Precision current measurement sensor Allegro ACS37002LMCATR066B5 with differential sensing and loss
Product Overview
The ACS37002LMC is a fully integrated, high-accuracy Hall-effect current sensor designed for precise current measurements in various applications. It features a factory-trimmed monolithic Hall sensor IC within an SOICW-16 package, offering high isolation and eliminating the need for customer programming. The device utilizes differential sensing to reject common-mode magnetic fields and boasts a low internal primary conductor resistance of 0.27 m for improved power efficiency. With a 400 kHz bandwidth and a 1.1 s typical response time, it is suitable for applications requiring fast control loops or high-speed current monitoring. The ACS37002LMC offers externally configurable functional features, including four adjustable gain levels via two logic pins for flexible current range selection. It also provides a fast overcurrent fault output with a pin-adjustable threshold for system protection. Designed for robustness and reliability, it operates across a wide temperature range and is AEC-Q100 qualified.
Product Attributes
- Brand: Allegro MicroSystems
- Package Type: SOICW-16 (MC)
- Certifications: UL60950-1, UL 62368-1, AEC-Q100 Qualified
- Compliance: RoHS compliant, lead (Pb) free with 100% matte-tin-plated leadframes
Technical Specifications
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|---|
| Common Electrical Characteristics | ||||||
| Supply Voltage | VCC | 5 V devices | 4.5 | 5 | 5.5 | V |
| Supply Voltage | VCC | 3.3 V devices | 3.15 | 3.3 | 3.6 | V |
| Supply Current | ICC | VCC = 5 V, no load | - | 13 | 18 | mA |
| Supply Current | ICC | VCC = 3.3 V, no load | - | 12 | 15 | mA |
| Primary Conductor Resistance | RIP | TA = 25C | - | 0.27 | - | m |
| Power-On Reset Voltage (Rising) | VPOR(H) | VCC rising | 2.6 | 2.9 | 3.1 | V |
| Power-On Time | tPOD | VCC rising VPOR(H) | 100 | - | - | s |
| Output Signal Characteristics (VIOUT) | ||||||
| Internal Bandwidth | BW | Small signal 3 dB, CL = 5.7 nF | - | 400 | - | kHz |
| Response Time | tRESPONSE | TA = 25C, CL = 5.7 nF | - | 1.1 | 2.5 | s |
| Sensitivity Error | ESENS | IP = IPR(max) | -1.5 | 1.1 | 1.5 | % |
| Reference Output Characteristics (VREF) | ||||||
| Zero Current Reference Voltage | VREF | Bidirectional; VCC = 5 V | 2.49 | 2.5 | 2.51 | V |
| Zero Current Reference Voltage | VREF | Bidirectional; VCC = 3.3 V | 1.64 | 1.65 | 1.66 | V |
| Overcurrent Fault Characteristics (OCF) | ||||||
| OCF Response Time | tOCF | Time from IOCF-OP until fault asserts | - | 1 | 1.5 | s |
| OCF Mask Time | tOCF-MASK | 0 | 0 | 3 | s | |
| OCF Hold Time | tOCF-HOLD | 0 | 0 | 5 | ms | |
| Selection Guide | ||||||
| Part Number | Current Sensing Range, IPR (A) | Sensitivity [1] (mV/A) | Nominal VCC (V) | Optimized Temp. Range TA (C) | Packing | |
| ACS37002LMCATR-050B5 | 33.3, 40, 50, 66.7 | 60, 50, 40, 30 | 5 | 40 to 150 | 1000 pieces per 13-inch reel | |
| ACS37002LMCATR-066B5 | 66.7, 80 | 30, 25, 20, 15 | 5 | 40 to 150 | 1000 pieces per 13-inch reel | |
| ACS37002LMCATR-090B5 | 90, 108, 135, 180 | 22.2, 18.5, 14.8, 11.1 | 5 | 40 to 150 | 1000 pieces per 13-inch reel | |
| ACS37002LMCATR-050U5 | 33.3, 40, 50, 66.7 | 120, 100, 80, 60 | 5 | 40 to 150 | 1000 pieces per 13-inch reel | |
| ACS37002LMCATR-050B3 | 33.3, 40, 50, 66.7 | 39.6, 33, 26.4, 19.8 | 3.3 | 40 to 150 | 1000 pieces per 13-inch reel | |
| ACS37002LMCATR-066B3 | 66.7, 80 | 19.8, 16.5, 13.2, 9.9 | 3.3 | 40 to 150 | 1000 pieces per 13-inch reel | |
| ACS37002LMCATR-090B3 | 90, 108, 135, 180 | 14.7, 12.2, 9.8, 7.3 | 3.3 | 40 to 150 | 1000 pieces per 13-inch reel | |
| Isolation Characteristics | ||||||
| Withstand Voltage | VISO | Agency rated for 60 seconds | - | 5000 | - | VRMS |
| Working Voltage for Basic Isolation | VWVBI | UL 62368-1 | 1144 | - | VRMS | |
| Working Voltage for Reinforced Isolation | VWVRI | UL 62368-1 | 572 | - | VRMS | |
| Distance Through Insulation | DTI | 70 | - | - | m | |
| Thermal Characteristics | ||||||
| Package Thermal Resistance (Junction to Ambient) | RJA | Mounted on evaluation board | - | 19 | - | C/W |
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