High accuracy/resolution programmable linear Hall-effect sensor IC

February 08, 2017 // By Graham Prophet
The A1377 from Allegro MicroSystems Europe uses segmented, linearly interpolated temperature compensation technology which greatly reduces the total error of the device across the whole temperature range. It is suited to linear and rotary position in automotive applications such as actuators and valves.

The IC is available in a through-hole, small form factor, single in-line package (SIP) and has a 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 adjusted to the application. As a ratiometric Hall-effect sensor IC it 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 1 to 14 mV/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. In automotive and industrial applications it operates over -40°C to +150°C. It occupies a 3-pin single in-line package with bypass capacitors integrated into the package.


Allegro MicroSystems; www.allegromicro.com