MAX4373HESA

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MAX4373HESA

The MAX4373HESA is a high side amplifier that integrates a current source and voltage follower to optimize accuracy and reduce product size. It is specially designed to cover a wide range of application areas, such as industrial automation, medical and aerospace.

Application Field

The MAX4373HESA is ideal for current sensing applications, high efficiently switch-mode power supply, lighting control, embedded systems, robotics and automation. With its wide input and output range, it can be used to measure an extremely small corresponding current up to a few hundred milliamps. This makes it a great choice for applications that require a very high level of precision.

It is also highly suitable for high side sensing applications, due to its integrated current source configuration. The integration of a current source and voltage follower ensure that it can work with a wide range of input voltages, from lower levels to higher voltages. It has a short circuit protection and a low on-resistance, making it ideal for use in offering over-voltage protection and high accuracy current sensing.

Working Principle

The MAX4373HESA works with a common-emitter topology, where the current signaling path allows the amplifier to accurately emulate the information content of its input signal. This is done by utilizing a current source to provide a bias current that forms the basis of the amplifier’s output signal. The current source is then used to match the input signal’s waveform and impedances, which are then provided to the operational amplifier.

The voltage follower is used to convert the current signal into a voltage signal that is then amplified by the operational amplifier. This signal is then fed to the output stage of the amplifier, which forms the signal that is output to the user. The output stage also serves to provide additional stability against external sources of noise and interference.

The MAX4373HESA also features an integrated shutdown circuitry, which effectively disables the device when the circuit is switched off. This ensures that there is no power drain when the amplifier is not in use and extends its operating life.

Benefits

The MAX4373HESA offers a range of benefits including low power consumption, fast current transitions, wide input and output ranges, low offset voltage and sampling error, high safety design to prevent over-voltage damage and over-temperature protection. Its feature also allows it to provide low noise performance, high linearity and high accuracy.

This device is typically used in current sensing and monitoring applications, and can be easily integrated into industrial, medical and aerospace systems. In addition, it has a large ambient temperature range and a high level of immunity to electromagnetic interference, making it an ideal choice for high-performance applications.

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