The ACS712-5A is an integrated circuit (IC) module that is commonly used for measuring current in electronic circuits. It is a Hall effect-based linear current sensor that can accurately measure both AC and DC currents.
The module has a 5A nominal current rating, meaning it is designed to measure currents up to 5A. It provides an analog output voltage that is proportional to the measured current, allowing easy interfacing with microcontrollers or other analog-to-digital converters (ADCs).
It incorporates a Hall effect sensor, a precision voltage reference, and a linear amplifier circuit. It operates based on the principle that when current flows through a conductor, a magnetic field is created around it. The Hall effect sensor detects this magnetic field and converts it into a voltage output.
The output voltage of the ACS712-5A module varies linearly with the applied current, providing a voltage output of 185mV per ampere of current. This linear relationship simplifies the calibration and interpretation of the measured current.
To use the module, it typically requires a power supply (usually 5V) and a proper connection to the circuit under measurement. The output voltage can be read using an analog input of a microcontroller or other data acquisition system, where it can be converted into a current value using appropriate scaling factors.
The module is commonly utilized in applications such as power monitoring, energy management, motor control, and current sensing in various electronic systems.