MAX4372FEUK-T

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MAX4372FEUK-T, part of Maxim Integrated\'s Instrumentation, OP Amps, Buffer Amps family of products, is a low-cost, low-noise differential amplifier featuring a wide bandwidth and low quiescent current. The device features a shutdown pin that allows power savings during standby and small overall size due to the internal compensation and the absence of external components. In addition, the device is designed to use ultra low power by utilizing a single supply of 3v to 5.5V.

The MAX4372FEUK-T has a differential input signal range of ±VCC, with an input offset voltage of 10mV. It also features an adjustable gain of 0dB to 95dB with less than 1.2dB of gain at unity. Furthermore, the device has a high slew rate of 33V/µs, with a low distortion linearity of 1.1% (THD + N) across its entire frequency band of 10kHz to 4MHz. The output short circuit current is 25mA maximum and the open loop gain of the amplifier is 70dB.

The device can be used in applications such as instrumentation, data acquisition systems and industrial measurement. In addition, the device can be used to monitor and control multiple voltages and temperatures in process control applications. It can also be used as an output buffer in power control systems as well as amplifying audio signals in hi-fi amplifiers and receivers.

The working principle of the MAX4372FEUK-T is based on the implementation of one or two differential input stages with a common mode feedback circuit that maintains the common mode voltage to the inputs at 0V. The differential input stages are connected to the output stages via a transconductance amplifier. Its main purpose is to boost the difference between the two input signals, while keeping their common mode voltage fixed. This is accomplished by feeding back a portion of the differential output voltage to the differential input of the amplifier and combining a portion of the positive and negative rail voltage to the inputs. The differential output is then fed to the output stages of the amplifier, which provide amplification and output matching.

The MAX4372FEUK-T has on-chip thermal protection that prevents the device from thermal runaway condition. Additionally, it has a power down control pin that brings the amplifier into shut down mode. This pin control feature allows the user to save power in cases such as system stand-by operation or when the amplifier is not in use. Furthermore, it has high common-mode rejection ratio, good input-referred noise performance, and excellent linearity.

In conclusion, the MAX4372FEUK-T is an economical, low-noise, high bandwidth, low-power differential amplifier that is easily configurable and integrates various features. It is suitable for use in a wide range of applications, including instrumentation, data acquisition systems, industrial measurements, power control systems and audio amplifiers. It features on-chip thermal protection, power down control, high common-mode rejection ratio, good input referred noise performance and excellent linearity.

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