High accuracy current sensor ALLEGRO ACS37003KMCATR-085B5 with dissipation and magnetic coupling isolation
Product Overview
The ACS37003 is a fully integrated current sensor IC designed for accurate current sensing in a custom SOICW16 package. It features a very low 265 primary conductor resistance, minimizing power dissipation and making it ideal for low-power applications. The sensor is factory-trimmed for high accuracy across its operating range, eliminating the need for customer programming or calibration. Its internal construction provides high isolation through magnetic coupling to a monolithic Hall sensor IC, with differential sensing to reject common-mode magnetic fields. The device offers 5 kVRMS isolation, industry-leading basic working voltage of 1140 VRMS, and reinforced working voltage of 572 VRMS. The ACS37003KMC is provided in a surface mount SOICW16 package with enhanced lead-frame thickness for reduced resistance and a body size that ensures over 8.2 mm of creepage and clearance. It supports a 400 kHz bandwidth and a typical response time of 1.1 s, making it suitable for fast control loops and high-speed current monitoring. The device is UL-certified to UL 62368-1 and is RoHS compliant.
Product Attributes
- Brand: Allegro MicroSystems
- Certifications: UL-certified to 62368-1
- Compliance: RoHS compliant
- Package Material: 100% matte tin plated leadframe
Technical Specifications
| Characteristic | Model/Condition | Value | Unit |
|---|---|---|---|
| Product Name | ACS37003KMC | ||
| Current Sensing Range | ACS37003KMCATR-120B3 | 120 | A |
| ACS37003KMCATR-050B5 | 50 | A | |
| ACS37003KMCATR-085B5 | 85 | A | |
| ACS37003KMCATR-180B5 | 180 | A | |
| Sensitivity | ACS37003KMCATR-120B3 | 12 | mV/A |
| ACS37003KMCATR-050B5 | 40 | mV/A | |
| ACS37003KMCATR-085B5 | 25 | mV/A | |
| ACS37003KMCATR-180B5 | 12 | mV/A | |
| Supply Voltage (VCC) | ACS37003KMCATR-120B3 | 3.3 | V |
| ACS37003KMCATR-050B5, -085B5, -180B5 | 5 | V | |
| Operating Temperature | K | 40 to 125 | C |
| Package | 16-pin SOICW | ||
| Bandwidth | 400 | kHz | |
| Response Time | 1.1 | s | |
| Primary Conductor Resistance | 265 | ||
| Isolation Test Voltage | 5000 | VRMS | |
| Basic Isolation Voltage | 1144 | VRMS / 1618 VDC | |
| Reinforced Isolation Voltage | 572 | VRMS / 809 VDC | |
| Creepage/Clearance | > 8.2 | mm | |
| Continuous Operating Current (Max) | at 85C | 70 | ARMS |
| Supply Voltage (VCC) | Operating Range | 4.5 - 5.5 (for 5V) / 3.15 - 3.6 (for 3.3V) | V |
| Supply Current (ICC) | VCC = 5V, no load | 15 - 18 | mA |
| VCC = 3.3V, no load | 12 - 15 | mA | |
| Power-On Time (tPOD) | 100 | s | |
| Overvoltage Detection (OVD) Enable Delay | 64 | s | |
| Total Error (ETOT) | ACS37003KMCATR-050B5, IP=50A, TA=25C | -0.7 to 0.7 | % |
| ACS37003KMCATR-050B5, IP=50A, TA=-40C to 125C | -1.3 to 1.3 | % |
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