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The ACS712 is a precise Hall-effect current sensor for AC/DC measurement. It features 2.1kVRMS isolation, low noise, and easy Arduino integration.
Description
The ACS712 provides a simple way to measure current without the need for complex external circuits. It works by passing current through an internal copper conduction path, which generates a magnetic field. An internal Hall IC then converts this field into a proportional voltage that can be easily read by a microcontroller like an Arduino. With its built-in electrical isolation, it safely separates the high-current path from your sensitive low-voltage electronics.
Features
Dual Current Sensing: Capable of measuring both AC and DC currents with high precision.
Built-in Isolation: Provides 2.1 kVRMS minimum isolation voltage between current leads and signal pins, ensuring safety.
Low Noise Design: Features a low-noise analog signal path for clear readings.
Adjustable Bandwidth: The device bandwidth can be customized using the external FILTER pin.
Fast Response: Offers a 5 µs output rise time, making it suitable for high-speed current monitoring.
Small Form Factor: Housed in a compact, low-profile SOIC8 package for easy PCB mounting.
Low Power Loss: Features an internal conductor resistance of only 1.2 mΩ.
Applications
Motor Control: Monitoring and managing current in DC or AC motor drivers.
Load Management: Tracking power consumption in household or industrial appliances.
Power Supplies: Used in switch-mode power supplies (SMPS) for current regulation.
Overcurrent Protection: Detecting and preventing faults in circuits by sensing excessive current.
Battery Chargers: Monitoring the charging and discharging cycles of batteries.
Parameters
Supply Voltage ($V_{CC}$): 5.0 V typical (Operating range: 4.5 V to 5.5 V).
Supply Current ($I_{CC}$): 10 mA typical.
Current Range Options: Available in ±5 A, ±20 A, and ±30 A versions.
Output Sensitivity: 66 to 185 mV/A (depending on the model).
Bandwidth: 80 kHz.
Total Output Error: 1.5% at an ambient temperature of 25°C.
Operating Temperature: -40°C to 85°C.
Isolation Voltage: 2100 VAC.
External Links:
Google Sites
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