Sensors
Linear Hall-effect sensor ICs are factory programmed to optimise customer designs
The new A1388 and A1389 linear Hall-effect sensor ICs from Allegro MicroSystems Europe are factory one-time programmable devices which eliminate the need for customers to optimise or program the devices for their finished sensor assemblies. The new sensor ICs are targeted at displacement and angular positioning sensing in the automotive, industrial and consumer market sectors.
The The architecture of the A1388 and A1389 allows them to support magnetic input sensitivity ranges of 2.0 to 4.0 mV/G and 4.0 to 9.0 mV/G, respectively, but the devices initially being released are factory-programmed to specific magnetic input sensitivity levels.
The devices that are initially being released are the A1388LLHLX-2-T with 2.5 mV/G sensitivity, the A1389LLHLX-9-T with 9 mV/G sensitivity, and the A1389LLHLX-RP9-T with -9 mV/G sensitivity.
The temperature coefficients for both sensitivity and the quiescent voltage output are programmed over temperature to maximise accuracy and minimise distribution tolerances. The A1388 and A1389 provide low output noise (15 mV p-p at 9.0 mV/G sensitivity for the A1389) and reduced EMI susceptibility at various frequencies. They also support a fast refresh rate of 20 kHz for high-bandwidth applications.
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