Programmable linear Hall-effect sensor IC designed for high accuracy applications

The new A1377 from Allegro MicroSystems is a programmable linear Hall-effect sensor IC designed for applications that require high accuracy and high resolution without compromising bandwidth. The new device uses segmented, linearly interpolated temperature compensation technology which greatly reduces the total error of the device across the whole temperature range. As a result, it is ideally suited to linear and rotary position in automotive applications such as actuators and valves. The device is available in a through-hole, small form factor, SIP and has a broad range of sensitivities and offset operating bandwidths. The accuracy and flexibility of this device is enhanced with user programmability, via the supply voltage (Vcc)and output pins, which allows it to be optimised to the application. This sensor IC provides a voltage output that is proportional to the applied magnetic field. The quiescent voltage output is user-adjustable from approximately 5% to 95% of the supply voltage. The device sensitivity is adjustable within the range of 1mV/G to 14mV/G. Each BiCMOS monolithic circuit integrates a Hall element, temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, a clamped low-impedance output stage and a proprietary dynamic offset cancellation technique. The features of this linear device make it ideal for use in automotive and industrial applications requiring high accuracy, and apply across an extended temperature range, from -40C to +150C. The sensor is provided in a three-pin single in-line package (UC suffix) with bypass capacitors integrated into the package. It is lead (Pb) free, with 100% matt-tin leadframe plating.