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 200 internal conductor resistance for ultra-low power loss. The device offers high-precision measurements with factory programming for sensitivity and quiescent output voltage, enhanced by chopper-stabilized signal paths and digital temperature compensation. Its integrated shield technology provides high-level immunity to current conductor dV/dt and stray electric fields, making it ideal for high-side, high-voltage applications. The sensor outputs an analog voltage (VOUT) that varies linearly with the primary current (IP) and incorporates common-mode field rejection for optimal performance in the presence of interfering magnetic fields.
Product Attributes
- Brand: Allegro MicroSystems
- Package Type: 7-pin PSOF (suffix LR)
- Certifications: AEC-Q100 automotive qualification
- Lead Finish: 100% matte tin
- Leadframe Material: Oxygen-free copper
- Material Compliance: Lead (Pb) free
Technical Specifications
| Feature/Model | Bidirectional 50 A (ACS780LLRTR-050B-T) | Unidirectional 0-50 A (ACS780LLRTR-050U-T) | Bidirectional 100 A (ACS780LLRTR-100B-T) | Unidirectional 0-100 A (ACS780LLRTR-100U-T) | Bidirectional 150 A transient / 100 A continuous (ACS780KLRTR-150B-T) | Unidirectional 0-150 A transient / 0-100 A continuous (ACS780KLRTR-150U-T) |
|---|---|---|---|---|---|---|
| Sensed Current (IP) | 50 A | 0 to 50 A | 100 A | 0 to 100 A | 150 A (transient), 100 A (continuous) | 0 to 150 A (transient), 0 to 100 A (continuous) |
| Sensitivity (Sens Typ.) | 40 mV/A | 60 mV/A | 20 mV/A | 40 mV/A | 13.33 mV/A | 26.66 mV/A |
| Operating Temperature (TOP) | -40 to 150 C | -40 to 150 C | -40 to 150 C | -40 to 150 C | -40 to 125 C | -40 to 125 C |
| Internal Conductor Resistance | 200 (typical) | |||||
| Supply Voltage (VCC) | 4.5 to 5.5 V (single supply) | |||||
| Bandwidth (typical) | 120 kHz | |||||
| Output Rise Time (3.6 s) | 3.6 s (in response to step input current) | |||||
| Overcurrent Capability (IPOC) | 285 A (TA = 25C, 1s on time) | |||||
| Package Thermal Resistance (RJA) | 18 C/W (mounted on Allegro evaluation board) | |||||
| Peak-to-Peak Noise (VNOISEPP) | 36 mV (X050B) | 54 mV (X050U) | 18 mV (X100B) | 36 mV (X100U) | 12 mV (X150B) | 24 mV (X150U) |
| Nonlinearity (ELIN) | -1 to 1 % | |||||
| Electrical Offset Voltage (VOE(TA)) | -10 to 10 mV (TA = 25C) | |||||
| Total Output Error (ETOT(HT)) | -3.25 to 3.25 % (TOP = 25C to 150C/125C) | |||||
| Total Output Error (ETOT(LT)) | -3.75 to 3.75 % (TOP = -40C to 25C) | |||||
| Power-On Time (tPO) | 130 s (typical, TA = 25C) | |||||
| Propagation Delay (tPD) | 2.5 s (typical, TA = 25C) | |||||
2201242200_ALLEGRO-ACS780LLRTR-050B-T_C459342.pdf
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