MAX4080FASA+T
Overview
The MAX4080FASA+T is a high-side, unidirectional current-sense amplifier designed for precision monitoring in high-voltage systems. It features a wide input common-mode range from 4.5V to 76V, which is independent of the supply voltage, making it ideal for 48V telecom and automotive battery applications. With a low 75uA quiescent current and 0.1 percent accuracy, it provides a power-efficient solution for sensitive current measurement.
Why Choose This Part
The device's main advantage is its high 76V input range combined with a very low 0.1 percent gain error, ensuring accurate readings across a wide dynamic range. It simplifies design by allowing the input common-mode voltage to be significantly higher than the supply voltage (VCC), and its 250kHz bandwidth supports relatively fast transient detection.
Applications
Getting Started
To implement this part, place a low-value sense resistor in the high-side path and connect the RS+ and RS- pins directly across it. Ensure bypass capacitors are placed close to the VCC pin (4.5V to 76V) to minimize noise impact on the 100nV/rtHz noise floor. The output is a single-ended voltage proportional to the load current, which can be directly interfaced with a microcontroller ADC.
Also Consider
