MAX4125EUA+

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MAX4125EUA+ is a low-noise, low-input voltage-offset instrumentation amplifier. It operates from 1.8V to 5.5V, and has been designed to optimize common-mode dynamic range and power supply rejection ratio (PSRR) in single-supply, low-voltage systems. The MAX4125EUA+ instrument amplifier offers a wide range of features, including a small form factor and a wide variety of input configurations. The amplifier’s 3-transistor architecture minimizes the input offset voltage, resulting in excellent common-mode rejection and power supply rejection ratios.

The MAX4125EUA+ is characterized over the operating temperature range of -40°C to +105°C. It is available in a variety of packages, including SOT23-5, SOT23-6, SOT23-8, and microSOP-8 packages.

Application Field

The MAX4125EUA+ instrumentation amplifier is ideal for a wide range of applications, such as non-invasive sensors and medical instrumentation. It enables accurate current measurements in small form factor systems, where space and power savings are required. It can also be used for automated manufacturing process control, data acquisition systems, portable test equipment, and many other system monitoring applications.

Working Principle

The MAX4125EUA+ is based on a three-transistor architecture, which results in a low input offset voltage and high common-mode rejection ratio. It features a low-noise output and low harmonic distortion, making it suitable for precision applications. The amplifier has an output limiting circuit that ensures that the output voltage does not exceed a predetermined limit, which is settable by external resistors. It also features an open-drain output that is ideal for connecting to low output impedance loads.

The amplifier is powered from a single supply ranging from 1.8V to 5.5V and is designed to reject supply-related noise. The output can be adjusted with a single resistor resulting in minimal external components for a complete amplifier solution.

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