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Sensitive Two-Wire Chopper-Stabilized
Unipolar Hall Effect Switches
A1140, A1142, and
A1143
5
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Characteristic Data
 
 
0
2 
 
6
8 
10
 
 
 
 
 
 
 
 
 
 
 
 
 
Supply Current (Low) versus Ambient Temperature
at Various Levels of V
CC
(A1142 and A1143)
Supply Current (Low) versus Ambient Temperature
at Various Levels of V
CC
(A1140)
Ambient Temperature, T
A
 (癈)
Ambient Temperature, T
A
 (癈)
 
 
 
V
CC
  3.5 V
12.0 V
24.0 V
 
 
 
V
CC
  3.5 V
12.0 V
24.0 V
0
2
6
8
10
4
4
50 
0 
50 
100     150     200 
50 
0 
50 
100     150     200 
50 
0 
50 
100     150     200 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Operate Point versus Ambient Temperature
at Various Levels of V
CC
(A1140, A1142, and A1143)
Supply Current (High) versus Ambient Temperature
at Various Levels of V
CC
(A1140, A1142, and A1143)
Ambient Temperature, T
A
 (癈)
Ambient Temperature, T
A
 (癈)
 
 
 
V
CC
  3.5 V
12.0 V
24.0 V
 
 
 
V
CC
  3.5 V
12.0 V
24.0 V
10
12
16
18
20
14
50 
0 
50 
100     150     200 
 
 
 
 
 
 
 
 
 
 
Switchpoint Hysteresis versus Ambient Temperature
at Various Levels of V
CC
(A1140, A1142, and A1143)
Ambient Temperature, T
A
 (癈)
 
 
 
V
CC
  3.5 V
12.0 V
24.0 V
0
2
6
8
10
4
50 
0 
50 
100     150     200 
50
60
80
90
110
100
70
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