Product Overview
The Allegro ACS725KMA is a high-accuracy, Hall-effect-based current sensor IC designed for AC or DC current sensing in industrial, commercial, and communication systems. Its compact SOIC16 package is ideal for space-constrained applications, offering cost savings through reduced board area. Key applications include motor control, load detection and management, switched-mode power supplies, and overcurrent fault protection. The device features differential Hall sensing for common-mode field rejection, patented digital temperature compensation for accuracy over temperature, and inherent isolation, eliminating the need for costly isolation techniques. It provides a low-offset, linear voltage output proportional to the sensed current, with a typical primary conductor resistance of 0.85 m for low power loss.
Product Attributes
- Brand: Allegro
- Package: 16-pin SOICW (suffix MA)
- Certifications: UL60950-1 (ed. 2) certified; CB Certificate Number: US-32210-M1-UL; TV America Certificate Number: U8V 16 03 54214 040, CB 16 03 54214 039
- Leadframe Material: 100% matte tin plating
- Device is Pb-free: Internally
Technical Specifications
| Characteristic | Model | Value | Unit | Notes |
|---|---|---|---|---|
| Current Sensing Range | ACS725KMATR-20AB | 20 | A | |
| Sensitivity | ACS725KMATR-20AB | 66 | mV/A | Typ. at VCC = 3.3 V |
| Current Sensing Range | ACS725KMATR-30AB | 30 | A | |
| Sensitivity | ACS725KMATR-30AB | 44 | mV/A | Typ. at VCC = 3.3 V |
| Current Sensing Range | ACS725KMATR-30AU | 0 30 | A | Unidirectional |
| Sensitivity | ACS725KMATR-30AU | 88 | mV/A | Typ. at VCC = 3.3 V |
| Operating Temperature Range | All | -40 to 125 | C | TA |
| Supply Voltage | All | 3 to 3.6 | V | Single supply operation |
| Primary Conductor Resistance | All | 0.85 | m | Typical |
| Dielectric Strength Test Voltage | All | 4.8 | kVRMS | UL60950-1 (ed. 2) |
| Basic Isolation Working Voltage | All | 1097 | VRMS | UL60950-1 (ed. 2) |
| Reinforced Isolation Working Voltage | All | 565 | VRMS | UL60950-1 (ed. 2) |
| Bandwidth | All | 120 | kHz | Internal, -3 dB, CL = 1 nF |
| Total Output Error | ACS725KMATR-20AB | 1 | % | Typ. at IPR(max), TA = 25C to 125C |
| Total Output Error | ACS725KMATR-30AB | 1 | % | Typ. at IPR(max), TA = 25C to 125C |
| Total Output Error | ACS725KMATR-30AU | 1.25 | % | Typ. at IPR(max), TA = 25C to 125C |
| Offset Voltage | All | 6 to 10 | mV | Typ. at IP = 0 A, TA = 25C to 125C (varies by model) |
| Zero Current Output Voltage | Bidirectional Models | VCC 0.5 | V | Nominal |
| Zero Current Output Voltage | ACS725KMATR-30AU | VCC 0.1 | V | Nominal (Unidirectional) |
2404151029_ALLEGRO-ACS725KMATR-30AB-T_C459332.pdf
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