Maxim Integrated MAX4080SAUA+ High-Side Current-Sense Amplifier

The Maxim Integrated MAX4080SAUA+ is a precision, high-side current-sense amplifier designed to monitor current in battery management systems, power management applications, and portable devices. This compact and efficient device is housed in an 8-pin µMAX package, offering a space-saving solution for applications where board space is at a premium.

With its ability to sense the current through a shunt resistor placed in the high-side of a circuit, the MAX4080SAUA+ offers several advantages. It can detect the current flow in both directions, making it suitable for battery charging and discharging monitoring. It also provides a safer way to measure current, as the ground-referenced output voltage can be easily interfaced with analog-to-digital converters (ADCs) or microcontrollers without the need for level shifting or isolation components.

The device features a wide input common-mode voltage range from 4.5V to 76V, allowing it to accommodate a broad range of supply voltages. This versatility makes the MAX4080SAUA+ ideal for automotive, industrial, and telecom applications where voltage levels can vary widely. The amplifier has a fixed gain of 20V/V, providing a precise and stable output signal proportional to the measured current.

One of the standout features of the MAX4080SAUA+ is its high accuracy, with a low input offset voltage that minimizes error in current measurement. This precision is maintained across the full operating temperature range of -40°C to +125°C, ensuring reliable performance in harsh environments.

The device also includes integrated fault protection features, such as overvoltage protection up to 76V and reverse battery protection, which safeguard the amplifier and the downstream circuitry from potential damage due to incorrect power supply connections or transient voltage spikes.

Overall, the Maxim Integrated MAX4080SAUA+ is a robust and reliable solution for high-side current sensing applications that demand high accuracy, wide input voltage range, and compact packaging. Its ease of use and comprehensive protection features make it an excellent choice for designers looking to enhance the safety and efficiency of their power management systems.