Product Overview
The ACS37601LKTATN-001B5-LFT is a high-precision, ASIL C safety-rated programmable linear Hall-effect current sensor IC from Allegro MicroSystems. It is designed for core-based current sensing applications in electric vehicle (EV) powertrain systems, traction inverters, and battery management systems (BMS). The -001B5 variant offers ±2250 Gauss magnetic field range, enabling current measurements greater than 200A when paired with an appropriate magnetic core (C-core).
This device achieves 0.8% sensitivity error and less than 5mV offset error over the automotive temperature range, representing Allegro’s highest accuracy field current sensor. It supports both 5V and 3.3V supply voltages and features overcurrent detection, overtemperature protection, and built-in self-test capabilities required for ASIL D system integration. The LFT suffix indicates a lead-formed SIP package suitable for surface-mount assembly with high mechanical vibration tolerance.
Key Specifications
| Type | Programmable Linear Hall-Effect Current Sensor (Core-Based) |
| Magnetic Range | ±2250 Gauss (-001B5) |
| Sensitivity Error | ±0.8% (over temperature, typical) |
| Offset Error | < 5 mV (over temperature, typical) |
| Supply Voltage | 3.3V or 5V (3.0V ~ 5.5V) |
| Bandwidth | 240 kHz |
| Response Time | 2 μs (typical) |
| Temperature Range | -40°C ~ +150°C |
| Package | 4-pin SIP (KT package, lead-formed) |
| Safety Rating | ASIL B (per ISO 26262), capable of ASIL D systems |
| Features | Overcurrent fault, Overtemperature, Self-test, Reverse battery protection |
| Output | Analog voltage (ratiometric) |
Features
- ASIL C safety rated (ISO 26262)
- ±2250G magnetic field range (enables >200A measurement)
- 0.8% sensitivity error over temperature
- 240kHz bandwidth, 2μs response time
- 3.3V or 5V single supply operation
- Overcurrent fault output (OCF)
- Overtemperature detection
- Built-in self-test (BIST)
- Reverse battery protection
- 4-pin SIP lead-formed package (surface mount compatible)
- AEC-Q100 qualified (automotive grade)
- User programmable via EEPROM
Applications
- EV traction inverters and motor drives
- Battery management systems (BMS)
- On-board chargers (OBC)
- DC-DC converters in automotive systems
- High-precision current measurement >200A
- ASIL B / ASIL D safety systems
- Industrial motor control
- Solar inverters and power systems