Product Overview
The Allegro ACS725 is an economical and precise 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, reducing board area and costs. 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 an integrated shield for suppressed output noise. With a high-bandwidth analog output of 120 kHz and patented digital temperature compensation, it offers accurate, fast response times in control applications. The ACS725 provides galvanically isolated current sensing without the need for costly isolation techniques, making it suitable for high-side applications.
Product Attributes
- Brand: Allegro
- Package: 8-Pin SOIC (LC)
- Certifications: AEC-Q100 qualified, CB Certificate Number: US-32848-UL, TV America Certificate Number: U8V 18 02 54214 041, CB 14 11 54214 031
- Material: Leadframe plated with 100% matte tin; internally Pb-free (except for flip-chip high-temperature Pb-based solder balls)
Technical Specifications
| Model | Current Sensing Range (IPR) | Sensitivity (Typ. mV/A) | Operating Temperature (TA) | Zero Current Output Voltage (VIOUT(Q)) | Total Output Error (ETOT) (Typ. %) | Bandwidth (BW) | Primary Conductor Resistance (RIP) (Typ.) |
|---|---|---|---|---|---|---|---|
| ACS725LLCTR-05AB-T | 5 A | 264 | 40 to 150 C | VCC 0.5 | 0.9 (25-150C) / 4 (-40-25C) | 120 kHz | 1.2 m |
| ACS725LLCTR-10AB-T | 10 A | 132 | 40 to 150 C | VCC 0.5 | 0.8 (25-150C) / 4 (-40-25C) | 120 kHz | 1.2 m |
| ACS725LLCTR-10AU-T | 0 10 A | 264 | 40 to 150 C | VCC 0.1 | 0.9 (25-150C) / 4 (-40-25C) | 120 kHz | 1.2 m |
| ACS725LLCTR-20AB-T | 20 A | 66 | 40 to 150 C | VCC 0.5 | 0.8 (25-150C) / 4 (-40-25C) | 120 kHz | 1.2 m |
| ACS725LLCTR-20AB-T-H | 20 A | 66 | 40 to 150 C | VCC 0.5 | 0.7 (25-150C) / 1.5 (-40-25C) | 120 kHz | 1.2 m |
| ACS725LLCTR-20AU-T | 0 20 A | 132 | 40 to 150 C | VCC 0.1 | 0.8 (25-150C) / 4 (-40-25C) | 120 kHz | 1.2 m |
| ACS725LLCTR-30AB-T | 30 A | 44 | 40 to 150 C | VCC 0.5 | 0.7 (25-150C) / 4 (-40-25C) | 120 kHz | 1.2 m |
| ACS725LLCTR-30AB-T-H | 30 A | 44 | 40 to 150 C | VCC 0.5 | 0.7 (25-150C) / 1.5 (-40-25C) | 120 kHz | 1.2 m |
| ACS725LLCTR-30AU-T | 0 30 A | 88 | 40 to 150 C | VCC 0.1 | 0.8 (25-150C) / 4 (-40-25C) | 120 kHz | 1.2 m |
| ACS725LLCTR-40AB-T | 40 A | 33 | 40 to 150 C | VCC 0.5 | 1 (25-150C) / 4 (-40-25C) | 120 kHz | 1.2 m |
| ACS725LLCTR-50AB-T | 50 A | 26.4 | 40 to 150 C | VCC 0.5 | 1 (25-150C) / 4 (-40-25C) | 120 kHz | 1.2 m |
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 3 | 3.3 | 3.6 | V | |
| Supply Current | ICC | VCC = 3.3 V, output open | 10 | 14 | mA | |
| Primary Conductor Resistance | RIP | TA = 25C | 1.2 | m | ||
| Dielectric Surge Strength Test Voltage | VSURGE | Tested 5 pulses at 2/minute in compliance to IEC 61000-4-5 1.2 s (rise) / 50 s (width) | 6000 | V | ||
| Dielectric Strength Test Voltage | VISO | Agency type-tested for 60 seconds per UL standard 60950-1 (edition 2). Production tested at VISO for 1 second, in accordance with UL 60950-1 (edition 2). | 2400 | VRMS | ||
| Working Voltage for Basic Isolation | VWVBI | Maximum approved working voltage for basic (single) isolation according UL 60950-1 (edition 2) | 420 Vpk or VDC / 297 Vrms | |||
| 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 | ||
| Rise Time | tr | IP = IP(max), TA = 25C, CL = 1 nF | 3 | s | ||
| Propagation Delay | tpd | IP = IP(max), TA = 25C, CL = 1 nF | 2 | s | ||
| Response Time | tRESPONSE | IP = IP(max), TA = 25C, CL = 1 nF | 4 | s | ||
| Power-On Time | tPO | Output reaches 90% of steady-state level, TA = 25C, IP = IPR(max) applied | 80 | s |
Typical Applications
- Motor control
- Load detection and management
- Switched-mode power supplies
- Overcurrent fault protection
2410010100_ALLEGRO-ACS725LLCTR-50AB-T_C2155515.pdf
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