Product Overview
The Allegro A1366 is a factory-programmable linear Hall-effect current sensor IC designed 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 such as HEV inverters, DC-to-DC converters, and electric power steering (EPS). 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. It incorporates advanced BiCMOS interface circuitry, a low-noise amplifier, and dynamic offset cancellation for industry-leading sensing resolution at a 120 kHz bandwidth. Additional features include built-in broken ground wire detection and undervoltage lockout for enhanced reliability in automotive environments.
Product Attributes
- Brand: Allegro
- Technology: Linear Hall-effect
- Programming: Factory-programmable
- Temperature Compensation: Proprietary linear interpolated
- Output: Ratiometric voltage output
- Certifications: AEC-Q100 automotive qualified
- Package: 4-pin SIP (suffix KT)
- Lead-Free: Yes
- Lead Plating: 100% matte tin
Technical Specifications
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| General Electrical Characteristics | ||||||
| Supply Voltage | VCC | 4.5 | 5.0 | 5.5 | V | |
| Supply Current | ICC | No load on VOUT | 10 | 15 | mA | |
| Internal Bandwidth | BWi | Small signal 3 dB, CL = 1 nF, TA = 25C | 120 | kHz | ||
| Performance Characteristics (TA = 40C to 150C, CBYPASS = 0.1 F, VCC = 5 V) | ||||||
| Sensitivity (Typ.) | SensTA | Measured using 600 G, TA = 25C (A1366LKT-1-T) | 0.975 | 1 | 1.025 | mV/G |
| Sensitivity (Typ.) | SensTA | Measured using 400 G, TA = 25C (A1366LKT-2-T) | 2.437 | 2.5 | 2.563 | mV/G |
| Sensitivity (Typ.) | SensTA | Measured using 200 G, TA = 25C (A1366LKT-5-T) | 4.875 | 5 | 5.125 | mV/G |
| Sensitivity (Typ.) | 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 | % |
| Quiescent Output Voltage (Typ.) | VOUT(Q)TA | TA = 25C | 2.490 | 2.500 | 2.510 | V |
| Noise (Peak-to-Peak) | VN | TA = 25C, CL = 1 nF | 3.15 (LKT-1-T) | mVP-P | ||
| Noise (Peak-to-Peak) | VN | TA = 25C, CL = 1 nF | 7.875 (LKT-2-T) | mVP-P | ||
| Noise (Peak-to-Peak) | VN | TA = 25C, CL = 1 nF | 15.75 (LKT-5-T) | mVP-P | ||
| Noise (Peak-to-Peak) | VN | TA = 25C, CL = 1 nF | 31.5 (LKT-10-T) | mVP-P | ||
| Operating Ambient Temperature | TA | 40 | 150 | C | ||
| Storage Temperature | Tstg | 65 | 165 | C | ||
| Package Thermal Resistance | RJA | On 1-layer PCB with exposed copper limited to solder pads | 174 | C/W | ||
| Selection Guide | ||||||
| Part Number | Leadform | Package | Sensitivity (Typ.) | |||
| A1366LKTTN-1-T | TN (Straight) | 4-pin SIP | 1 mV/G | |||
| A1366LKTTN-2-T | TN (Straight) | 4-pin SIP | 2.5 mV/G | |||
| A1366LKTTN-5-T | TN (Straight) | 4-pin SIP | 5 mV/G | |||
| A1366LKTTN-10-T | TN (Straight) | 4-pin SIP | 10 mV/G | |||
2304140030_ALLEGRO-A1366LKTTN-2-T_C2654936.pdf
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