Product Overview
The Allegro ACS71240 is an economical and precise automotive-grade, galvanically isolated 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 a proprietary amplifier and filter design for industry-leading noise performance and improved bandwidth up to 120 kHz. The device offers differential sensing for high accuracy in noisy environments, integrated shield for suppressing output noise from high dv/dt transients, and patented integrated digital temperature compensation. It provides a nonratiometric output for immunity to noisy supplies, single-supply operation, and an integrated overcurrent FAULT comparator with ultrafast response time for short-circuit event detection. Available in small, low-profile surface-mount packages (QFN-12 and SOIC-8), the ACS71240 is AEC-Q100 automotive qualified and UL certified (SOIC-8 only).
Product Attributes
- Brand: Allegro
- Certifications: AEC-Q100 automotive qualified, UL certified (SOIC-8 only), CB Certificate Number: US-22334-A3-UL, TV America Certificate Number: U8V 14 11 54214 032
- Material: Pb-free construction with tin-silver-based solder bumps available (-S variants)
- Package Options: QFN-12 (EXB package), SOIC-8 (LCB package)
Technical Specifications
| Part Number | Supply Voltage, VCC (V) | Optimized Accuracy Range, IPR (A) | Sensitivity (Typ) (mV/A) | Fault Trip Level (A) | Operating Ambient Temperature Range, TA (C) | Package | Packing |
|---|---|---|---|---|---|---|---|
| ACS71240KEXBLT-010B3 | 3.3 | 10 | 132 | 10 | 40 to 125 | 12-contact QFN (EXB) | 1500 pcs/7-inch reel |
| ACS71240KEXBLT-010B3-115 | 3.3 | 10 | 132 | 11.5 | 40 to 125 | 12-contact QFN (EXB) | 1500 pcs/7-inch reel |
| ACS71240KEXBLT-030B3 | 3.3 | 30 | 44 | 30 | 40 to 125 | 12-contact QFN (EXB) | 1500 pcs/7-inch reel |
| ACS71240KEXBLT-030B3-167L | 3.3 | 30 | 44 | 50, latched | 40 to 125 | 12-contact QFN (EXB) | 1500 pcs/7-inch reel |
| ACS71240KEXBLT-050B3 | 3.3 | 50 | 26.4 | 50 | 40 to 125 | 12-contact QFN (EXB) | 1500 pcs/7-inch reel |
| ACS71240KEXBLT-050B3-120 | 3.3 | 50 | 26.4 | 60 | 40 to 125 | 12-contact QFN (EXB) | 1500 pcs/7-inch reel |
| ACS71240KEXBLT-010B5 | 5 | 10 | 200 | 10 | 40 to 125 | 12-contact QFN (EXB) | 1500 pcs/7-inch reel |
| ACS71240KEXBLT-020B5 | 5 | 20 | 100 | 20 | 40 to 125 | 12-contact QFN (EXB) | 1500 pcs/7-inch reel |
| ACS71240KEXBLT-020B5-150L | 5 | 20 | 100 | 30, latched | 40 to 125 | 12-contact QFN (EXB) | 1500 pcs/7-inch reel |
| ACS71240KEXBLT-030B5 | 5 | 30 | 66 | 30 | 40 to 125 | 12-contact QFN (EXB) | 1500 pcs/7-inch reel |
| ACS71240KEXBLT-045B5 | 5 | 45 | 44.4 | 45 | 40 to 125 | 12-contact QFN (EXB) | 1500 pcs/7-inch reel |
| ACS71240KEXBLT-050B5 | 5 | 50 | 40 | 50 | 40 to 125 | 12-contact QFN (EXB) | 1500 pcs/7-inch reel |
| ACS71240KEXBLT-050U5 | 5 | 0 50 | 80 | 50 | 40 to 125 | 12-contact QFN (EXB) | 1500 pcs/7-inch reel |
| ACS71240LLCBTR-010B3 | 3.3 | 10 | 132 | 10 | 40 to 150 | 8-pin SOIC (LCB) | 3000 pcs/13-inch reel |
| ACS71240LLCBTR-025B3 | 3.3 | 25 | 55 | 25 | 40 to 150 | 8-pin SOIC (LCB) | 3000 pcs/13-inch reel |
| ACS71240LLCBTR-030B3 | 3.3 | 30 | 44 | 30 | 40 to 150 | 8-pin SOIC (LCB) | 3000 pcs/13-inch reel |
| ACS71240LLCBTR-050B3 | 3.3 | 50 | 26.4 | 50 | 40 to 150 | 8-pin SOIC (LCB) | 3000 pcs/13-inch reel |
| ACS71240LLCBTR-020U5 | 5 | 0 20 | 200 | 20 | 40 to 150 | 8-pin SOIC (LCB) | 3000 pcs/13-inch reel |
| ACS71240LLCBTR-045B5 | 5 | 45 | 44.4 | 45 | 40 to 150 | 8-pin SOIC (LCB) | 3000 pcs/13-inch reel |
| ACS71240LLCBTR-050B5 | 5 | 50 | 40 | 50 | 40 to 150 | 8-pin SOIC (LCB) | 3000 pcs/13-inch reel |
| ACS71240LLCBTR-050U5 | 5 | 0 50 | 80 | 50 | 40 to 150 | 8-pin SOIC (LCB) | 3000 pcs/13-inch reel |
| General Specifications | |||||||
| Primary Conductor Resistance (RIP) | QFN-12: 0.6 m (typ) | SOIC-8: 1.2 m (typ) | |||||
| Bandwidth (BW) | 120 kHz (small signal, -3 dB) | ||||||
| Response Time (tRESPONSE) | 4 s (typ) | ||||||
| Propagation Delay (tpd) | 1.6 s (typ) | ||||||
| Rise Time (tr) | 3 s (typ) | ||||||
| Output Slew Rate (SR) | 0.53 V/s (typ) | ||||||
| Power-On Time (tPO) | 80 s (typ) | ||||||
| FAULT Response Time (tFAULT) | 1.5 s (typ) | ||||||
| Zero-Current Output Voltage (VIOUT(Q)) | Bidirectional: 1.65 V (3.3V VCC), 2.5 V (5V VCC) | Unidirectional: 0.5 V (5V VCC), 0.33 V (3.3V VCC) | |||||
| Maximum Continuous Current (ICMAX) | QFN-12: 60 A | SOIC-8: 55 A | |||||
| Maximum Junction Temperature (TJ(MAX)) | 165 C | ||||||
| Isolation Characteristics (QFN-12) | Working Voltage for Functional Isolation: 100 VPK | ||||||
| Isolation Characteristics (SOIC-8) | Dielectric Surge Strength: 6000 V, Dielectric Strength: 2400 VRMS, Working Voltage for Basic Isolation: 420 VPK / 297 VRMS | ||||||
2509221739_ALLEGRO-ACS71240LLCBTR-020U5_C29322242.pdf
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