Allegro ACS724 Current Sensor IC
Product Overview
The Allegro ACS724 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 systems. Its small, low-profile SOIC8 package is ideal for space-constrained applications, offering cost savings through reduced board area. The device features differential Hall sensing for common-mode field rejection, a low-resistance primary conductor (1.2 m typical) for minimal power loss and high inrush current capability, and industry-leading noise performance with improved bandwidth. Typical applications include motor control, load detection and management, switched-mode power supplies, and overcurrent fault protection.
Product Attributes
- Brand: Allegro
- Package: 8-Pin SOIC (suffix LC)
- AEC-Q100 qualified
- Certifications: CB Certificate Number: US-32848-UL, TV America Certificate Number: U8V 18 02 54214 041, CB 14 11 54214 031
- Leadframe plating: 100% matte tin
- Solder bumps: Pb-free or high-temperature Pb-based options available (-S for Pb-free, -T for Pb-based)
Technical Specifications
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 4.5 | 5 | 5.5 | V | |
| Supply Current | ICC | VCC = 5 V, output open | 10 | 14 | mA | |
| Primary Conductor Resistance | RIP | TA = 25C | 1.2 | m | ||
| Bandwidth | BW | Small signal 3 dB; CL = 1 nF | 120 | kHz | ||
| Operating Ambient Temperature Range | TA | 40 | 150 | C | ||
| Junction Temperature (max) | TJ(max) | 165 | C | |||
| Dielectric Surge Strength Test Voltage | VSURGE | Tested 5 pulses at 2/minute in compliance to IEC 61000-4-5 | 6000 | V | ||
| Dielectric Strength Test Voltage | VISO | Agency type-tested for 60 seconds per UL standard 60950-1 | 2400 | VRMS | ||
| Working Voltage for Basic Isolation | VWVBI | Maximum approved working voltage for basic isolation according to UL 60950-1 | 420 | Vpk or VDC | ||
| Clearance | Dcl | Minimum distance through air from IP leads to signal leads. | 4.2 | mm | ||
| Creepage | Dcr | Minimum distance along package body from IP leads to signal leads. | 4.2 | mm | ||
| Package Thermal Resistance (Junction to Ambient) | RJA | Mounted on Allegro 85-0740 evaluation board with 1500 mm of 4 oz. copper | 23 | C/W | ||
| Selection Guide Variants | ||||||
| Part Number | IPR (A) | Sens (Typ) at VCC = 5 V (mV/A) | TA (C) | Packing | ||
| ACS724LLCTR-2P5AB-S/-T | 2.5 | 800 | 40 to 150 | Tape and Reel, 3000 pieces per reel | ||
| ACS724LLCTR-05AU-S/-T | 0 5 | 800 | 40 to 150 | Tape and Reel, 3000 pieces per reel | ||
| ACS724LLCTR-05AB-S/-T | 5 | 400 | 40 to 150 | Tape and Reel, 3000 pieces per reel | ||
| ACS724LLCTR-10AU-S/-T | 0 10 | 400 | 40 to 150 | Tape and Reel, 3000 pieces per reel | ||
| ACS724LLCTR-10AB-S/-T | 10 | 200 | 40 to 150 | Tape and Reel, 3000 pieces per reel | ||
| ACS724LLCTR-20AU-S/-T | 0 20 | 200 | 40 to 150 | Tape and Reel, 3000 pieces per reel | ||
| ACS724LLCTR-20AB-S/-T | 20 | 100 | 40 to 150 | Tape and Reel, 3000 pieces per reel | ||
| ACS724LLCTR-30AU-S/-T | 0 30 | 133 | 40 to 150 | Tape and Reel, 3000 pieces per reel | ||
| ACS724LLCTR-30AB-S/-T | 30 | 66 | 40 to 150 | Tape and Reel, 3000 pieces per reel | ||
| ACS724LLCTR-50AB-S/-T | 50 | 40 | 40 to 150 | Tape and Reel, 3000 pieces per reel | ||
2506300954_ALLEGRO-ACS724LLCTR-2P5AB-T_C24010499.pdf
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