CODING INTERNATIONAL CO LTD

Allegro MicroSystems’ two high-performance, low-noise 2100-Vrms isolation current sensors, the ACS712 (bidirectional) and ACS713 (unidirectional), provide lower noise and better accuracy than previous generation current sensors. These sensors include an internal shield, which effectively attenuates high dV/dt transients over the leadframe causeing this to be solution idea for motor control and high side current sense applications.

The ACS712 provides economical and precise solutions for ac or dc current sensing; the ACS713 provides dc current sensing only. Both devices contain an exact, low-offset, linear Hall sensor circuit which has a 1.2-mΩ copper conduction path located near the top of the die. Applied current flowing through this copper conduction path generates a magnetic field which can be sensed through the integrated Hall IC and converted to a proportional voltage.

Device accuracy is optimized over the proximity in the magnetic signal on the Hall transducer. An exact, proportional voltage is supplied through the low-offset, chopper-stabilized BiCMOS Hall IC, that is programmed for accuracy after packaging. Accessible in an 8-pin SOIC package, pricing both for parts is $1.61 in 1000-piece quantities.