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ACS71020 Power Monitoring IC

Allegro’s single-phase, isolated power monitoring IC with voltage zero crossing and overcurrent detection

Image of Allegro's ACS71020 power monitoring IC Allegro Microsystems' ACS71020 power monitoring IC greatly simplifies the addition of power monitoring to any AC/DC powered device. By making use of Allegro’s Hall effect-based, galvanically isolated, integrated current sensor technology, reinforced isolation can be achieved. The sensor can be powered from the same supply as the MCU, eliminating the need for multiple power supplies and digital isolation ICs.

The isolated current measurement is done by detecting the magnetic field from the integrated conductor, eliminating the need for external sense resistors, current transformers, or Rogowski coils. Two Hall plates are used for this measurement to deferentially sense the field, thus eliminating errors due to stray magnetic fields. Multiple parameters like bandwidth, averaging time, and fault levels are user-programmable.

The ACS71020 is provided in a small, low-profile, surface-mount SOIC-16 wide-body package. The ACS71020 is lead (Pb)-free, and is fully calibrated prior to shipment from the factory. Further customer calibration in application can improve accuracy.

Features
  • Reinforced isolation for use up to 517 VRMS line voltage
  • Capable of AC and DC key power measurements
  • VCC=3.3 V and 5 V, SPI, or I²C communication
  • ±15 A to ±90 A optimized current measuring range
    • 2X extended sensing range (±30 A to ±180 A)
  • Voltage zero crossing detection
  • Fault output and digital register; fault conditions:
    • Overcurrent fault
    • Over/under RMS voltage
Applications
  • IoT:
    • Smart appliances
    • Smart lighting
    • Smart plug
  • Line power monitor
  • Motor power monitor

ACS71020 Power Monitoring IC

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
SINGLE PHASE, ISOLATED, POWER MOACS71020KMABTR-015B5-SPISINGLE PHASE, ISOLATED, POWER MO973 - ImmediateView Details
SINGLE PHASE, ISOLATED, POWER MOACS71020KMABTR-030B3-SPISINGLE PHASE, ISOLATED, POWER MO1488 - ImmediateView Details
SINGLE PHASE, ISOLATED, POWER MOACS71020KMABTR-090B3-I2CSINGLE PHASE, ISOLATED, POWER MO1755 - ImmediateView Details
EVAL BOARD FOR ACS71020ASEK71020KMAB-030B3-I2CEVAL BOARD FOR ACS7102013 - ImmediateView Details
SINGLE PHASE, ISOLATED, POWER MOACS71020KMABTR-030B3-I2CSINGLE PHASE, ISOLATED, POWER MO3807 - ImmediateView Details
EVAL BOARD FOR ACS71020ASEK71020KMAB-090B3-I2CEVAL BOARD FOR ACS7102016 - ImmediateView Details
EVAL BOARD FOR ACS71020ASEK71020KMAB-030B3-SPIEVAL BOARD FOR ACS7102024 - ImmediateView Details
EVAL BOARD FOR ACS71020ASEK71020KMAB-015B5-SPIEVAL BOARD FOR ACS7102011 - ImmediateView Details
Published: 2018-10-16