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A1142EUATI-T4 参数 Datasheet PDF下载

A1142EUATI-T4图片预览
型号: A1142EUATI-T4
PDF下载: 下载PDF文件 查看货源
内容描述: 灵敏双线式稳定斩波型单极霍尔效应开关 [Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches]
分类和应用: 开关
文件页数/大小: 13 页 / 344 K
品牌: ALLEGRO [ ALLEGRO MICROSYSTEMS ]
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Sensitive Two-Wire Chopper-Stabilized  
Unipolar Hall Effect Switches  
A1140, A1141,  
A1142, and A1143  
Functional Description  
Operation  
The output, ICC, of the A1140 and A1142 devices switch low  
after the magnetic field at the Hall sensor exceeds the operate  
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 A1141 and A1143 devices switch with opposite polarity for  
similar BOP and BRP values, in comparison to the A1140 and  
A1142 (see figure 1).  
I+  
I+  
ICC(H)  
ICC(H)  
ICC(L)  
ICC(L)  
0
0
B+  
B–  
B+  
B–  
BHYS  
BHYS  
(A) A1140, A1142  
(B) A1141, A1143  
Figure 1. Alternative switching behaviors are available in the A114x 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).  
Allegro MicroSystems, Inc.  
7
115 Northeast Cutoff, Box 15036  
Worcester, Massachusetts 01615-0036 (508) 853-5000  
www.allegromicro.com