Product Overview
The ACS37003 is a fully integrated current sensor IC designed for precise current measurement in various applications. It features a low-resistance integrated conductor (265 ) for minimal power dissipation and high operating bandwidth (400 kHz) for fast control loops. The sensor offers high accuracy, factory-trimmed for reliability without customer programming. Its internal construction provides high isolation (5 kVRMS) between the primary current path and the signal leads, making it suitable for high-voltage applications with industry-leading basic (1140 VRMS) and reinforced (572 VRMS) working voltages. The device is UL-certified to 62368-1 and is RoHS compliant. It is ideal for applications requiring fast, accurate current sensing with robust isolation.
Product Attributes
- Brand: Allegro MicroSystems
- Package: Custom SOICW16 surface mount package
- Leadframe Plating: 100% matte tin
- Compliance: RoHS compliant, Pb-free internal construction
- Certifications: UL-certified to 62368-1
Technical Specifications
| Characteristic | Model/Value | Details |
|---|---|---|
| Product Name | ACS37003KMC | 400 kHz Current Sensor IC |
| Current Sensing Range (IPR) | 120 A | For ACS37003KMCATR-120B3 |
| Current Sensing Range (IPR) | 50 A | For ACS37003KMCATR-050B5 |
| Current Sensing Range (IPR) | 85 A | For ACS37003KMCATR-085B5 |
| Current Sensing Range (IPR) | 180 A | For ACS37003KMCATR-180B5 |
| Sensitivity (Sens) | 12 mV/A | For 120 A range |
| Sensitivity (Sens) | 40 mV/A | For 50 A range |
| Sensitivity (Sens) | 25 mV/A | For 85 A range |
| Sensitivity (Sens) | 12 mV/A | For 180 A range |
| Supply Voltage (VCC) | 3.3 V | For ACS37003KMCATR-120B3 |
| Supply Voltage (VCC) | 5 V | For ACS37003KMCATR-050B5, ACS37003KMCATR-085B5, ACS37003KMCATR-180B5 |
| Operating Temperature Range (TA) | 40C to 125C | K temperature range |
| Internal 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 |
| Continuous Operating Current (Max) | 70 ARMS | At 85C |
| Package Dimensions | SOICW16 | Custom, 16-pin surface mount |
| Creepage and Clearance | > 8.2 mm | Package body sizing |
| Supply Current (ICC) | 15-18 mA | VCC = 5 V, no load |
| Supply Current (ICC) | 12-15 mA | VCC = 3.3 V, no load |
| Power-On Time (tPOD) | 100 s | Typical |
| Overvoltage Detection (OVD) Delay | 64 s | Enable time typical |
| Total Error (ETOT) | As low as 0.7% | Over temperature and current range (model dependent) |
| Sensitivity Error (ESENS) | As low as 0.7% | Over temperature and current range (model dependent) |
| Offset Error (VOE) | 5 mV | Max over temperature |
| Zero Current Output Voltage (VIOUT(Q)) | 1.65 V | Bidirectional, VCC = 3.3 V |
| Zero Current Output Voltage (VIOUT(Q)) | 2.5 V | Bidirectional, VCC = 5 V |
2504101957_ALLEGRO-ACS37003KMCATR-050B9_C3684567.pdf
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