Maxim Integrated MAX9918ASA/V+T Precision Current-Sense Amplifier

The MAX9918ASA/V+T from Maxim Integrated is a high-quality, precision current-sense amplifier designed to deliver accurate current measurement in a variety of applications. This device is particularly well-suited for applications that require low input offset voltage and bidirectional current sensing, such as power management systems, battery chargers, and automotive systems.

Featuring a wide input common-mode range from -0.1V to +28V, the MAX9918ASA/V+T can operate from a single 2.7V to 5.5V power supply, making it versatile for both low and high-side current sensing configurations. Its precision is highlighted by its low input offset voltage of 250µV (max) and gain error of just 0.5% (max), which ensures accurate current measurements even at low current levels.

This device offers a fixed gain of 60V/V, providing a high level of amplification for small sense voltages across a shunt resistor. Additionally, the MAX9918ASA/V+T boasts a wide bandwidth of 80kHz, which is ideal for capturing fast transient signals without significant delay. The extended temperature range from -40°C to +125°C guarantees reliable performance in harsh environments.

The MAX9918ASA/V+T comes in an 8-pin SOIC package, which is suitable for space-constrained applications. Its lead-free and RoHS-compliant design aligns with environmental standards and regulations, making it a responsible choice for modern electronic designs.

For design flexibility, the device includes a shutdown mode that reduces current consumption to a mere 2µA, which is essential for power-sensitive applications. The current-sense amplifier is also equipped with a reference voltage input, allowing for adjustable current thresholds and facilitating bidirectional current sensing without the need for additional circuitry.

In summary, the Maxim Integrated MAX9918ASA/V+T is a robust and precise current-sense amplifier that is ideal for a wide range of applications where accuracy, reliability, and efficiency are paramount. Its comprehensive feature set and compact form factor make it an excellent choice for designers looking to enhance their current measurement capabilities.