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 its operating temperature range. This IC is ideal for demanding applications such as HEV inverters, DC-to-DC converters, and electric power steering (EPS). Its ratiometric analog output is proportional to the applied magnetic field, offering industry-leading sensing resolution at a 120 kHz bandwidth. The device also includes built-in broken ground wire detection for enhanced reliability in automotive environments.
Product Attributes
- Brand: Allegro
- Package Type: 4-pin SIP (suffix KT)
- Leadform Options: TN (Straight), TH
- Material: Lead (Pb) free, 100% matte tin leadframe plating
- Certifications: AEC-Q100 automotive qualified
- Temperature Compensation: Proprietary segmented linear interpolated
- Output Type: Ratiometric analog voltage output
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 | ||
| Broken Wire Voltage | VBRK(HIGH) | TA = 25C, RL(PULLUP) = 10 k to VCC | VCC | V | ||
| Broken Wire Voltage | VBRK(LOW) | TA = 25C, RL(PULLDWN) = 10 k to GND | 100 | mV | ||
| PERFORMANCE CHARACTERISTICS | ||||||
| Sensitivity Drift through Temperature Range | SensTC | TA = 25C to 150C | 2.5 | 0 | 2.5 | % |
| Sensitivity Drift through Temperature Range | SensTC | TA = 40C to 25C | 2.5 | 0 | 2.5 | % |
| Sensitivity Drift Due to Package Hysteresis | SensPKG | TA = 25C, after temperature cycling, 25C to 150C and back to 25C | 1.25 | % | ||
| Sensitivity Drift Over Lifetime | SensLIFE | TA = 40C to 150C, shift after AEC-Q100 grade 0 qualification testing | 1 | % | ||
| Quiescent Output Voltage | VOUT(Q)TA | TA = 25C | 2.490 | 2.500 | 2.510 | V |
| Quiescent Output Voltage Drift Over Lifetime | VOUT(Q)LIFE | TA = 40C to 150C, shift after AEC-Q100 grade 0 qualification testing | 2 | mV | ||
| SELECTION GUIDE | ||||||
| Part Number | Leadform | Package | Sensitivity (Typ.) (mV/G) | |||
| A1366LKTTN-1-T | TN (Straight) | 4-pin SIP | 1 | |||
| A1366LKTTN-2-T | TN (Straight) | 4-pin SIP | 2.5 | |||
| A1366LKTTN-5-T | TN (Straight) | 4-pin SIP | 5 | |||
| A1366LKTTN-10-T | TN (Straight) | 4-pin SIP | 10 | |||
| General Specifications | ||||||
| Operating Ambient Temperature | TA | 40 | 150 | C | ||
| Package Case Thickness | 1 | mm | ||||
| Bandwidth | Nominal | 120 | kHz | |||
2401220948_ALLEGRO-A1366LKTTF-1-T_C19761414.pdf
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