Allegro MicroSystems – Conf idential Information
ACS37630
Linear Vertical Hall-Effect Sensor IC for U-Core Current Sensing
with High-Bandwidth (250 kHz) and Analog Output
FEATURES AND BENEFITS
• Vertical Hall technology for sensing parallel to package
surface, ideal for U-core applications
• Contactless, noninvasive current sensing
• Eliminates the need for C-cores for easy assembly
• Suited for applications where current flows through a
busbar or printed circuit board (PCB)
• Factory-programmed temperature compensation (TC)
provides low thermal drift
• Sensitivity ±0.7% (typical)
• Offset ±5 mV (typical)
• Fast response time of 1.6 μs (typical)
• High operating bandwidth up to 250 kHz
• Low-bandwidth mode (50 kHz) for reduced output noise
• Wide sensitivity range factory-programmable from
1 mV/G to 8.8 mV/G (10 mV/mT to 88 mV/mT)
• Wide measurement range up to 2000 G (200 mT)
• Analog ratiometric output
• Wide ambient operating temperature: –40°C to 150°C
• Monolithic Hall integrated circuit (IC) for high reliability
• Surface-mount, small-footprint, low-profile, 8-pin small-
outline integrated circuit (SOIC8) package
• AEC-Q100 Grade 0, automotive qualified
PACKAGE: 8-Pin SOIC (Suffix OL)
OL Package
DESCRIPTION
The ACS37630 is a contactless current sensor designed for
applications where current flows through a busbar or PCB. When
used with a U-core concentrator (Figure 1), high immunity to
stray fields can be achieved, as well as simplified mechanical
assembly relative to a traditional C-core current sensor. For
high-frequency applications, laminated U-cores should be used.
The sensor uses the Allegro high-precision vertical Hall
technology (VHT) to detect magnetic fields parallel to the
package surface (Figure 2), while maintaining a monolithic
die for high robustness in harsh automotive environments.
The ACS37630 is factory-trimmed over temperature. Sensitivity,
offset, bandwidth (250 kHz or 50 kHz), output-voltage clamping,
and reaction of the sensor to overvoltage and undervoltage
events are configurable. If end-of-line offset and/or sensitivity
trimming is required, contact an Allegro representative for
guidance.
TYPICAL APPLICATIONS
• High-voltage traction motor inverter for extended
electric vehicles (xEVs)
• 48 V/12 V auxiliary inverter
• Power-distribution unit (PDU)
• Battery-disconnect unit (BDU)
• Heterogeneous redundant battery monitoring
• Smart-fuse applications
• Green energy
• Power supply
Figure 1: U-Core Application Schematic
ACS37630-DS, Rev. 1
MCO-0001852
Figure 2: Sensed Field Direction
April 17, 2025
