MAX4081FAUA+T

The MAX4081FAUA+T is a precision single-channel, low-cost current-sense amplifier designed for industrial, automotive, and other high-noise applications. It is designed to provide proper current-sense gain, well-controlled input offset voltage, frequency response, input noise and ESD protection. This amplifier is suitable for a wide range of current measurements from µA to the multiple-amp range and is suitable for monitoring load or battery current, or other low-level current sources.

The MAX4081FAUA+T belongs to Linear-Amplifiers-Instrumentation, OP Amps, Buffer Amps. It is a high-precision current-sense IC which helps to accurately measure current in various applications. It is an integrated circuit that amplifies the current from a sense resistor with high CMRR and low offset voltage. It amplifies the output voltage from the sense resistor on the primary side of the device, enabling the user to measure the current flow in the load. It also provides ESD protection.

The MAX4081FAUA+T has a wide range of operating voltage and temperature range. It operates from a 4.5V to 28V single-supply voltage range and -40°C to +125°C, making it suitable for industrial, automotive and other high-noise applications, especially in harsh environmental conditions. The device features a low input bias current of 500pA and a high input impedance of 10M Ω, which reduces the offset error introduced by the sense resistor. Calibration of the input offset is accomplished using a single external bipolar capacitor, making it suitable for low-cost applications such as consumer protection circuits, motor control and automotive power systems.

The gain of the MAX4081FAUA+T is adjustable from 1 to 100V/V. A frequent application of current-sense amplifiers is current-shunt measurement which gives a low full-scale voltage of 1mV/V and thus requires a gain of 100V/V. This can be easily achieved using the MAX4081FAUA+T. The frequency response of the amplifier extends up to 30MHz, making it suitable for feedback envelope applications in switching converters.

The MAX4081FAUA+T is protected by a thermal shutdown circuitry that limits the die temperature in case of excessive junction temperature. It is available in an 8-pin MSOP package and is RoHS-compliant. This package allows for reduced board size and is suitable for high-density applications.

To summarize, the MAX4081FAUA+T is a low-cost, low-noise and high-precision current-sense amplifier, designed for industrial, automotive, and other high-noise applications. It operates from a 4.5V to 28V single-supply voltage range and -40°C to +125°C. It features adjustable gain from 1 to 100V/V, low input bias current of 500pA and high input impedance of 10M Ω. It is available in an 8-pin MSOP package and is RoHS-compliant. The frequency response of the amplifier extends up to 30MHz. This makes it suitable for precise current measurements and feedback envelope applications in switching converters.