100 Amp Bidirectional Linear Hall Effect Current Sensor ALLEGRO ACS780LLRTR-100U-T with Programmed Sensitivity
Product Overview
The Allegro ACS780xLR is a fully integrated, automotive-grade linear Hall-effect current sensor IC designed for bidirectional AC and DC current sensing up to 100 A. It features a core-less, low-profile package with a small footprint and offers high-precision measurement with an ultra-low 200 internal conductor resistance for minimal power loss. The device incorporates common-mode field rejection and proprietary integrated shield technology for enhanced immunity to interfering magnetic fields and high dV/dt signals, ensuring stable performance in high-side, high-voltage applications. Its factory-programmed sensitivity and quiescent output voltage, along with chopper-stabilized signal path and digital temperature compensation, contribute to excellent accuracy and stability across its operating temperature range. The ACS780xLR is ideal for applications requiring precise current monitoring in automotive and industrial environments.
Product Attributes
- Brand: Allegro
- Technology: Linear Hall-Effect
- Package: 7-pin PSOF (suffix LR)
- Automotive Qualification: AEC-Q100
- Lead Free: Yes
- Material: Lead frame made of oxygen-free copper; leads plated with 100% matte tin.
Technical Specifications
| Feature/Model | Description | Value | Unit |
|---|---|---|---|
| Sensed Current Range & Sensitivity | ACS780LLRTR-050B-T (Bidirectional) | 50 | A |
| ACS780LLRTR-050U-T (Unidirectional) | 0 to 50 | A | |
| ACS780LLRTR-100B-T (Bidirectional) | 100 | A | |
| ACS780LLRTR-100U-T (Unidirectional) | 0 to 100 | A | |
| ACS780KLRTR-150B-T (Bidirectional) | 150 (transient), 100 (continuous) | A | |
| ACS780KLRTR-150U-T (Unidirectional) | 0 to 150 (transient), 0 to 100 (continuous) | A | |
| Continuous Current Rating | Up to 100 A | A | |
| Internal Conductor Resistance | Typical | 200 | |
| Supply Voltage | VCC | 4.5 to 5.5 | V |
| Bandwidth | Typical | 120 | kHz |
| Output Rise Time | Typical (3.6 s for step input current) | 3.6 | s |
| Operating Temperature Range | Range K | -40 to 150 | C |
| Range L | -40 to 125 | C | |
| Quiescent Output Voltage (Bidirectional) | IP = 0 A, TA = 25C | VCC/2 | V |
| Quiescent Output Voltage (Unidirectional) | IP = 0 A, TA = 25C | 0.1 VCC | V |
| Isolation Voltage | Up to 100 V peak on primary conductor | 100 | V |
| Overcurrent Capability (IPOC) | TA = 25C, 1 s on time | 285 | A |
| Package Thermal Resistance (RJA) | Mounted on evaluation board | 18 | C/W |
| Maximum Junction Temperature | TJ(max) | 165 | C |
| Storage Temperature | Tstg | -65 to 165 | C |
| Sensitivity (X050B) | Typical | 40 | mV/A |
| Sensitivity (X100B) | Typical | 20 | mV/A |
| Sensitivity (X150B) | Typical | 13.33 | mV/A |
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