MAX4081SASA+

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The MAX4081SASA+ is a high-voltage, unity-gain-stable, rail-to-rail, CMOS output amplifier, which operates from a single 5V supply voltage and consumes only 2.6 mA. It is specifically designed for use in a wide variety of applications from circuit test and measurement to industrial and medical instrumentation. The MAX4081SASA+ offers an excellent signal-to-noise ratio with low distortion, low input bias current and low input offset voltage. It has an operating temperature range of -40°C to +85°C, making it well-suited for many industrial and automotive applications.

The MAX4081SASA+ is ideal for a variety of applications, including high-side amplifier, low-side amplifier, active capacitance transducer, DC bridges, and signal conditioning. It is also specified for full-scale output current of 1 mA,making it a very versatile amplifier.

The MAX4081SASA+’s unique feature is the rail-to-rail output swing capability. It is capable of driving a large capacitive load (up to 470 pF) without compromising the signal integrity. With its high accuracy and wide bandwidth (up to 70 kHz), the MAX4081SASA+ is ideal for instrumentation and control applications.

The working principle of the MAX4081SASA+ is based on a circuit structure that consists of two bipolar transistors connected in a common-base configuration. The amplifier is designed to operate on a single 5V supply and therefore, the output rail-to-rail swing can be achieved by controlling the biasing of the transistors. The output rail-to-rail swing is independent of the supply voltage, allowing the amplifier to be used in a wide variety of applications. Further, the output swing is controlled by the bias current, which can be adjusted to provide the required voltage swing.

The MAX4081SASA+ features an integrated current sensing resistor (CSR) for over-current protection. The CSR is biased with a low bias current which is used to sense the current and limit the output swing if the load exceeds the Safe Operating Area (SOA) of the amplifier. The current sensing resistor is also used to provide a means of current limiting, a feature that is essential for safe operation of the amplifier.

In addition to its excellent performance, the MAX4081SASA+ is also well-suited for a variety of industrial and automotive applications. It has a wide temperature range of -40°C to +85°C and is AEC-Q100 qualified. The amplifier has also been designed to meet the latest EMC and ESD standards.

The MAX4081SASA+ is a high-performance, unity-gain-stable, rail-to-rail amplifier, which is ideal for a wide variety of applications from circuit test and measurement to industrial and medical instrumentation. It features a rail-to-rail output swing capability and an integrated current sense resistor for over-current protection. It is also AEC-Q100 qualified and can operate over a wide temperature range of -40°C to +85°C, making it well-suited for many industrial and automotive applications.

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