ACS756 Hall Effect-Based Linear Current Sensor IC With 3 kVRMS Voltage Isolation

The ACS756 is a low-noise, open-loop current sensor with a 125 KHz bandwidth capability. The enhanced accuracy and speed make this device suitable for 50 to 100 A applications. This device takes advantage of the low-loss leadframe of Allegro's “CA” package and the fast response capability of an integrated core.

It also has an internal electrostatic shield. The electrostatic shield effectively shunts the effects of voltage transient spikes around the silicon and minimizes the voltage ripple on the output of the device. The result is a high-performance current sensing solution suitable for motor and inverter control, power supply control and protection, and other applications requiring high-side current sensing.

• Industry-leading noise performance through proprietary amplifier and filter design techniques
• Total output error 0.8% at TA = 25°C
• Small package size, with easy mounting capability
• Monolithic Hall IC for high reliability
• Ultra-low power loss: 130 µ? internal conductor resistance
• 3 kVRMS minimum isolation voltage from pins 1-3 to pins 4-5
• 3 to 5V, single supply operation
• 3 ?s output rise time in response to step input current
• 20 or 40 mV/A output sensitivity
• Output voltage proportional to AC or DC currents
• Factory-trimmed for accuracy
• Extremely stable output offset voltage
• Nearly zero magnetic hysteresis