Product Overview

The Allegro ACS37612 is a coreless, high-precision, Hall-effect current sensor IC designed for low-cost AC and DC current sensing solutions. It eliminates the need for external field concentrator cores or shields, making it ideal for applications with high currents flowing through busbars or PCB traces, up to hundreds of amps. The device features a differential sensing topology for excellent common-mode stray magnetic field rejection and high isolation due to its contactless nature. With bandwidth options of 120 kHz and 240 kHz, it is well-suited for demanding applications like inverter phase current sensing, load detection and management, power supplies, and DC/DC converters requiring fast switching and overcurrent fault detection. Its robust design, including a wide ambient operating temperature range (40C to 150C) and high ESD rating, makes it suitable for harsh automotive environments. The compact, low-profile 8-pin TSSOP package ensures suitability for space-constrained designs.

Product Attributes

• Brand: Allegro
• Package: 8-pin TSSOP (suffix LU)
• Certifications: AEC-Q100 Grade 0, automotive qualified
• Lead Material: Lead (Pb) free with 100% matte tin leadframe plating

Technical Specifications

Key Features and Benefits

• Eliminates the need for a concentrator core or shield.
• Suitable for applications with current flowing through busbars or PCB traces.
• Very wide sensing range (2.5 to 20 mV/G), ideal for sensing currents from <200 A to >1000 A.
• Factory-programmed segmented linear temperature compensation provides low thermal drift (Sensitivity 1% typ, Offset 3 mV typ).
• Differential Hall sensing rejects common-mode magnetic fields.
• High operating bandwidth: DC to 240 kHz.
• Contactless, lossless, and non-invasive current sensing.
• Very fast response time (<2 s typ).
• 3.3 V or 5.0 V single supply operation.
• Ratiometric output with unidirectional and bidirectional modes.
• Immune to mechanical stress.
• Monolithic Hall IC for high reliability.
• Wide ambient temperature range: 40C to 150C.
• Surface mount, small footprint, low-profile TSSOP8 package.

Typical Applications

• High voltage traction motor inverters
• 48 V / 12 V auxiliary inverters
• Battery monitoring
• Overcurrent detection
• DC/DC converters
• Smart fuses
• Power distribution units (PDUs)
• Power supplies

Electrical Characteristics (Selected)

Accuracy Performance (ACS37612LLUATR-005B5)

Accuracy Performance (ACS37612LLUATR-010B3)

Package Outline Drawing

Package: LU, 8-Pin TSSOP

Dimensions: (Refer to Figure 25 in source document for detailed drawing)

• Body dimensions: 6.40 mm BSC (max) x 4.40 mm 0.10 mm
• Pitch: 0.65 mm BSC (8x)
• Lead thickness: 0.10 mm to 0.25 mm
• Active Area Depth: 0.36 mm REF