A1367 Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC with Regulated Supply, Advanced Temperature Compensation, and High-Bandwidth (240 kHz) Analog Output FEATURES AND BENEFITS • 240 kHz nominal bandwidth achieved via proprietary packaging and chopper stabilization techniques • On-board supply regulator with reverse-battery protection • Proprietary segmented linear temperature compensation (TC) technology provides a typical accuracy of 1% over the full operating temperature range • Customer-programmable, high-resolution offset and sensitivity trim • Factory-programmed sensitivity and quiescent output voltage TC with extremely stable temperature performance • High-sensitivity Hall element for maximum accuracy • Extremely low noise and high resolution achieved via proprietary Hall element and low-noise amplifier circuits Continued on the next page… The Allegro™ A1367 programmable linear Hall-effect current sensor IC has been designed to achieve high accuracy and resolution without compromising bandwidth. This goal is achieved through new proprietary linearly interpolated temperature compensation technology that is programmed at the Allegro factory and provides sensitivity and offset that are virtually flat across the full operating temperature range. Temperature compensation is performed in the digital domain with integrated EEPROM technology while maintaining a 240 kHz bandwidth analog signal path, 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. The customer can configure the sensitivity and quiescent (zero field) output voltage through programming on the VCC and output pins, to optimize performance in the end application. The quiescent output voltage is user-adjustable, around 50% (bidirectional configuration) or 10% (unidirectional configuration) of the supply voltage, VCC, and the output sensitivity is adjustable within the range of 0.6 to 6.4 mV/G. Continued on the next page… Programming Control Undervoltage Detection Charge Pump Pulse Generator Dynamic Offset Cancellation Temperature Sensor Sensitivity Control EEPROM and Control Logic Active Temp. Compensation Offset Control Push/Pull Output Driver Functional Block Diagram Output Clamps VOUT (Programming) Signal Recovery

Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC A1367 with Regulated Supply, Advanced Temperature Compensation, and High-Bandwidth (240 kHz) Analog Output FEATURES AND BENEFITS (CONTINUED) • Patented circuits suppress IC output spiking during fast current step inputs • Open circuit detection on ground pin (broken wire) • Selectable sensitivity range between 0.6 and 6.4 mV/G through use of coarse sensitivity program bits • User-selectable ratiometric behavior of sensitivity, quiescent voltage, and clamps (ratiometry can be disabled), for simple interface with application A-to-D...

Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC with Regulated Supply, Advanced Temperature Compensation, and High-Bandwidth (240 kHz) Analog Output SPECIFICATIONS Absolute Maximum Ratings Characteristic TJ(max) should not be exceeded Reverse Supply Voltage Forward Supply Voltage Forward Output Voltage Reverse Output Voltage Difference between VCC and output should not exceed 20 V Output Source Current Output Sink Current Maximum Number of EEPROM Write Cycles Operating Ambient Temperature Storage Temperature Maximum Junction Temperature Thermal Characteristics: May require...

Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC with Regulated Supply, Advanced Temperature Compensation, and High-Bandwidth (240 kHz) Analog Output Pinout Diagram and Terminal List Table Terminal List Table Number 1 Function Input Power Supply, use bypass capacitor to connect to ground; also used for programming Output Signal, also used for programming No connection; connect to GND for optimal ESD performance Ground KT Package Pinout Diagram (Ejector pin mark on opposite side) Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000;...

Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC with Regulated Supply, Advanced Temperature Compensation, and High-Bandwidth (240 kHz) Analog Output OPERATING CHARACTERISTICS: Valid through the full operating temperature range, TA, CBYPASS = 0.1 µF, VCC = 5 V, unless otherwise specified Characteristic Test Conditions ELECTRICAL CHARACTERISTICS Supply Voltage Supply Current TA = 25°C, CBYPASS = open, CL = 1 nF, Sens = 2 mV/G, constant magnetic field of 400 G Temperature Compensation Power-On Time2 TA = 150°C, CBYPASS = open, CL = 1 nF, Sens = 2 mV/G, constant magnetic field...

Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC with Regulated Supply, Advanced Temperature Compensation, and High-Bandwidth (240 kHz) Analog Output OPERATING CHARACTERISTICS (continued): Valid through the full operating temperature range, TA, CBYPASS = 0.1 µF, VCC = 5 V, unless otherwise specified Characteristic Test Conditions OUTPUT CHARACTERISTICS (continued) DC Output Resistance Output Load Resistance Output Load Capacitance6 Output Slew QUIESCENT VOLTAGE OUTPUT (VOUT(Q))2 Initial Unprogrammed Quiescent Voltage Output2,8 Quiescent Voltage Output Programming Range2,4,9...

Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC with Regulated Supply, Advanced Temperature Compensation, and High-Bandwidth (240 kHz) Analog Output OPERATING CHARACTERISTICS (continued): Valid through the full operating temperature range, TA, CBYPASS = 0.1 µF, VCC = 5 V, unless otherwise specified Characteristic Test Conditions FACTORY-PROGRAMMED QUIESCENT VOLTAGE OUTPUT TEMPERATURE COEFFICIENT Quiescent Voltage Output Temperature Coefficient2 Quiescent Voltage Output Drift Through Temperature Range2,9,15 Average Quiescent Voltage Output Temperature Compensation Step Size...