Product Overview
The A17501 is a single IC solution for rotational position sensing of ring magnet targets in automotive and industrial electric motor applications. It features three Hall elements creating two independent differential channels, processed by digital circuits and algorithms to eliminate offsets and vibration-induced false transitions. The IC provides accurate speed and direction information, with advanced calibration for consistent performance across varying air gaps, speeds, and temperatures. It is programmable for dual-phase speed/position or high-resolution speed/direction, and supports Fault Detection mode for ASIL B(D) utilization.
Product Attributes
- Brand: Allegro MicroSystems
- Package: 4-Pin SIP (K package)
- Material: Lead (Pb) free with 100% matte-tin-plated lead frame
- Certifications: ASIL B(D) compliant (ISO 26262), assessment pending
Technical Specifications
| Characteristic | Symbol | Notes | Rating | Unit |
| Supply Voltage | VCC | Refer to Power Derating section | 28 | V |
| Reverse Supply Voltage | VRCC | 18 | V | |
| Output Voltage | VOUT | Each output pin | 28 | V |
| Reverse Output Voltage | VROUT | Each output pin; RPULLUP 1 k | 0.5 | V |
| Output Sink Current | IOUT | Short-term output current for OUTA and OUTB independently, not intended for continuous operation | 50 | mA |
| Operating Ambient Temperature Range | TA | 40 to 160 | C | |
| Junction Temperature | TJ | 175 | C | |
| Storage Temperature Range | Tstg | 65 to 170 | C | |
| Supply Voltage | VCC | Voltage across VCC and GND | 4 24 | V |
| Undervoltage Lockout | VCC(UV) | 3.99 | V | |
| Supply Current | ICC | 10 15 | mA | |
| Reverse Supply Current | IRCC | VCC = 18 V | 10 | mA |
| Power-On Time | tPO | Time from VCC > VCC(min) to when sensor IC output is valid | 1 | ms |
| Output Low Voltage | VOUT(LOW) | Fault Detection Mode disabled; IOUT = 10 mA | 0.165 0.35 | V |
| Output High Voltage | VOUT(HIGH) | Fault Detection Mode disabled | VPULLUP | V |
| Fault Voltage (High) | VFAULT(HIGH) | Fault Detection Mode enabled; 5 V, 1 k or 5 V, 3 k option | 4.5 | V |
| Fault Voltage (Mid) | VFAULT(MID) | Fault Detection Mode enabled; 5 V, 1 k or 5 V, 3 k option | 1.25 3.75 | V |
| Fault Voltage (Low) | VFAULT(LOW) | Fault Detection Mode enabled; 5 V, 1 k or 5 V, 3 k option | 0.5 | V |
| Allowable Pullup Voltage | VPULLUP | Fault Detection Mode disabled | 4 24 | V |
| Allowable Pullup Resistor | RPULLUP | Fault Detection Mode enabled; 5 V, 1 k option | 0.8 1.46 | k |
| Allowable Load Capacitor | CLOAD | Fault Detection Mode enabled | 1 | nF |
| Output Leakage Current | IOUT(OFF) | Fault Detection Mode disabled; VOUT = VOUT(HIGH) | 10 | A |
| Duty Cycle | D | Speed output protocol; Dynamic Threshold option; sinusoidal input signal; fOP < 1 kHz | 45 50 55 | % |
| Output Rise Time | tr | 10%90%; VPULLUP = 5 V; RPULLUP = 1 k; CLOAD = 2.2 nF | 5 | s |
| Output Fall Time | tf | 90%10%; Fault Detection Mode disabled; Slow fall time option | 3.5 | s |
| Propagation Delay | td | Delay from the magnetic signal crossing a switch point threshold to the start of the output transition | 8 | s |
| Jitter | BDIFF(pk-pk) = 100 G; sinusoidal input signal; fOP = 1 kHz | 0.13 | target degrees |
2504101957_ALLEGRO-A17501POKATN-SDFUYJE_C17615251.pdf
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