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 for virtually flat sensitivity and offset across its operating temperature range. This device is ideal for HEV inverters, DC-to-DC converters, and electric power steering (EPS) systems. The A1366 offers a ratiometric voltage output proportional to the applied magnetic field, with factory-programmed sensitivity and quiescent voltage for accuracy of less than 1% typical over temperature. It incorporates a low-noise amplifier, a low-impedance output stage, and a dynamic offset cancellation technique for industry-leading sensing resolution at a 120 kHz bandwidth. Built-in broken ground wire detection enhances reliability in automotive applications.
Product Attributes
- Brand: Allegro
- Certifications: AEC-Q100 automotive qualified
- Lead-free: Yes
- Lead plating: 100% matte tin
Technical Specifications
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| 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 High | VUVLOH | TA = 25C, VCC rising and device function enabled | 4 | V | ||
| Undervoltage Lockout (UVLO) Threshold Low | VUVLOL | TA = 25C, VCC falling and device function disabled | 3.5 | V | ||
| UVLO Enable 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 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 High | VPORH | TA = 25C, VCC rising | 2.6 | V | ||
| Power-On Reset Voltage Low | 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 | ||
| 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 | ||
| DC Output Resistance | ROUT | 9 | ||||
| Output Load Resistance (Pull-up) | RL(PULLUP) | VOUT to VCC | 4.7 | k | ||
| Output Load Resistance (Pull-down) | RL(PULLDWN) | VOUT to GND | 4.7 | k | ||
| Output Load Capacitance | CL | VOUT to GND | 1 | 10 | nF | |
| Output Slew Rate | SR | Sens = 2.5 mV/G, CL = 1 nF | 230 | V/ms | ||
| Linearity Sensitivity Error | LinERR | -1 | 0.25 | % | ||
| Symmetry Sensitivity Error | SymERR | -1 | 0.25 | % | ||
| 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 | % | ||
| 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 | ||
| Package Case Thickness | 1 | mm | ||||
| Sensitivity (Typ.) | Sens (mV/G) | A1366LKT-1-T | 1 | mV/G | ||
| Sensitivity (Typ.) | Sens (mV/G) | A1366LKT-2-T | 2.5 | mV/G | ||
| Sensitivity (Typ.) | Sens (mV/G) | A1366LKT-5-T | 5 | mV/G | ||
| Sensitivity (Typ.) | Sens (mV/G) | A1366LKT-10-T | 10 | mV/G |
2304140030_ALLEGRO-A1366LKTTN-5-T_C2654980.pdf
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