The ACS712 is an economical and precise solution for AC or DC current sensing
in an industrial and domestic system. Typical applications include
motor control, load detection and management, switched-mode power
supplies, and overcurrent fault protection. This product should not be
used for automotive applications.
The device consists of a precise, low-offset, linear Hall
sensor circuit with a copper conduction path located near the surface of
the die. Applied current flowing through this copper conduction path
generates a magnetic field which is sensed by the integrated Hall IC and
converted into a proportional voltage. Device accuracy is optimized
through the close proximity of the magnetic signal to the Hall
transducer. A precise, proportional voltage is provided by the
low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for
accuracy after packaging.
The output of the device has a positive slope (>VIOUT(Q))
when an increasing current flows through the primary copper conduction
path (from pins 1 and 2, to pins 3 and 4), which is the path used for
current sensing. The internal resistance of this conductive path is
1.2 mΩ typical, providing low power loss. The thickness of the copper
conductor allows survival of the device at up to 5× overcurrent
conditions. The terminals of the conductive path are electrically
isolated from the sensor IC leads (pins 5 through 8). This allows the
ACS712 current sensor IC to be used in applications requiring electrical
isolation without the use of opto-isolators or other costly isolation
techniques.
The current sensor chips: ACS712ELC-30A;
Pin 5V power supply, on-board power indicator;
The module can measure the positive and negative 30 amps, corresponding to the analog output 100mV / A;
No test current through the output voltage is VCC / 2;
PCB board size: 31 (mm) x13 (mm);
Note: ACS712 is based on the principle of the Hall test, please use this field to avoid an impact!
