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The ACS756SCB-100B-PFF-T Current Sensor IC provides an affordable and accurate solution for AC or DC current measurement in industrial, automotive, commercial and communication systems. The devices are packaged for user-friendly applications. Common applications include motor control, load detection and management, power supply and overcurrent fault protection.

The device consists of a low-bias precision linear Hall sensor circuit with a copper current path near the surface of the wafer. The current applied through the copper current path generates a magnetic field that can be sensed by the integrated Hall IC and converted into a proportional voltage. Device accuracy is optimised by placing the magnetic signal close to the Hall sensor. The precise proportional voltage is provided by a stable chopper-type low bias BiCMOS Hall IC that is factory programmed for accuracy.

When increasing the current in the primary copper conducting path (for current sensing) from terminal 4 to terminal 5, the output of the device has a positive slope (>VCC / 2). The internal resistance of this conductive path is 130 μΩ typical, with low power losses.

The thickness of the copper wire allows the device to operate at up to 5 times the overcurrent. The terminals of the current path are electrically insulated from the sensor pins (pins 1 to 3). This allows the ACS756 Sensor IC family to be used in applications that require electrical insulation but do not use photoinsulators or other expensive insulation techniques.

Key Features

Industry-leading noise performance through patented amplifier and filter design process

0.8% total output error rate at TA = 25°C

Small package size for easy installation

Highly reliable monolithic Hall ICs

Ultra-low power loss: 130 µΩ internal conduction resistance

Minimum isolation voltage of 3 kVRMS for pins 1-3 to 4-5

3.0 - 5.0 V, single-supply operation

Output rise time of 3 µs for stepped input currents

20 or 40 mV/A output sensitivity

Output voltage proportional to AC or DC current

Factory calibrated for accuracy

Extremely stable output offset voltage

Near-zero hysteresis

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