Product Overview
The Allegro A1366 is a factory-programmable linear Hall-effect current sensor IC engineered for high accuracy and resolution. It features proprietary linearly interpolated temperature compensation technology, ensuring virtually flat sensitivity and offset across its operating temperature range. This makes it ideal for demanding current sensing applications in HEV inverters, DC-to-DC converters, and electric power steering (EPS) systems. The device offers a ratiometric voltage output proportional to the applied magnetic field, with factory-programmed sensitivity and quiescent voltage for accuracy under 1% typical over temperature. Its design incorporates a highly sensitive Hall element, a low-noise BiCMOS interface, and advanced dynamic offset cancellation, achieving an industry-leading sensing resolution at a 120 kHz bandwidth. Built-in broken ground wire detection enhances reliability in automotive environments.
Product Attributes
- Brand: Allegro
- Certifications: AEC-Q100 automotive qualified
- Lead-Free: Yes
- Leadframe Plating: 100% matte tin
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 | VSAT(HIGH) | TA = 25C, RL(PULLDWN) = 10 k to GND | 4.7 | V | ||
| Output Saturation Voltage | VSAT(LOW) | TA = 25C, RL(PULLUP) = 10 k to VCC | 400 | mV | ||
| 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 | ||
| Noise | BN | TA = 25C, CL = 1 nF, Bandwidth = BWi | 1.1 | mGRMS/(Hz) | ||
| PERFORMANCE CHARACTERISTICS (TA = 40C to 150C) | ||||||
| Sensitivity | SensTA | Measured using 600 G, TA = 25C (A1366LKT-1-T) | 0.975 | 1 | 1.025 | mV/G |
| Sensitivity | SensTA | Measured using 400 G, TA = 25C (A1366LKT-2-T) | 2.437 | 2.5 | 2.563 | mV/G |
| Sensitivity | SensTA | Measured using 200 G, TA = 25C (A1366LKT-5-T) | 4.875 | 5 | 5.125 | mV/G |
| Sensitivity | SensTA | Measured using 100 G, TA = 25C (A1366LKT-10-T) | 9.75 | 10 | 10.25 | mV/G |
| 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 | % | ||
| Quiescent Output Voltage | VOUT(Q)TA | TA = 25C | 2.490 | 2.500 | 2.510 | V |
| Quiescent Output Voltage | VOUT(Q)HT | TA = 25C to 150C | 2.490 | 2.500 | 2.510 | V |
| Quiescent Output Voltage | VOUT(Q)LT | TA = 40C to 25C | 2.490 | 2.500 | 2.510 | V |
| PACKAGE DIMENSIONS (KT Package, 4-Pin SIP) | ||||||
| Case Thickness | 1.00 | mm | ||||
| Overall Height | 12.14 | 0.05 | mm | |||
| Overall Width | 5.21 | +0.08/-0.05 | mm | |||
| Overall Depth | 3.43 | +0.08/-0.05 | mm | |||
2504101957_ALLEGRO-A1366LKTTN-1-T_C17612747.pdf
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