The Allegro ACS780xLR is a fully integrated, automotive-grade linear Hall-effect current sensor IC designed for precise bidirectional AC and DC current sensing up to 100 A. Housed in a compact, low-profile, core-less package, this sensor IC offers a small footprint and ultra-low power loss due to its 200 internal conductor resistance. It features advanced Hall sensor technology with common-mode field rejection for optimal performance in the presence of interfering magnetic fields. The device converts primary current flowing through its integrated copper conduction path into a proportional analog voltage output (VOUT). Accuracy is enhanced through factory programming of sensitivity and quiescent output voltage, along with chopper-stabilized signal paths and digital temperature compensation. Allegro's proprietary integrated shield technology provides high-level immunity to current conductor dV/dt and stray electric fields, ensuring low-output voltage ripple and minimal offset drift in high-side, high-voltage applications. The ACS780xLR is ideal for applications requiring accurate current monitoring in automotive and industrial environments.
| Model/Parameter | Description | Value | Unit |
| General Features |
| Continuous Current Rating | Maximum | 100 | A |
| Internal Conductor Resistance | Typical | 200 | |
| Supply Voltage | Operating Range | 4.5 to 5.5 | V |
| Bandwidth | Typical | 120 | kHz |
| Output Rise Time | Typical | 3.6 | s |
| Isolation Voltage | Peak | 100 | V |
| Selection Guide |
| ACS780LLRTR-050B-T | Sensed Current (Bidirectional) | 50 | A |
| Sensitivity (Typical) | 40 | mV/A |
| ACS780LLRTR-050U-T | Sensed Current (Unidirectional) | 0 to 50 | A |
| Sensitivity (Typical) | 60 | mV/A |
| ACS780LLRTR-100B-T | Sensed Current (Bidirectional) | 100 | A |
| Sensitivity (Typical) | 20 | mV/A |
| ACS780LLRTR-100U-T | Sensed Current (Unidirectional) | 0 to 100 | A |
| Sensitivity (Typical) | 40 | mV/A |
| ACS780KLRTR-150B-T | Sensed Current (Bidirectional) | 150 (transient), 100 (continuous) | A |
| Sensitivity (Typical) | 13.33 | mV/A |
| ACS780KLRTR-150U-T | Sensed Current (Unidirectional) | 0 to 150 (transient), 0 to 100 (continuous) | A |
| Sensitivity (Typical) | 26.66 | mV/A |
| Performance Characteristics (Typical for X050B) |
| Primary Sampled Current (IP) | Range | -50 to 50 | A |
| Sensitivity (SensTA) | @ 25C | 40 | mV/A |
| Noise (VNOISEPP) | Peak-to-peak | 36 | mV |
| Nonlinearity (ELIN) | Range | -1 to 1 | % |
| Electrical Offset Voltage (VOE(TA)) | @ 25C | 3 | mV |
| Total Output Error (ETOT(HT)) | @ 25C to 150C | 0.8 | % |
| Total Output Error (ETOT(LT)) | @ -40C to 25C | 1.5 | % |
| Performance Characteristics (Typical for X050U) |
| Primary Sampled Current (IP) | Range | 0 to 50 | A |
| Sensitivity (SensTA) | @ 25C | 60 | mV/A |
| Noise (VNOISEPP) | Peak-to-peak | 54 | mV |
| Nonlinearity (ELIN) | Range | -1 to 1 | % |
| Electrical Offset Voltage (VOE(TA)) | @ 25C | 3 | mV |
| Total Output Error (ETOT(HT)) | @ 25C to 150C | 0.8 | % |
| Total Output Error (ETOT(LT)) | @ -40C to 25C | 1.5 | % |
| Performance Characteristics (Typical for X100B) |
| Primary Sampled Current (IP) | Range | -100 to 100 | A |
| Sensitivity (SensTA) | @ 25C | 20 | mV/A |
| Noise (VNOISEPP) | Peak-to-peak | 18 | mV |
| Nonlinearity (ELIN) | Range | -1 to 1 | % |
| Electrical Offset Voltage (VOE(TA)) | @ 25C | 3 | mV |
| Total Output Error (ETOT(HT)) | @ 25C to 150C | 0.8 | % |
| Total Output Error (ETOT(LT)) | @ -40C to 25C | 1.5 | % |
| Performance Characteristics (Typical for X100U) |
| Primary Sampled Current (IP) | Range | 0 to 100 | A |
| Sensitivity (SensTA) | @ 25C | 40 | mV/A |
| Noise (VNOISEPP) | Peak-to-peak | 36 | mV |
| Nonlinearity (ELIN) | Range | -1 to 1 | % |
| Electrical Offset Voltage (VOE(TA)) | @ 25C | 3 | mV |
| Total Output Error (ETOT(HT)) | @ 25C to 150C | 0.8 | % |
| Total Output Error (ETOT(LT)) | @ -40C to 25C | 1.5 | % |
| Performance Characteristics (Typical for X150B) |
| Primary Sampled Current (IP) | Transient / Continuous | -150 to 150 / -100 to 100 | A |
| Sensitivity (SensTA) | @ 25C | 13.33 | mV/A |
| Noise (VNOISEPP) | Peak-to-peak | 12 | mV |
| Nonlinearity (ELIN) | Range | -1 to 1 | % |
| Electrical Offset Voltage (VOE(TA)) | @ 25C | 3 | mV |
| Total Output Error (ETOT(HT)) | @ 25C to 125C | 0.8 | % |
| Total Output Error (ETOT(LT)) | @ -40C to 25C | 1.5 | % |
| Performance Characteristics (Typical for X150U) |
| Primary Sampled Current (IP) | Transient / Continuous | 0 to 150 / 0 to 100 | A |
| Sensitivity (SensTA) | @ 25C | 26.66 | mV/A |
| Noise (VNOISEPP) | Peak-to-peak | 24 | mV |
| Nonlinearity (ELIN) | Range | -1 to 1 | % |
| Electrical Offset Voltage (VOE(TA)) | @ 25C | 3 | mV |
| Total Output Error (ETOT(HT)) | @ 25C to 125C | 0.8 | % |
| Total Output Error (ETOT(LT)) | @ -40C to 25C | 1.5 | % |
| Operating Temperature Range |
| TOP Range K | Nominal | -40 to 125 | C |
| TOP Range L | Nominal | -40 to 150 | C |
| Pinout |
| Pin 1 | VCC | Device power supply terminal | - |
| Pin 2 | GND | Signal ground terminal | - |
| Pin 3 | VOUT | Analog output signal | - |
| Pin 4 | NC | No connection, connect to GND for optimal ESD performance | - |
| Pin 5 | IP+ | Terminal for current being sampled | - |
| Pin 6 | IP | Terminal for current being sampled | - |
| Pin 7 | NC | No connection, connect to GND for optimal ESD performance | - |
