Date: 23/10/2009
120 kHz bandwidth, high-voltage isolation current sensor IC from Allegro
Allegro has introduced the ACS710, a new high-voltage isolation current sensor IC with 120 kHz bandwidth with integrated over current detection, and suitable for current sensing applications such as industrial, commercial, and communications systems.
The ACS710 device consists of a linear Hall sensor integrated circuit with a copper conduction path located near the surface of the silicon die. Applied current flows through the copper conduction path, and the analog output voltage from the Hall sensor IC linearly tracks the magnetic field generated by the applied current. The accuracy of the ACS710 is maximized with this configuration because the Hall element is situated in close proximity to the current to be measured.
High-level immunity to the current conductor dV/dt and stray electric fields, offered by Allegro's integrated shield technology, offers low ripple at output and low offset drift in high-side, high-voltage applications.
The key features and specifications for the Allegro's ACS710 current sensor IC are,
1 m Ohm primary conductor resistance for low power loss
High isolation voltage, suitable for line-powered applications
User-adjustable Overcurrent Fault level
Overcurrent Fault signal typically responds to an overcurrent condition in <2 µs
Integrated shield virtually eliminates capacitive coupling from current conductor to die due to high dV/dt voltage transients
Filter pin capacitor improves resolution in low bandwidth applications
3 to 5.5 V, single supply operation
Factory trimmed sensitivity and quiescent output voltage
Chopper stabilization results in stable quiescent output voltage
Ratiometric output from supply voltage
The suggested applications for Allegro's ACS710 current sensor IC include Motor control and protection, Load management and overcurrent detection, Power conversion and battery monitoring / UPS systems.
For more details visit www.allegromicro.com
Editorial Product Rating: Average Plus