Product Overview
The Allegro ACS37041/2 is an AEC-Q100 qualified, Hall-effect current sensor designed for cost-optimized applications, serving as a direct replacement for shunt resistors. This integrated, self-contained solution offers galvanic isolation and features a low 1.6 m conductor resistance for minimal power dissipation. It provides a voltage output linearly proportional to the primary current, capable of bidirectional sensing up to 30 A. The sensor is available in 5 V and 3.3 V variants and operates within a wide temperature range of 40C to 125C. Its small, 5-pin SOT23-W package makes it suitable for space-constrained designs in industrial motor drivers, clean energy systems (string and microinverters), and personal mobility devices.
Product Attributes
- Brand: Allegro MicroSystems
- Qualification: AEC-Q100 Grade 1, Automotive Qualified
- Material: Lead (Pb) free, plated with 100% matte tin
- Package: 5-Pin SOT23-W (suffix LH)
- Certifications: UL certified (ACS37042 basic working voltage pending)
Technical Specifications
| Characteristic | Model | Value | Unit | Notes |
|---|---|---|---|---|
| Current Sensing Range | ACS37041/2 | 10, 30 | A | Bidirectional |
| Conductor Resistance | ACS37041/2 | 1.6 | m | Low ohmic loss |
| Functional Working Voltage | ACS37041 | 100 | VRMS | Functional isolation |
| Basic Working Voltage | ACS37042 | 285 | VRMS | Basic isolation (pending) |
| Supply Voltage Options | ACS37041/2 | 3.3, 5 | V | Variants available |
| Sensitivity Error (Total) | ACS37041/2 | < 3.5% | % | Over temperature |
| Operating Temperature Range | ACS37041/2 | -40 to 125 | C | Ambient |
| Analog Output Bandwidth | ACS37041/2 | 150 | kHz | Small signal -3 dB |
| Sensitivity (Typical) | ACS37041KLHBLT-010B3/B3 | 132 | mV/A | VDD=3.3V, 10A range |
| Sensitivity (Typical) | ACS37041KLHBLT-030B3/B3 | 44 | mV/A | VDD=3.3V, 30A range |
| Sensitivity (Typical) | ACS37041KLHBLT-010B5/B5 | 200 | mV/A | VDD=5V, 10A range |
| Sensitivity (Typical) | ACS37041KLHBLT-030B5/B5 | 66.7 | mV/A | VDD=5V, 30A range |
| Quiescent Voltage Output (VQVO) | ACS37041/2 (3.3V VDD) | 1.65 | V | IP = 0 A |
| Quiescent Voltage Output (VQVO) | ACS37041/2 (5V VDD) | 2.5 | V | IP = 0 A |
| Power-On Time (tPO) | ACS37041/2 | 84 | s | Typical at 25C |
| Response Time (tRESP) | ACS37041/2 | 3 to 5 | s | Typical |
| Propagation Delay (tPD) | ACS37041/2 | 1.8 to 3 | s | Typical |
| Package Thermal Resistance (RJA) | ACS37041/2 | 32 | C/W | Mounted on ACSEVB-LH5 |
2511191439_ALLEGRO-ACS37041KLHBLT-010B3_C42949339.pdf
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