參數(shù)資料
型號(hào): A1143LUA-T
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(yīng)開關(guān)
文件頁數(shù): 7/13頁
文件大?。?/td> 354K
代理商: A1143LUA-T
Sensitive Two-Wire Chopper-Stabilized
Unipolar Hall Effect Switches
A1140, A1141,
A1142, and A1143
7
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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 field at the Hall sensor exceeds the operate
point threshold, B
OP
. When the magnetic field 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 figure 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 field strength, and the B– direction indicates decreasing south polarity field strength (including the
case of increasing north polarity).
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