DC to 5 MHz Current Sensor With Reference or Fault Output

The ACS37030 and ACS37032 are fully integrated current sensor IC that senses current flowing through the primary conductor. There are two signal paths utilized, a Hall-effect element path to capture DC and low frequency current information, and an inductive coil path to capture high frequency current information. These two paths are combined to allow for sensing of a wide frequency band with a single device.

The properties of the coil increase signal to noise ratio (SNR) as frequency increases, minimizing noise seen at the output. The internal construction provides high isolation by magnetically coupling the field generated by current flow in the conductor to the fully monolithic Hall and coil IC. The current is sensed differentially by two Hall plates and two coils that subtract out interfering common-mode magnetic fields. The ACS37030 features a zero current reference and the ACS37032 features an overcurrent fault with internal pull up.

The ACS37030 and the ACS37032 are offered in two fused-lead SOIC-6 package options. The LZ package has a lower conductor resistance versus standard SOIC-8 packages and supports higher isolation of up to 840VRMS basic isolation or 420VRMS reinforced isolation. The MY package is a widebody SOIC-6 package that supports a similar reinforced isolation rating to comparable SOICW-16 packages in just half the size.