Maxim Integrated MAX9611AUB+ High-Side Current-Sense Amplifier

The Maxim Integrated MAX9611AUB+ is a sophisticated high-side current-sense amplifier with an integrated 12-bit analog-to-digital converter (ADC) and an I²C-compatible interface. This compact device, housed in a small 10-pin µMAX package, is designed to monitor power supply current, sense battery or system loads, and provide diagnostic feedback for system protection and management.

Key Features

• Precision High-Side Current-Sense Amplifier: The MAX9611AUB+ offers a high-side current sensing solution, which allows for the monitoring of current flowing into the load without disrupting the ground plane. This is particularly useful in applications where ground disturbance can lead to data corruption or system instability.
• Integrated 12-bit ADC: The onboard 12-bit ADC provides digital representation of the sensed voltage, which can be used for precise current measurement. This feature simplifies the process of digital integration with microcontrollers and other digital systems.
• I²C-Compatible Interface: The device's I²C interface facilitates communication with microcontrollers, allowing for easy integration into digital systems and enabling the user to program alert thresholds and access the current-sense data.
• Adjustable Current-Sense Gain: Users can configure the gain of the current-sense amplifier according to their specific application needs, providing flexibility and enhancing the accuracy of current measurements.
• Wide Input Common-Mode Range: The MAX9611AUB+ operates across a wide input common-mode range of 0 to +28V, making it suitable for various applications, including automotive and industrial systems.

Applications

The MAX9611AUB+ is ideal for a range of applications where accurate current monitoring is essential. These include:

• Automotive systems
• Battery management
• Power management systems
• Portable devices
• Industrial control systems

Conclusion

The Maxim Integrated MAX9611AUB+ is a versatile and reliable solution for high-side current sensing applications. Its combination of a precision amplifier, an ADC, and a digital interface in a compact package makes it an excellent choice for designers looking to enhance system reliability and performance through accurate current monitoring and diagnostics.