400 kHz, High Accuracy Current Sensor with Pin-Selectable Gains and Adjustable Overcurrent Fast Fault in SOICW-16 Package
Product Overview
The ACS37002LMC is a fully integrated Hall-effect current sensor designed for high-accuracy current measurements in a compact SOICW-16 package. It offers factory-trimmed precision without the need for customer programming, ensuring reliable performance across its operating range. The sensor utilizes differential Hall plates to reject common-mode magnetic fields, providing excellent immunity. Its unique package construction offers high isolation, crucial for safety and reliability. Key features include externally configurable gain settings via two logic pins, enabling four distinct sensitivities and current ranges. A fast overcurrent fault output provides system protection with a pin-adjustable threshold, proportional to the selected current range. The integrated reference pin facilitates differential measurements and sets the overcurrent fault threshold. With a low internal conductor resistance of 0.27 m, it minimizes power dissipation and heat. The device boasts a high operating bandwidth of 400 kHz and a fast response time of 1.1 s, making it suitable for applications with fast control loops or high-speed current monitoring. It is RoHS compliant and lead-free.
Product Attributes
- Brand: Allegro MicroSystems
- Package Type: SOICW-16 (MC)
- Certifications: UL60950-1 (ed. 2), UL 62368 (ed. 1), AEC-Q100 qualified
- Compliance: RoHS compliant, lead (Pb) free
- Lead Finish: 100% matte-tin-plated leadframes
- Isolation Voltage: 5 kVRMS
Technical Specifications
| Part Number | Current Sensing Range (IPR) | Sensitivity (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, 100, 133.3 | 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 | 80, 100, 120, 60 | 5 | 40 to 150 | 1000 pieces per 13-inch reel |
| ACS37002LMCATR-050B3 | 33.3, 40, 50, 66.7 | 26.4, 33, 39.6, 19.8 | 3.3 | 40 to 150 | 1000 pieces per 13-inch reel |
| ACS37002LMCATR-066B3 | 66.7, 80, 100, 133.3 | 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 |
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 5 V devices only | 4.5 | 5 | 5.5 | V |
| Supply Voltage | VCC | 3.3 V devices only | 3.15 | 3.3 | 3.6 | V |
| Supply Current | ICC | No load on VIOUT or VREF; VCC = 5 V | 13 | 18 | mA | |
| Supply Current | ICC | No load on VIOUT or VREF; VCC = 3.3 V | 12 | 15 | mA | |
| Primary Conductor Resistance | RIP | TA = 25C | 0.27 | m | ||
| Bandwidth | BW | Small signal 3 dB, CL = 5.7 nF | 400 | kHz | ||
| Response Time | tRESPONSE | TA = 25C, CL = 5.7 nF, 90% input to 90% of 1 V output swing | 1.1 | 2.5 | s | |
| Overcurrent Fault Response Time | tOCF | Time from IOCF-OP to fault assertion | 1 | 1.5 | s | |
| Overcurrent Fault Reaction Time | tOCF-R | Time from current rising above IOCF-OP until fault releases | 0.75 | 1 | s | |
| Operating Ambient Temperature | TA | 40 | 150 | C | ||
| Dielectric Strength Test Voltage | VISO | Agency type-tested for 60 seconds | 5000 | VRMS | ||
| Working Voltage for Basic Isolation | VWVBI | According to UL 60950-1/62368-1 | 1144 | VRMS / VDC | ||
| Working Voltage for Reinforced Isolation | VWVRI | According to UL 60950-1/62368-1 | 572 | VRMS / VDC |
| Gain_Sel_1 | Gain_Sel_0 | Sensitivity (mV/A) | Max IP (A) | Type |
|---|---|---|---|---|
| 0 | 0 | 40 | 50 | Bidirectional |
| 0 | 1 | 50 | 40 | Bidirectional |
| 1 | 0 | 60 | 33.3 | Bidirectional |
| 1 | 1 | 30 | 66.7 | Bidirectional |
| Gain_Sel_1 | Gain_Sel_0 | Sensitivity (mV/A) | Max IP (A) | Type |
|---|---|---|---|---|
| 0 | 0 | 30 | 66.7 | Bidirectional |
| 0 | 1 | 25 | 80 | Bidirectional |
| 1 | 0 | 20 | 100 | Bidirectional |
| 1 | 1 | 15 | 133.3 | Bidirectional |
| Gain_Sel_1 | Gain_Sel_0 | Sensitivity (mV/A) | Max IP (A) | Type |
|---|---|---|---|---|
| 0 | 0 | 22.2 | 90 | Bidirectional |
| 0 | 1 | 18.5 | 108 | Bidirectional |
| 1 | 0 | 14.8 | 135 | Bidirectional |
| 1 | 1 | 11.1 | 180 | Bidirectional |
| Gain_Sel_1 | Gain_Sel_0 | Sensitivity (mV/A) | Max IP (A) | Type |
|---|---|---|---|---|
| 0 | 0 | 80 | 50 | Unidirectional |
| 0 | 1 | 100 | 40 | Unidirectional |
| 1 | 0 | 120 | 33.3 | Unidirectional |
| 1 | 1 | 60 | 66.7 | Unidirectional |
| Gain_Sel_1 | Gain_Sel_0 | Sensitivity (mV/A) | Max IP (A) | Type |
|---|---|---|---|---|
| 0 | 0 | 26.4 | 50 | Bidirectional |
| 0 | 1 | 33 | 40 | Bidirectional |
| 1 | 0 | 39.6 | 33.3 | Bidirectional |
| 1 | 1 | 19.8 | 66.7 | Bidirectional |
| Gain_Sel_1 | Gain_Sel_0 | Sensitivity (mV/A) | Max IP (A) | Type |
|---|---|---|---|---|
| 0 | 0 | 19.8 | 66.7 | Bidirectional |
| 0 | 1 | 16.5 | 80 | Bidirectional |
| 1 | 0 | 13.2 | 100 | Bidirectional |
| 1 | 1 | 9.9 | 133.3 | Bidirectional |
| Gain_Sel_1 | Gain_Sel_0 | Sensitivity (mV/A) | Max IP (A) | Type |
|---|---|---|---|---|
| 0 | 0 | 14.7 | 90 | Bidirectional |
| 0 | 1 | 12.2 | 108 | Bidirectional |
| 1 | 0 | 9.8 | 135 | Bidirectional |
| 1 | 1 | 7.3 | 180 | Bidirectional |
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|---|
| 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 |
| Zero Current Reference Voltage | VREF | Unidirectional; VCC = 5 V | 0.49 | 0.5 | 0.51 | V |
| OCF On Voltage | VFAULT-ON | RPU = 4.7 k, under fault condition | 0.07 | 0.4 | V | |
| VOC Operating Voltage Range | VVOC | VCC = 5 V | 0.5 | 2 | V | |
| VOC Operating Voltage Range | VVOC | VCC = 3.3 V | 0.33 | 1.32 | V | |
| OCF Hysteresis | IOCF(HYS) | VCC = 5 V | 6 | %FS | ||
| OCF Hysteresis | IOCF(HYS) | VCC = 3.3 V | 9 | %FS |
2312120015_ALLEGRO-ACS37002LMCATR-090B5_C7455086.pdf
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