MAX7405EPA+

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• Interface - Filters - Active

MAX7405EPA+

The MAX7405EPA+ is an active filter designed by Maxim Integrated and is most commonly used in industrial applications. It is designed to reduce noise, reduce EMI/RFI, and improve common mode rejection.

The MAX7405EPA+ features a selectable filter bandwidth of 0.3GHz, 0.6GHz, 1.2GHz, and 2.4GHz and operates on a standard ±5V power supply rail. Its compact design makes it an excellent choice for size-constrained applications.

Application Field:

The MAX7405EPA+ is primarily used in industrial applications, in particular those that require a high level of noise reduction. It is commonly used in motor drivers, switch mode power supplies (SMPS) and servo motor systems.

The MAX7405EPA+ can also be used to reduce interference from outside sources such as transmission lines and computer monitors. It is also useful for medical devices that require a high level of filtering to reduce EMI/RFI emissions.

Working Principle:

The MAX7405EPA+ uses a simple topology, commonly referred to as a "Gyrator-C" topology. It features two main components: a high-pass filter and a low-pass filter. The high-pass filter is designed to reduce the audible noise while the low-pass filter is designed to reduce the high-frequency interference.

The MAX7405EPA+ also features two inputs, one of which is used to adjust the high-pass filter curve while the other is used to adjust the low-pass filter curve. The input voltage is then passed through the filter and the output is converted to the desired frequency range using an amplifier.

The MAX7405EPA+ is also equipped with a power supply rejection feature, which is designed to reduce the amount of power supply noise in the output signal. The MAX7405EPA+ is a highly configurable filter and can be easily programmed to fit specific needs.

Conclusion:

The MAX7405EPA+ is a versatile active filter designed by Maxim Integrated. It is primarily used in industrial applications, in particular those that require a high level of noise reduction. The MAX7405EPA+ features a selectable filter bandwidth and a power supply rejection feature, making it an excellent choice for size-constrained applications.

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