Product Overview
The ACS37003 is a fully integrated, high-accuracy current sensor IC designed for precise current measurement in various applications. It features a low internal primary conductor resistance of 265 , enabling low power dissipation and high efficiency. The sensor is factory-trimmed, eliminating the need for customer programming or calibration. Its internal construction provides high isolation, magnetically coupling the current-generated field to a monolithic Hall sensor IC. Differential sensing with two Hall plates rejects common-mode magnetic fields. The ACS37003 offers industry-leading isolation ratings, including 5 kVRMS isolation and a basic working voltage of 1140 VRMS, making it suitable for high-voltage applications. With a wide operating temperature range of 40C to 125C and a high operating bandwidth of 400 kHz, it is ideal for fast control loops and high-speed current monitoring.
Product Attributes
- Brand: Allegro MicroSystems
- Package: Custom SOICW16 surface mount package
- Leadframe Plating: 100% matte tin
- Compliance: RoHS compliant (Pb-free internally)
- Certifications: UL-certified to UL 62368-1
Technical Specifications
| Characteristic | Model/Value | Details |
|---|---|---|
| Product Name | ACS37003KMC | 400 kHz Current Sensor IC |
| Primary Conductor Resistance | 265 | (Typical) |
| Operating Bandwidth | 400 kHz | (-3dB) |
| Typical Response Time | 1.1 s | (CL = 5.7 nF) |
| Isolation Test Voltage | 5 kVRMS | (Rated) |
| Basic Isolation Voltage | 1144 VRMS / 1618 VDC | (Agency rated) |
| Reinforced Isolation Voltage | 572 VRMS / 809 VDC | (Agency rated) |
| Creepage & Clearance | > 8.2 mm | (Package body) |
| Operating Temperature Range | 40C to 125C | (TA) |
| Maximum Continuous Current | 70 ARMS | (at 85C) |
| Supply Voltage (VCC) | 3.3 V or 5 V | (See Selection Guide for specific models) |
| Selection Guide Models | ACS37003KMCATR-120B3 | 120 A, 12 mV/A, 3.3 V |
| ACS37003KMCATR-050B5 | 50 A, 40 mV/A, 5 V | |
| ACS37003KMCATR-085B5 | 85 A, 25 mV/A, 5 V | |
| ACS37003KMCATR-180B5 | 180 A, 12 mV/A, 5 V | |
| Package Dimensions | 16-Pin SOICW | (See Package Outline Drawing) |
| Power-On Reset Threshold | 2.6 V to 3.1 V (VPOR(H)) | (Typical) |
| Overvoltage Detection Threshold | 6.1 V to 6.8 V (VOVD(H)) | (Typical for 5V VCC) |
| Power-On Delay (tPOD) | 100 s | (Typical) |
| OVD Enable Delay (tdOVD(EN)) | 64 s | (Typical) |
| Output Saturation Voltage (VSAT) | VCC - 0.25 V (High), 0.15 V (Low) | (Typical) |
| Total Error (ETOT) | As low as 0.7% | (See Performance Characteristics tables for details) |
| Sensitivity Error (ESENS) | As low as 0.7% | (See Performance Characteristics tables for details) |
| Offset Error (VOE) | 5 mV | (Typical over temperature) |
| Reference Error (VRE) | 10 mV | (Typical over temperature) |
| QVO Error (VQE) | 10 mV | (Typical over temperature) |
2506301205_ALLEGRO-ACS37003KMCATR-050B5_C3684151.pdf
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