资 源 简 介
The A3425 is a dual–output-channel, bipolar switch witheach channel comprising a separate complete Hall-effectsensor circuit with dedicated Hall element and separate digitaloutput for speed and direcTIon signal processing capability. Theindependent Hall elements (E1 integrated with OUTPUTA, andE2 integrated with OUTPUTB) are photolithographically alignedto better than 1 μm. Maintaining this accurate mechanicallocaTIon between the two acTIve Hall elements eliminates themajor manufacturing hurdle encountered in fine-pitch detecTIonapplications. The A3425 is a highly sensitive, temperature-stablemagnetic sensing device, which is ideal for use in ring magnetbasedspeed and direction systems used in harsh automotiveand industrial environments.The A3425 contains two independent Hall effect switches, andhas a monolithic IC that accurately locates the two Hall elements,E1 and E2, approximately 1 mm apart. The digital outputs are90º out of phase so that the outputs are in quadrature, with theproper ring magnet design. This allows for easy processing ofspeed and direction signals. Extremely low-drift amplifiersguarantee symmetry between the switches to maintain signal
