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. The device features differential sensing topology for common-mode stray magnetic field rejection, high isolation, and a fast response time (<2 s typical) for overcurrent fault detection. With a wide ambient operating temperature range (-40C to 150C) and AEC-Q100 Grade 0 automotive qualification, it is suitable for harsh automotive environments. Available in 120 kHz and 240 kHz bandwidth options, the ACS37612 is well-suited for inverter phase current sensing, load detection and management, power supplies, and DC/DC converters. Its low-profile 8-pin TSSOP package ensures suitability for space-constrained applications.
Product Attributes
- Brand: Allegro
- Package Type: 8-pin TSSOP (suffix LU)
- Lead Plating: 100% matte tin
- Certifications: AEC-Q100 Grade 0, automotive qualified
- Material: Lead (Pb) free
Technical Specifications
| Model/Part Number | Nominal Supply Voltage (V) | Differential Magnetic Input Range (G) | Sensitivity (Typ.) (mV/G) | Bandwidth (kHz) | Ambient Temperature (C) | Packing |
|---|---|---|---|---|---|---|
| ACS37612LLUATR-010B3 | 3.3 | 135 | 10 | 120 | -40 to 150 | 4000 pieces per 13-inch reel |
| ACS37612LLUATR-005B5 | 5 | 400 | 5 | 120 (default) / 240 (high) | -40 to 150 | |
| ACS37612LLUATR-010B5 | 5 | 200 | 10 | 120 (default) / 240 (high) | -40 to 150 | |
| ACS37612LLUATR-015B5 | 5 | 130 | 15 | 120 (default) / 240 (high) | -40 to 150 | |
| ACS37612LLUATR-015U5 | 5 | 0 to 265 | 15 | 120 (default) / 240 (high) | -40 to 150 |
Key Features & Benefits
- Eliminates need for concentrator core or shield
- Suited for applications where current flows through busbar or PCB
- 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 (TC) 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, non-invasive current sensing
- Very fast response time (<2 s typ)
- 3.3 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 inverter
- 48 V / 12 V auxiliary inverter
- Battery monitoring
- Overcurrent detection
- DC/DC converter
- Smart fuse
- Power distribution unit (PDU)
- Power supply
Electrical Characteristics (Example: ACS37612LLUATR-005B5)
| Characteristic | Symbol | Test Conditions | Min. | Typ. [1] | Max. | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 5 V nominal supply voltage variant | 4.5 | 5 | 5.5 | V |
| Supply Current | ICC | VCC(min) VCC VCC(max), VCC = 5 V, no load | 12 | 16 | mA | |
| Differential Magnetic Range | BDIFF | 400 | 400 | G | ||
| Sensitivity | Sens | VCC(min) VCC VCC(max) | 5 | mV/G | ||
| Sensitivity Error | ESENS | TA = 25C | 2 | 1 | 2 | % |
| Sensitivity Drift Over Temperature | SensTC | TA = 25C to 150C | 2 | 1 | 2 | % |
Package Outline Drawing
Package: LU, 8-Pin TSSOP
Dimensions: (Refer to Figure 25 for detailed dimensions in millimeters)
- Maximum Body Thickness: 1.10 mm
- Lead Pitch: 0.65 mm
- Body Width: 3.00 0.10 mm
- Body Length: 4.40 0.10 mm
- Active Area Depth: 0.36 mm REF
2201272330_ALLEGRO-ACS37612LLUALU-005B5_C1869999.pdf
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