MAX4374FESD

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Type:	Amplifier, Comparator, Reference
Applications:	Current Sensing, Power Management
Mounting Type:	Surface Mount
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	14-SOIC
Base Part Number:	MAX4374

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Introduction

MAX4374FESD is a Linear Amplifier of a Special Purpose. It is mainly used in Industrial, Automotive and Aerospace applications. Architecturally, MAX4374FESD has a dual-channel configuration, with each channel providing low-power amplification with a low-noise performance. The device was designed for use in high-performance power amplifiers and pre-amplifiers.

Application Field

MAX4374FESD is mainly used in the fields of Industrial, Automotive and Aerospace applications. Industrial applications include Valve Actuation and Position Control, as well as for PI and PID Control. The device is also capable of providing robust control in Aerospace and Automotive applications, ranging from control of actuators, to engine management.

Working Principle

The basic working principle of the MAX4374FESD is to amplify a low-voltage signal, such as a small Audio or Speech signal, to a higher voltage level. The device incorporates an Operational Amplifier, also know as an Op-Amp, to amplify the incoming signal. The Op-Amp amplifies the incoming signals, by increasing the gain of the signal. The gain of the signal is determined by the value of two externally adjustable resistors, known as the Gain Setting Resistors, which are adjusted to the desired level. The operational amplifier circuit is then followed by a second stage of amplification, which consists of two high-impedance transistors. These transistors are connected in common-emitter configuration, with the input signal applied to their base. The high-impedance transistors amplify the signal further, increasing the gain and the output power, while at the same time providing additional bandwidth.The output of the amplifier stage is then fed to a Low-Pass Filter, which is designed to reduce the noise components of the signal, and to smooth out the signal, providing an output signal of a predominantly sinusoidal wave. The output signal is then fed to a voltage controlled power amplifier, which amplifies the signal to the final output power level.

Conclusion

The MAX4374FESD is a Linear Amplifier of a Special Purpose, capable of providing robust control in Industrial, Automotive and Aerospace applications. The device offers a dual-channel configuration, with each channel providing low-power amplification with a low-noise performance. The working principle of the device is based on a combination of an Operational Amplifier, two High-Impedance Transistors, a Low-Pass Filter, and a Voltage Controlled Power Amplifier. Overall, the MAX4374FESD is ideal for high-performance power amplifiers and pre-amplifiers.

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