What is the difference between the basic and reinforced isolation voltage ratings?
Allegro® MicroSystems current sensor ICs are isolation-tested according to the IEC 60950 standard. The ACS714 and ACS715 devices have a 2100 VRMS rating for reinforced isolation and a 1500 VRMS rating for basic isolation. For reinforced insulation, this allows for a working voltage of up to 184 Vpeak or DC voltage. This allows for use on 110 VAC mains for reinforced applications. For basic isolation this translates to a working voltage of 354 Vpeak or DC voltage. This is suitable for use on 240 VAC circuits. Basic isolation voltage refers to isolation ratings for circuitry connected between line voltage and ground. Reinforced isolation voltage refers to isolation ratings for circuitry connected between line voltage and secondary electrical equipment that may have user contact. The following figure compares these specifications. For the ACS714 and ACS715, the key limitation is actually the creepage and clearance distance inherent in the SOIC8 package. To achieve higher isolation voltage
