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ACS71020

Allegro
Part Number ACS71020
Manufacturer Allegro
Description AC Power Monitoring
Published Sep 11, 2018
Detailed Description ACS71020 Single Phase, Isolated, AC Power Monitoring IC with Voltage Zero Crossing and Overcurrent Detection FEATURES A...
Datasheet PDF File ACS71020 PDF File

ACS71020
ACS71020

Overview
ACS71020 Single Phase, Isolated, AC Power Monitoring IC with Voltage Zero Crossing and Overcurrent Detection FEATURES AND BENEFITS • Accurate power monitoring for AC applications • UL certification for reinforced isolation up to 517 VRMS in a single package • Accurate measurements of active, reactive, and apparent power, as well as power factor • Separate RMS and instantaneous measurements for both voltage and current channels • 0.
85 mΩ primary conductor resistance for low power loss and high inrush current withstand capability • Dedicated voltage zero crossing pin • Overcurrent fault output pin • Hall-effect-based current measurement with common- mode stray field rejection • User-programmable undervoltage and overvoltage thresholds for input voltage as well as overcurrent fault thresholds • 1 kHz bandwidth • Current-sensing range from 0 to 90 A • Options for I2C or SPI digital interface protocols • User-programmable EEPROM and integrated charge pump • 16-bit voltage and current ADCs PACKAGE 16-pin SOICW (suffix MA) Not to scale DESCRIPTION The Allegro ACS71020 power monitoring IC greatly simplifies the addition of power monitoring to many AC powered systems.
The sensor may be powered from the same supply as the system’s MCU, eliminating the need for multiple power supplies and expensive digital isolation ICs.
The device’s construction includes a copper conduction path that generates a magnetic field proportional to applied current.
The magnetic field is sensed differentially to reject errors introduced by common mode fields.
Allegro’s Hall-effect-based galvanically isolated current sensing technology achieves reinforced isolation ratings in a small PCB footprint.
These features enable isolated current sensing without expensive Rogowski coils, oversized current transformers, isolated operational amplifiers, or the power loss of shunt resistors.
The ACS71020 power monitoring IC offers key power measurement parameters that can easily be accessed through its SPI or I...


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