Current sensor ic ALLEGRO ACS37030LLZATR-040B3 featuring dual sensing paths for wide frequency band and robust isolation
Product Overview
The ACS37030/32 is a fully integrated, galvanically isolated current sensor IC designed for high-accuracy current sensing across a wide frequency band (DC to 5 MHz). It employs a dual-path sensing mechanism, combining a Hall-effect element for DC and low-frequency signals with an inductive coil for high-frequency signals, ensuring comprehensive current monitoring. The device offers high isolation (3500 VRMS) and is immune to external magnetic fields due to its differential sensing architecture. Available in two variants ACS37030 with a zero current reference and ACS37032 with an overcurrent fault output it is ideal for applications requiring fast control loops, high-speed switching current monitoring, and robust isolation in demanding environments.
Product Attributes
- Brand: Allegro MicroSystems
- Package Type: 6-lead custom SOIC (LZ)
- Lead Finish: 100% matte tin
- Internal Material: Pb-free
- Certifications: AEC-Q100 Grade 0 qualified, UL 62368-1 (edition 3) compliant (3500 VRMS isolation)
Technical Specifications
| Feature | Specification | Details |
|---|---|---|
| Product Series | ACS37030 / ACS37032 | DC to 5 MHz Bandwidth, Galvanically Isolated, High-Accuracy Current Sensor IC |
| Sensing Method | Hall-effect element and inductive coil | Dual-path for wide frequency band sensing |
| Operating Bandwidth | DC to 5 MHz | -3 dB typical |
| Response Time | 40 ns (typical) | |
| Isolation Voltage | 3500 VRMS | Rated for 60 seconds per UL 62368-1 |
| Basic Working Voltage | 840 VRMS / 1188 VDC | According to UL 62368-1 |
| Reinforced Isolation Voltages | 420 VRMS / 594 VDC | According to UL 62368-1 |
| Differential Sensing | Immune to external magnetic fields | |
| Supply Voltage | 3.3 V (non-ratiometric) | |
| Operating Temperature | -40C to 150C | |
| Internal Conductor Resistance | 0.6 m (typical) | |
| Noise (Input Referred) | 50 mARMS | BW = 5 MHz, TA = 25C |
| VREF Output (ACS37030) | Yes | For differential routing in noisy environments |
| FAULT Output (ACS37032) | Yes | Fast open-drain overcurrent detection |
| Package Dimensions | Custom 6-pin SOIC (LZ) | See Figure 15 for detailed dimensions |
| Model Variants | Current Sensing Range (IPR) | Sensitivity (mV/A) |
| ACS37030LLZATR-020B3 | 20 A | 66 mV/A |
| ACS37030LLZATR-040B3 | 40 A | 33 mV/A |
| ACS37030LLZATR-065B3 | 65 A | 20.3 mV/A |
| ACS37032LLZATR-020B3 | 20 A | 66 mV/A |
| ACS37032LLZATR-040B3 | 40 A | 33 mV/A |
| ACS37032LLZATR-065B3 | 65 A | 20.3 mV/A |
| Sensitivity Error (DC) | 2% (typical) | Over temperature range |
| Offset Voltage Error | 10 mV (maximum) | Over temperature range |
| Power-On Time (tPO) | 2 to 4 ms (typical) | |
| Overcurrent Threshold (ACS37032) | 100% of IPR (typical) | |
| Overcurrent Hysteresis (ACS37032) | 1.2 A to 3.9 A (depending on IPR) | |
| Overcurrent Response Time (tOC_RESP) | 50 ns (typical) |
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.