Broadcom ACHS-7121-000E: High-Precision, Galvanically Isolated Current Sensor

The Broadcom ACHS-7121-000E is a highly integrated current sensor module designed for accurate and reliable AC or DC current sensing in a wide array of applications. It combines a precision Hall-effect sensor with a low-resistance current conductor, providing a key solution for systems requiring galvanic isolation between the current path and the measurement circuit. This isolation is critical for protecting sensitive low-voltage electronics from high-voltage faults and noise, enhancing both system safety and signal integrity.

A standout feature of the ACHS-7121-000E is its high accuracy and reliability. The device offers a typical total output error of less than ±1% at room temperature, ensuring precise measurements for critical control and monitoring functions. Its integrated conductor features a very low resistance of 1.2 mΩ, which minimizes power loss and heat generation when sensing high currents, thereby improving overall system efficiency.

The sensor operates on a single 5V power supply and provides an analog output voltage that is proportional to the AC or DC current being measured, centered at 0.5 VCC (typically 2.5V) for bidirectional current sensing. With a fast response time and a bandwidth of 80 kHz, it is exceptionally well-suited for rapid overcurrent detection and real-time control in demanding environments such as industrial motor drives, robotic systems, and power inverters.

Furthermore, its compact and robust package simplifies assembly and offers high immunity to external magnetic fields and mechanical stress. The ACHS-7121-000E represents a optimal balance of performance, safety, and ease of use, making it an excellent choice for modern electronic designs.

ICGOODFIND: The Broadcom ACHS-7121-000E is an exemplary solution for designers seeking a high-performance, isolated current sensor that delivers precision, low power loss, and robust safety in a compact form factor.

Keywords:

Galvanic Isolation

Current Sensing

Hall-Effect Sensor

High Accuracy

Bidirectional Sensing