A1366 Low Noise, High Precision, Factory-Programmed Linear Hall Effect Sensor IC With Advanced Temperature Compensation and High Bandwidth (120 kHz) Analog Output Description Factory programmed sensitivity and quiescent output voltage with high resolution Proprietary segmented linear interpolated temperature compensation (TC) technology provides a typical accuracy of 1% across the full operating temperature range Extremely low noise and high resolution achieved via proprietary Hall element and low noise amplifier circuits 120 kHz nominal bandwidth achieved via proprietary packaging and chopper stabilization techniques Patented circuits suppress IC output spiking during fast current step inputs Open circuit detection on ground pin (broken wire) Undervoltage lockout for VCC below specification Continued on the next page… The Allegro™ A1366 factory-programmable linear Halleffect current sensor IC has been designed to achieve high accuracy and resolution. The goal is achieved through new proprietary linearly interpolated temperature compensation technology that is programmed at the Allegro factory, which provides sensitivity and offset that are virtually flat across the full operating temperature range. The flat performance over temperature makes this IC ideally suited for current sensing applications. Temperature compensation is done in the digital domain with integrated EEPROM technology without sacrificing the analog signal path bandwidth, making this device ideal for HEV inverter, DC-to-DC converter, and electric power steering (EPS) applications. This ratiometric Hall-effect sensor IC provides a voltage output that is proportional to the applied magnetic field. Sensitivity and quiescent (zero field) output voltage are factory programmed with high resolution which provides for an accuracy of less than ±1%, typical, over temperature. The sensor IC incorporates a highly sensitive Hall element with a BiCMOS interface integrated circuit that employs a low noise, small-signal high-gain amplifier, as well as a low-impedance output stage, and a proprietary, high bandwidth dynamic offset Not to scale Continued on the next page… Functional Block Diagram V+ VCC Programming Control Temperature Sensor Dynamic Offset Cancellation Sensitivity Control EEPROM and Control Logic Signal Recovery

Low Noise, High Precision, Factory-Programmed Linear Hall Effect Sensor IC with Advanced Temperature Compensation And High Bandwidth (120 kHz) Analog Output Features and Benefits (continued) Description (continued) cancellation technique. These advances in Hall-effect technology work together to provide an industry leading sensing resolution at the full 120 kHz bandwidth. The device has built in broken ground wire detection for high reliability in automotive applications. Ratiometric sensitivity and quiescent voltage output Precise recoverability after temperature cycling Wide ambient temperature...

Low Noise, High Precision, Factory-Programmed Linear Hall Effect Sensor IC with Advanced Temperature Compensation And High Bandwidth (120 kHz) Analog Output Absolute Maximum Ratings Rating Forward Supply Voltage Reverse Supply Voltage Forward Output Voltage Reverse Output Voltage Output Source Current Output Sink Current Storage Temperature Maximum Junction Temperature Terminal List Table Number Operating Ambient Temperature Pin-out Diagram Function Input power supply, use bypass capacitor to connect to ground Output signal No connection; connect to GND for optimal ESD performance Ground (Ejector...

Low Noise, High Precision, Factory-Programmed Linear Hall Effect Sensor IC with Advanced Temperature Compensation And High Bandwidth (120 kHz) Analog Output Thermal Characteristics may require derating at maximum conditions, see application information Characteristic Symbol RθJA Package Thermal Resistance Test Conditions* On 1-layer PCB with exposed copper limited to solder pads *Additional thermal information available on the Allegro website Power Dissipation versus Ambient Temperature 900 800 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000;...

Low Noise, High Precision, Factory-Programmed Linear Hall Effect Sensor IC with Advanced Temperature Compensation And High Bandwidth (120 kHz) Analog Output COMMON OPERATING CHARACTERISTICS Valid through the full operating temperature range, TA, CBYPASS = 0.1 µF, VCC = 5 V; unless otherwise specified Characteristics Test Conditions Electrical Characteristics Supply Voltage Supply Current TA = 25°C, CBYPASS = Open, CL = 1 nF, Sens = 2.5 mV/G, constant magnetic field of 320 G Temperature Compensation Power-On Time2 TA = 150°C, CBYPASS = Open, CL= 1 nF, Sens = 2.5 mV/G, constant magnetic field of...

Low Noise, High Precision, Factory-Programmed Linear Hall Effect Sensor IC with Advanced Temperature Compensation And High Bandwidth (120 kHz) Analog Output COMMON OPERATING CHARACTERISTICS (continued) Valid through the full operating temperature range, TA; CBYPASS = 0.1 µF, VCC = 5 V; unless otherwise specified Characteristics Test Conditions Output Characteristics (continued) Noise DC Output Resistance Output Load Resistance Output Load Capacitance4 Output Slew Error Components Linearity Sensitivity Error2,6 Symmetry Sensitivity Ratiometry Quiescent Voltage Output Error2,7 Ratiometry Sensitivity...

Low Noise, High Precision, Factory-Programmed Linear Hall Effect Sensor IC with Advanced Temperature Compensation And High Bandwidth (120 kHz) Analog Output A1366LKT-1-T PERFORMANCE CHARACTERISTICS1: TA = –40°C to 150°C, CBYPASS = 0.1 µF, VCC = 5 V, unless otherwise specified Characteristic Sensitivity3 Sensitivity Drift through Temperature Range Symbol SensTA ΔSensTC Test Conditions Sensitivity Drift Due to Package Hysteresis TA = 25°C, after temperature cycling, 25°C to 150°C and back to 25°C Sensitivity Drift Over Lifetime4 TA = –40°C to 150°C, shift after AEC Q100 grade 0 qualification Quiescent...