MAX4645EUA+T

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Introduction

MAX4645EUA+T is an Audio Switches with Three Differential Outputs, designed for analog audio applications. The enhancement-mode of device is in an SOIC-8 package with pins and an internal power switch which is controlled by the logic voltage. This logic voltage can be varied anywhere between 0.8V and 5V, allowing the MAX4645EUA+T to be compatible with many digital logic interfaces.

Application Field

The main application fields of the MAX4645EUA+T are Mixer Applications and Automotive Applications. In terms of Mixer Applications, it can be used for device switching, headphone and line-level switching. As for Automotive Applications, it is applicable for poweramp switching, sound conditioning, high speed crossovers, and channel selection.

Working Principle

The MAX4645EUA+T works on the principle of voltage divider. Firstly, with the help of external resistors, a reference voltage is generated. Then, this reference voltage is applied to the non-inverting input of the internal differential amplifier. After that, when the driver voltage varies between 0 and 5V, the output of the amplifier varies proportionally. The MAX4645EUA+T comes with three inverted output pins, and each of these pins can separately be shut down by making their enable pins low. Eventually, the connection between the driver voltage and the reference voltage can be disabled be making the digital enable pin low.

As mentioned earlier, the audio paths are equipped with an internal power switch. This power switch allows for low distortion and for higher signal purity. When the enable pin is set low, the device starts to draw low supply current, otherwise, it can exceed 1mA with enable pins high. The main advantage of the internal power switch circuit is that it eliminates configuration problems and reduces the occupancy of board space.

Conclusion

In conclusion, the MAX4645EUA+T is a powerful, low-distortion, voltage-divider based audio switch with three differential outputs, designed for analog audio applications. It can be used for both mixer and automotive applications, and its internal power switch circuit makes it easier to configure and minimized the noise and distortion. As such, the MAX4645EUA+T is an ideal solution for a variety of audio switching applications.

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