ALLEGRO ACS37030LLZATR-040B3

The ACS37030/2 is a fully integrated current sensor IC that senses current flowing through the primary conductor. Two signal paths are used: 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 summed to allow for sensing of a wide frequency band with a single device. The properties of the coil increase 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 IC has no physical connection to the integrated current conductor and provides a 3500 V_RMS isolation voltage between the primary and secondary signal leads of the package. This high rating provides a basic working voltage of 840 V_RMS. Both zero current reference (ACS37030) and overcurrent fault with internal pull up (ACS37032) options are available. The ACS37030/32 is provided in a six-lead custom SOIC surface mount package with the current conductor leads formed together for a reduced resistance of 0.6 mΩ. The leadframe is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the device is Pb-free. The ACS37030/32 outputs an analog signal that varies linearly with the bidirectional AC or DC primary current within the range specified.

• High operating bandwidth for fast control loops or where high-speed switching currents are monitored
• DC to 5 MHz bandwidth
• 40 ns typical response time
• High accuracy and low noise
• ±2% sensitivity error over temperature
• ±10 mV maximum offset voltage over temperature
• 50 mA_RMS input referred noise
• 3.3 V non-ratiometric supply operation
• Differential sensing immune to external magnetic fields
• VREF output voltage for differential routing in noisy application environments (ACS37030)
• FAULT output for fast open drain overcurrent detection (ACS37032)
• Highly isolated compact surface-mount package
• 3500 V_RMS rated isolation voltage
• 840 V_RMS / 1188 V_DC basic isolation voltages
• 420 V_RMS / 594 V_DC reinforced isolation voltages
• Wide operating temperature, -40℃ to 150℃
• AEC-Q100 Grade 0 qualified