Product Overview
The Allegro ACS718 is a highly isolated, economical current sensor IC designed for AC or DC current sensing in industrial, commercial, and communication systems. Its small, low-profile SOICW16 wide-body package is ideal for space-constrained applications while providing the necessary creepage and clearance for high isolation. The device features a low-offset, linear Hall sensor with a low-resistance (0.85 m typical) copper conduction path, enabling efficient current sensing with minimal power loss. It is factory-calibrated for accuracy and offers a proportional analog output voltage. Typical applications include motor control, load detection and management, switched-mode power supplies, and overcurrent fault protection. The ACS718 is certified to IEC/UL 60950-1 standards for dielectric strength and isolation levels.
Product Attributes
- Brand: Allegro
- Certifications: IEC/UL 60950-1 Ed. 2 (Dielectric Strength = 4800 Vrms, Basic Isolation = 1550 Vpeak, Reinforced Isolation = 800 Vpeak), CB Certificate Number: US-32210-M1-UL, TV America Certificate Number: U8V 16 03 54214 040 CB 16 03 54214 039
- Package: 16-Pin SOICW (suffix MA)
- Material: Lead (Pb) free with 100% matte tin leadframe plating
Technical Specifications
| Characteristic | Symbol | Notes | Rating | Units |
|---|---|---|---|---|
| Supply Voltage | VCC | 4.5 - 5.5 | V | |
| Supply Current | ICC | VCC = 5 V, output open | - 7 - 9 | mA |
| Primary Conductor Resistance | RP | TA = 25C | - 0.85 - | m |
| Internal Bandwidth | BWi | Small signal 3 dB | - 40 - | kHz |
| Noise Density (Input Referenced) | IND | TA = 25C, CL = 1 nF | - 350 - | A(rms)/Hz |
| Input Referenced Noise | IN | BWi = 40 kHz, TA = 25C, CL = 1 nF | - 70 - | mA(rms) |
| Power-On Time | tPO | TA = 25C | - 35 - | s |
| Dielectric Strength Test Voltage | VISO | Agency type tested for 60 seconds per IEC/UL 60950-1 (2nd Edition). Production tested for 1 second at 3000 VRMS in accordance with IEC/UL 60950-1 (2nd Edition). | 4800 | VRMS |
| Working Voltage for Basic Isolation | VWVBI | Maximum approved working voltage for basic (single) isolation according IEC/UL 60950-1 (2nd Edition). | 1550 | VPK or VDC |
| Working Voltage for Reinforced Isolation | VWVRI | Maximum approved working voltage for reinforced isolation according to IEC/UL 60950-1 (2nd Edition) | 800 | VPK or VDC |
| Clearance | Dcl | Minimum distance through air from IP leads to signal leads. | 7.5 | mm |
| Creepage | Dcr | Minimum distance along package body from IP leads to signal leads. | 8.2 | mm |
| Distance Through Insulation | DTI | Minimum internal distance through insulation | 90 | m |
| Comparative Tracking Index | CTI | Material Group II | 400 to 599 | V |
| Human Body Model ESD | VHBM | 8 | kV | |
| Charged Device Model ESD | VCDM | 1 | kV | |
| Model: ACS718KMATR-10B-T | IP | 10 | A | |
| Sens (Typ) at VCC = 5.0 V | 200 | mV/A | ||
| TA (C) | 40 to 125 | C | ||
| Model: ACS718KMATR-20B-T | IP | 20 | A | |
| Sens (Typ) at VCC = 5.0 V | 100 | mV/A | ||
| TA (C) | 40 to 125 | C |
2106080106_ALLEGRO-ACS718KMATR-20B-T_C2654892.pdf
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