Fast Response Hall Effect Current Sensor IC ALLEGRO ACS37612LLUATR-005B5 for Safety Critical Systems
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 suitable for safety-critical overcurrent fault detection. With a wide ambient operating temperature range and automotive qualification (AEC-Q100 Grade 0), it is well-suited for harsh automotive environments and space-constrained applications due to its low-profile 8-pin TSSOP package.
Product Attributes
- Brand: Allegro
- Package: 8-pin TSSOP (suffix LU)
- Certifications: AEC-Q100 Grade 0, automotive qualified
- Lead Finish: 100% matte tin leadframe plating
- Lead-Free: Yes
Technical Specifications
| Model/Part Number | Nominal Supply Voltage (V) | Differential Magnetic Input Range (G) | Sensitivity (Typ.) (mV/G) | Bandwidth (kHz) | Ambient Temperature Range (C) | Packing |
|---|---|---|---|---|---|---|
| ACS37612LLUATR-010B3 | 3.3 | 135 | 10 | 120 | 40 to 150 | 4000 pieces per 13-inch reel |
| ACS37612LLUATR-005B5 | 5 | 400 | 5 | 120 | 40 to 150 | |
| ACS37612LLUATR-010B5 | 5 | 200 | 10 | 120 | 40 to 150 | |
| ACS37612LLUATR-010B5-C | 5 | 200 | 10 | 120 | 40 to 150 | |
| ACS37612LLUATR-015B5 | 5 | 130 | 15 | 120 | 40 to 150 | |
| ACS37612LLUATR-015U5 | 5 | 0 to 265 | 15 | 120 | 40 to 150 |
Key Features & Benefits
- Eliminates the need for a concentrator core or shield.
- Suitable for applications where current flows through a busbar or PCB trace.
- Very wide sensing range (2.5 to 20 mV/G), ideal for currents from 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, non-invasive current sensing.
- Very fast response time (
- 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 Summary
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage (5 V variant) | VCC | 5 V nominal supply voltage variant | 4.5 | 5 | 5.5 | V |
| Supply Voltage (3.3 V variant) | VCC | 3.3 V nominal supply voltage variant | 3 | 3.3 | 3.6 | V |
| Supply Current | ICC | VCC(min) VCC VCC(max), no load | 12 | 16 | mA | |
| Power-On Time | tPO | TA = 25C | 70 | s | ||
| Internal Bandwidth (lowest) | BWi | CL = 1 nF, lowest bandwidth mode | 120 | kHz | ||
| Internal Bandwidth (highest) | BWi | CL = 1 nF, highest bandwidth mode | 240 | kHz | ||
| Response Time (BW=240 kHz) | tRESPONSE | TA = 25C, CL = 1 nF | 1.6 | s |
Absolute Maximum Ratings
| Characteristic | Symbol | Rating | Unit |
|---|---|---|---|
| Supply Voltage | VCC | 6.5 | V |
| Reverse Supply Voltage | VRCC | 0.5 | V |
| Output Voltage | VOUT | 6.5 | V |
| Reverse Output Voltage | VROUT | 0.5 | V |
| Maximum Junction Temperature | TJ(max) | 165 | C |
| Storage Temperature | Tstg | 65 to 165 | C |
Package Outline Drawing
LU, 8-Pin TSSOP Package
(Dimensions in millimeters)
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