NCP4894MNR2G employs a differential amplifier architecture to amplify audio signals. This architecture comprises two identical transistors connected in a differential arrangement, with one input port connected to the bases of the transistors and the other input port connected to the emitters. The amplified output is then taken from the collectors of the transistors.

The amplifier can achieve gain settings between 0 and 12 dB with no amplitude adjustment. This is done by varying the relative current ratios between the two transistors. The output can also be adjusted for optimum performance with respect to noise, gain and power consumption. This is done by adjusting the device\'s bias current and feedback resistors.

Conclusion

The NCP4894MNR2G is a linear-audio amplifier ideal for demanding audio applications thanks to its wide gain range, low noise figure, and high output current. It is a robust and reliable device that delivers an impressive performance with no audible distortion. Its wide range of applications make it a popular choice for PA systems, audio mixers, media players, and various amplifying instruments.

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