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A1182LUA Datasheet(PDF) 8 Page - Allegro MicroSystems |
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A1182LUA Datasheet(HTML) 8 Page - Allegro MicroSystems |
8 / 16 page 8 A1180-DS, Rev. 2 Worcester, Massachusetts 01615-0036 (508) 853-5000 115 Northeast Cutoff, Box 15036 www.allegromicro.com Allegro MicroSystems, Inc. Sensitive Two-Wire Field-Programmable Chopper-Stabilized Unipolar Hall Effect Switches A1180/81/82/83 Functional Description BHYS ICC(H) ICC(L) B+ B– I+ 0 (A) A1180 and A1182 BHYS ICC(H) ICC(L) B+ I+ B– 0 (B) A1181 and A1183 Operation The output, ICC, of the A1180 and A1182 devices switch low after the magnetic field at the Hall sensor exceeds the oper- ate point threshold, BOP. When the magnetic field is reduced to below the release point threshold, BRP, the device output goes high. The differences between the magnetic operate and release point is called the hysteresis of the device, BHYS. This built- in hysteresis allows clean switching of the output even in the presence of external mechanical vibration and electrical noise. The A1181 and A1183 devices switch with opposite polarity for similar BOP and BRP values, in comparison to the A1180 and A1183 (see figure 1). Figure 1. Alternative switching behaviors are available in the A118x device family. On the horizontal axis, the B+ direction indicates increasing south polarity magnetic field strength, and the B– direction indicates decreasing south polarity field strength (including the case of increasing north polarity). |
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