參數資料
型號: A1141EUA
廠商: Allegro MicroSystems, Inc.
英文描述: Sensitive Two-Wire Chopper-Stabilized Unipolar Hall-Effect Switches
中文描述: 敏感的兩線斬波穩(wěn)定單極霍爾效應開關
文件頁數: 6/11頁
文件大?。?/td> 393K
代理商: A1141EUA
6
A1140-DS
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Sensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches
A1140/41/42/43
Functional Description
B
O
B
R
B
HYS
I
CC(H)
I
C
I
CC(L)
S
S
B+
B–
I+
0
(A) A1140, A1142
B
O
B
R
B
HYS
I
CC(H)
I
C
I
CC(L)
S
S
B+
I+
B–
0
(B) A1141, A1143
Operation
The output, I
CC
, of the A1140 and A1142 devices switch low
after the magnetic
fi
eld at the Hall sensor exceeds the oper-
ate point threshold, B
OP
. When the magnetic
fi
eld is reduced to
below the release point threshold, B
RP
, the device output goes
high. The differences between the magnetic operate and release
point is called the hysteresis of the device, B
HYS
. 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 B
OP
and B
RP
values, in comparison to the A1140 and
A1142 (see
fi
gure 1).
Figure 1. Alternative switching behaviors are available in the A114x device family. On the horizontal axis, the B+ direction indicates
increasing south polarity magnetic
fi
eld strength, and the B– direction indicates decreasing south polarity
fi
eld strength (including the
case of increasing north polarity).
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