Product Overview
The Allegro A1366 is a factory-programmable linear Hall-effect current sensor IC designed for high accuracy and resolution in current sensing applications. It features proprietary linearly interpolated temperature compensation technology, ensuring virtually flat sensitivity and offset across the operating temperature range. This IC is ideal for demanding applications such as HEV inverters, DC-to-DC converters, and electric power steering (EPS). It offers a ratiometric voltage output proportional to the applied magnetic field, with factory-programmed sensitivity and quiescent voltage for accuracy better than 1% typical over temperature. Advanced features include low noise, high-speed operation up to 120 kHz bandwidth, dynamic offset cancellation, and built-in broken ground wire detection for enhanced reliability in automotive environments.
Product Attributes
- Brand: Allegro
- Technology: Linear Hall-effect sensor IC
- Programming: Factory-programmable
- Compensation: Proprietary linearly interpolated temperature compensation
- Certifications: AEC-Q100 automotive qualified
- Package: 4-pin SIP (suffix KT), 1 mm case thickness, lead (Pb) free, 100% matte tin leadframe plating
- Leadform Options: TN (Straight), TH
Technical Specifications
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| ELECTRICAL CHARACTERISTICS | ||||||
| Supply Voltage | VCC | 4.5 | 5.0 | 5.5 | V | |
| Supply Current | ICC | No load on VOUT | 10 | 15 | mA | |
| Power-On Time | tPO | TA = 25C, CBYPASS = Open, CL = 1 nF, Sens = 2.5 mV/G, constant magnetic field of 320 G | 78 | s | ||
| Temperature Compensation Power-On Time | tTC | TA = 150C, CBYPASS = Open, CL= 1 nF, Sens = 2.5 mV/G, constant magnetic field of 320 G | 30 | s | ||
| Undervoltage Lockout (UVLO) Threshold | VUVLOH | TA = 25C, VCC rising and device function enabled | 4 | V | ||
| Undervoltage Lockout (UVLO) Threshold | VUVLOL | TA = 25C, VCC falling and device function disabled | 3.5 | V | ||
| UVLO Enable/Disable Delay Time | tUVLOE | TA = 25C, CBYPASS = Open, CL = 1 nF, Sens = 2.5 mV/G, VCC Fall Time (5 V to 3 V) = 1.5 s | 64 | s | ||
| UVLO Enable/Disable Delay Time | tUVLOD | TA = 25C, CBYPASS = Open, CL = 1 nF, Sens = 2.5 mV/G, VCC Recover Time (3 V to 5 V) = 1.5 s | 14 | s | ||
| Power-On Reset Voltage | VPORH | TA = 25C, VCC rising | 2.6 | V | ||
| Power-On Reset Voltage | VPORL | TA = 25C, VCC falling | 2.3 | V | ||
| Power-On Reset Release Time | tPORR | TA = 25C, VCC rising | 64 | s | ||
| Internal Bandwidth | BWi | Small signal 3 dB, CL = 1 nF, TA = 25C | 120 | kHz | ||
| OUTPUT CHARACTERISTICS | ||||||
| Propagation Delay Time | tPD | TA = 25C, magnetic field step of 320 G, CL = 1 nF, Sens = 2.5 mV/G | 2.2 | s | ||
| Rise Time | tR | TA = 25C, magnetic field step of 320 G, CL = 1 nF, Sens = 2.5 mV/G | 3.6 | s | ||
| Response Time | tRESPONSE | TA = 25C, magnetic field step of 320 G, CL = 1 nF, Sens = 2.5 mV/G | 3.7 | s | ||
| Output Saturation Voltage (High) | VSAT(HIGH) | TA = 25C, RL(PULLDWN) = 10 k to GND | 4.7 | V | ||
| Output Saturation Voltage (Low) | VSAT(LOW) | TA = 25C, RL(PULLUP) = 10 k to VCC | 400 | mV | ||
| Broken Wire Voltage (High) | VBRK(HIGH) | TA = 25C, RL(PULLUP) = 10 k to VCC | VCC | V | ||
| Broken Wire Voltage (Low) | VBRK(LOW) | TA = 25C, RL(PULLDWN) = 10 k to GND | 100 | mV | ||
| Noise | BN | TA = 25C, CL = 1 nF, Bandwidth = BWi | 1.1 | mGRMS/(Hz) | ||
| ERROR COMPONENTS | ||||||
| Linearity Sensitivity Error | LinERR | -1 < 0.25 | 1 | % | ||
| Symmetry Sensitivity Error | SymERR | -1 < 0.25 | 1 | % | ||
| Ratiometry Quiescent Voltage Output Error | RatERRVOUT(Q) | Through supply voltage range (relative to VCC = 5 V) | -1 | 0 | 1 | % |
| Ratiometry Sensitivity Error | RatERRSens | Through supply voltage range (relative to VCC = 5 V) | 1 | % | ||
| PERFORMANCE CHARACTERISTICS | ||||||
| Model | Sensitivity (Typ.) | Package | Leadform | Operating Temperature Range | Accuracy (Typical) | Bandwidth |
| A1366LKT-1-T | 1 mV/G | 4-pin SIP | TN | 40C to 150C | 1% | 120 kHz |
| A1366LKT-2.5-T | 2.5 mV/G | 4-pin SIP | TN | 40C to 150C | 1% | 120 kHz |
| A1366LKT-5-T | 5 mV/G | 4-pin SIP | TN | 40C to 150C | 1% | 120 kHz |
| A1366LKT-10-T | 10 mV/G | 4-pin SIP | TN | 40C to 150C | 1% | 120 kHz |
2401220948_ALLEGRO-A1366LKTTG-2-T_C19761420.pdf
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