A1363: Low Noise, High Precision, Programmable Linear Hall Effect Sensor IC With Advanced Temperature Compensation and High Bandwidth (120 kHz) Analog Output

The Allegro A1363 programmable linear Hall-effect current sensor IC has been designed to achieve high accuracy and resolution without compromising bandwidth. The 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 done in the digital domain with integrated EEPROM technology, without sacrificing the analog signal path 120 kHz bandwidth, making this device ideal for HEV inverter and DC-to-DC converter 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 V_CC and output pins, to optimize performance in the end application. The quiescent output voltage is user-adjustable around 50% of the supply voltage, V_CC , and the output sensitivity is adjustable within the range of 0.6 to 14 mV/G.

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, a clamped low-impedance output stage, and a proprietary, high bandwidth dynamic offset cancellation technique. These advances in Hall-effect technology work together to provide an industry leading sensing resolution at the full 120 kHz bandwidth. Broken ground wire detection as well as user-selectable output voltage clamps also are built into this device, for high reliability in automotive applications.

The A1363 sensor IC is offered in an extremely thin package: 1 mm case thickness KT package and surface mount TSSOP8 LU package that are lead (Pb) free, with 100% matte tin lead frame plating.