Product Overview
The Allegro ACS71240 is an economical and precise automotive-grade current sensor IC designed for AC or DC current sensing in industrial, automotive, commercial, and communications applications. It features a low-offset linear Hall sensor with an integrated copper conduction path, offering low power loss and high efficiency. The device provides high accuracy in noisy environments through differential sensing and includes an integrated fault comparator for overcurrent detection with ultrafast response times. Available in small, low-profile surface-mount packages (QFN-12 and SOIC-8), the ACS71240 offers galvanic isolation and common-mode field rejection.
Product Attributes
- Brand: Allegro
- Certifications: AEC-Q100 automotive qualified, UL certified package (SOIC-8 only)
- Package Options: QFN-12 (EXB package), SOIC-8 (LCB package)
- Lead Construction: Pb-free options available (-S part numbers)
Technical Specifications
| Model/Part Number | Supply Voltage (VCC) | Optimized Accuracy Range (IPR) | Sensitivity (Typ) | Fault Trip Level (Typ) | Operating Ambient Temperature Range (TA) | Primary Conductor Resistance (Typ) | Bandwidth | Response Time (Typ) |
|---|---|---|---|---|---|---|---|---|
| ACS71240KEXBLT-010B3 | 3.3 V | 10 A | 132 mV/A | 10 A | 40 to 125 C | 0.6 m (QFN-12) | 120 kHz | 4 s |
| ACS71240KEXBLT-030B3 | 3.3 V | 30 A | 44 mV/A | 30 A | 40 to 125 C | 0.6 m (QFN-12) | 120 kHz | 4 s |
| ACS71240KEXBLT-050B3 | 3.3 V | 50 A | 26.4 mV/A | 50 A | 40 to 125 C | 0.6 m (QFN-12) | 120 kHz | 4 s |
| ACS71240KEXBLT-010B5 | 5 V | 10 A | 200 mV/A | 10 A | 40 to 125 C | 0.6 m (QFN-12) | 120 kHz | 4 s |
| ACS71240KEXBLT-020B5 | 5 V | 20 A | 100 mV/A | 20 A | 40 to 125 C | 0.6 m (QFN-12) | 120 kHz | 4 s |
| ACS71240KEXBLT-030B5 | 5 V | 30 A | 66 mV/A | 30 A | 40 to 125 C | 0.6 m (QFN-12) | 120 kHz | 4 s |
| ACS71240KEXBLT-045B5 | 5 V | 45 A | 44.4 mV/A | 45 A | 40 to 125 C | 0.6 m (QFN-12) | 120 kHz | 4 s |
| ACS71240KEXBLT-050B5 | 5 V | 50 A | 40 mV/A | 50 A | 40 to 125 C | 0.6 m (QFN-12) | 120 kHz | 4 s |
| ACS71240KEXBLT-050U5 | 5 V | 0 - 50 A | 80 mV/A | 50 A | 40 to 125 C | 0.6 m (QFN-12) | 120 kHz | 4 s |
| ACS71240LLCBTR-010B3 | 3.3 V | 10 A | 132 mV/A | 10 A | 40 to 150 C | 1.2 m (SOIC-8) | 120 kHz | 4 s |
| ACS71240LLCBTR-025B3 | 3.3 V | 25 A | 55 mV/A | 25 A | 40 to 150 C | 1.2 m (SOIC-8) | 120 kHz | 4 s |
| ACS71240LLCBTR-030B3 | 3.3 V | 30 A | 44 mV/A | 30 A | 40 to 150 C | 1.2 m (SOIC-8) | 120 kHz | 4 s |
| ACS71240LLCBTR-050B3 | 3.3 V | 50 A | 26.4 mV/A | 50 A | 40 to 150 C | 1.2 m (SOIC-8) | 120 kHz | 4 s |
| ACS71240LLCBTR-020U5 | 5 V | 0 - 20 A | 200 mV/A | 20 A | 40 to 150 C | 1.2 m (SOIC-8) | 120 kHz | 4 s |
| ACS71240LLCBTR-045B5 | 5 V | 45 A | 44.4 mV/A | 45 A | 40 to 150 C | 1.2 m (SOIC-8) | 120 kHz | 4 s |
| ACS71240LLCBTR-050B5 | 5 V | 50 A | 40 mV/A | 50 A | 40 to 150 C | 1.2 m (SOIC-8) | 120 kHz | 4 s |
| ACS71240LLCBTR-050U5 | 5 V | 0 - 50 A | 80 mV/A | 50 A | 40 to 150 C | 1.2 m (SOIC-8) | 120 kHz | 4 s |
| Common Characteristics | ||||||||
| Supply Current (ICC) | 5 V variant: 10 mA (typ) 3.3 V variant: 7.5 mA (typ) | |||||||
| Primary Conductor Resistance (RIP) | QFN-12: 0.6 m (typ) SOIC-8: 1.2 m (typ) | |||||||
| FAULT Response Time (tFAULT) | 1.5 s (typ) | |||||||
| Power-On Time (tPO) | 80 s (typ) |
2510091532_ALLEGRO-ACS71240KEXBLT-050B5_C29650380.pdf
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