ADIMAX4080FASA+
Overview
The MAX4080FASA+ is a high-side, current-sense amplifier designed for systems where the monitored line voltage exceeds the supply voltage. It operates over a wide input common-mode range of 4.5V to 76V with a high degree of accuracy, making it suitable for high-voltage battery monitoring and telecom applications. The device converts the differential voltage across an external sense resistor into a ground-referenced output voltage.
Why Choose This Part
The part features an exceptionally wide 76V input range while maintaining a low 75uA quiescent current, minimizing the power footprint in always-on monitoring systems. It offers 0.1 percent accuracy and a 250kHz bandwidth, allowing for fast and precise response to current transients. Its ability to operate with an independent supply voltage ranging from 4.5V to 76V provides significant design flexibility in mixed-voltage systems.
Applications
Getting Started
To evaluate this IC, utilize the MAX4080EVKIT, which provides a pre-configured PCB for quick testing of different sense resistor values. Ensure the sense resistor is placed as close to the RS+ and RS- pins as possible to minimize trace resistance errors. When interfacing with a 12-bit ADC, the 20V/us slew rate and low noise density of 100nV/rtHz ensure signal integrity for high-resolution measurements.
