Product Overview
The Allegro ACS72981 family of current sensor ICs offers economical and precise solutions for bidirectional AC or DC current sensing. With a 250 kHz bandwidth and a response time of less than 2 s, these sensors are ideal for applications such as motor control, load detection and management, power supply and DC-to-DC converter control, and inverter control. They are particularly suited for safety-critical applications requiring overcurrent fault detection. The ACS72981xLR utilizes a precision, low-offset linear Hall circuit with an integrated 200 copper conduction path, minimizing power loss and maximizing power density. Proprietary digital temperature compensation ensures improved accuracy over temperature and lifetime. The device employs differential sensing techniques to virtually eliminate output disturbance from common-mode magnetic fields.
Product Attributes
- Brand: Allegro
- Qualification: AEC-Q100 automotive qualification
- Material: Lead (Pb) free, 100% matte tin plating, oxygen-free copper leadframe
- Package: 7-pin PSOF package (suffix LR)
Technical Specifications
| Model/Variant | Primary Sampled Current (IP) | Sensitivity (Sens Typ.) | Nominal Supply Voltage (VCC) | Operating Temperature Range | Bandwidth | Response Time | Primary Conductor Resistance |
|---|---|---|---|---|---|---|---|
| ACS72981LLRATR-050B3 | 50 A | 26.4 mV/A | 3.3 V | -40 to 150 C | 250 kHz | < 2 s | 200 |
| ACS72981LLRATR-050B5 | 50 A | 40 mV/A | 5 V | -40 to 150 C | |||
| ACS72981LLRATR-050U3 | 50 A | 52.8 mV/A | 3.3 V | -40 to 150 C | 250 kHz | < 2 s | 200 |
| ACS72981LLRATR-050U5 | 50 A | 80 mV/A | 5 V | -40 to 150 C | |||
| ACS72981LLRATR-100B3 | 100 A | 13.2 mV/A | 3.3 V | -40 to 150 C | 250 kHz | < 2 s | 200 |
| ACS72981LLRATR-100B5 | 100 A | 20 mV/A | 5 V | -40 to 150 C | |||
| ACS72981LLRATR-100U3 | 100 A | 26.4 mV/A | 3.3 V | -40 to 150 C | 250 kHz | < 2 s | 200 |
| ACS72981LLRATR-100U5 | 100 A | 40 mV/A | 5 V | -40 to 150 C | |||
| ACS72981KLRATR-150B3 | 150 A | 8.8 mV/A | 3.3 V | -40 to 125 C | 250 kHz | < 2 s | 200 |
| ACS72981KLRATR-150B5 | 150 A | 13.33 mV/A | 5 V | -40 to 125 C | |||
| ACS72981KLRATR-150U3 | 150 A | 17.6 mV/A | 3.3 V | -40 to 125 C | 250 kHz | < 2 s | 200 |
| ACS72981KLRATR-150U5 | 150 A | 26.66 mV/A | 5 V | -40 to 125 C | |||
| ACS72981ELRATR-200B3 | 200 A | 6.6 mV/A | 3.3 V | -40 to 85 C | 250 kHz | < 2 s | 200 |
| ACS72981ELRATR-200B5 | 200 A | 10 mV/A | 5 V | -40 to 85 C | |||
| ACS72981ELRATR-200U3 | 200 A | 13.2 mV/A | 3.3 V | -40 to 85 C | 250 kHz | < 2 s | 200 |
| ACS72981ELRATR-200U5 | 200 A | 20 mV/A | 5 V | -40 to 85 C | |||
| Supply Voltage (VCC) | 3 V to 3.6 V (3.3V variant) or 4.5 V to 5.5 V (5V variant) | - | - | - | - | - | |
| Supply Current (ICC) | 14 mA (typical) | - | - | - | - | - | |
| Power-On Delay (tPO) | 70 s (typical) | - | - | - | - | - | |
| Overcurrent Capability (IPOC) | Up to 285 A (1 second on time, 60 seconds off time, TA = 25C) | - | - | - | - | - | |
| Absolute Maximum Supply Voltage (VCC) | 6.5 V | - | - | - | - | - | |
| Maximum Junction Temperature (TJ(max)) | 165 C | - | - | - | - | - | |
2304140030_ALLEGRO-ACS72981KLRATR-150B3_C1864155.pdf
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