Broadcom ACHS-719x family hall effect current sensors

The ACHS-719x product series is a fully integrated Hall Effect-based isolated linear current sensor device family designed for AC or DC current sensing in industrial, commercial, and communications systems. The family consists of products with a sensing current ranging from ±10 A to ±50 A. The devices offer a precise, low-offset, linear Hall circuit with a copper conduction path located near the surface of the die. Applied current generates a magnetic field that the Hall IC converts into a proportional voltage. Device accuracy is optimized through the use of differential Hall transducers.

Key features

• Wide Operating Temperature Range: from -40ºC to 110ºC
• Primary Conductor Resistance: 0.7 mΩ Typ.
• Sensing Current Ranges: ±10A, ±20A, ±30A, ±40A, and ±50A
• Output Sensitivity: from 40 to 185 mV/A

Additional features

• Low-resistance current conduction path
• Output voltage proportional to AC or DC currents
• Ratiometric output from supply voltage
• Single supply operation: 5.0 V
• Low noise analog signal path
• Device bandwidth is set via the filter pin:
  • 80 kHz typ. with 1 nF filter capacitor
• Factory-trimmed for high accuracy
• Extremely stable output offset voltage
• Near-zero magnetic hysteresis
• Total output error:
  • ≤ ±6% across the range from -40 to 110 °C
• >25 kV/µs common-mode transient immunity
• Small footprint, low profile SO-8 package
• Isolation voltage:
  • 3kVRMS, 1 minute
• Worldwide safety:
  • UL, CSA, IEC/EN 62368-1

Applications

• Low-Power Inverter Current Sensing
• Motor Phase and Rail Current Sensing
• Solar Inverters
• Chargers and Converters
• Switching Power Supplies
• eBikes

Extended Description

Device accuracy is optimized through the close proximity of the magnetic signal to the differential Hall transducers. A precise, proportional voltage is provided by the low-offset, chopper-stabilized CMOS Hall IC, which is programmed for accuracy after packaging. The output of the device has a positive slope (> VOUT(Q)) when an increasing current flows through the primary copper conduction path (from pins 1 - 2 to pins 3 - 4), which is the path used for current sampling.