ADIMAX44284HAUT+T

Overview

The MAX44284HAUT+T is a high-precision, low-power current sense amplifier designed for monitoring current over a wide input common-mode range of -0.1V to +36V. Operating with a remarkably low supply current of 21uA and featuring a 100V/V fixed gain, it is optimized for power-sensitive applications where accuracy and minimal power consumption are critical. The device offers an exceptionally low input offset voltage of 2uV, ensuring high resolution even with small shunt resistor values.

Why Choose This Part

The primary advantage is the ultra-low 2uV offset voltage, which allows for the use of very small sense resistors to minimize power dissipation. It features a dedicated shutdown pin that reduces current draw to approximately 0.3uA, further extending battery life in standby modes. Additionally, its wide input voltage range starting below ground (-0.1V) allows for versatile high-side or low-side sensing configurations.

Applications

Getting Started

To evaluate this part, designers typically use a precision shunt resistor sized for the expected current range. Ensure the 1.8 kHz bandwidth is sufficient for your application sampling rate, and provide a stable supply voltage between 1.7V and 5.5V. Minimal external components are required beyond the bypass capacitor and the shunt resistor.

MAX44284 Family

Comparing specs that differ across variants. The current part is highlighted.

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