Chopper Stabilized Precision Hall Effect Switches
A1120, A1121, A1122,
A1123, and A1125
4
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
ELECTRICAL CHARACTERISTICS Valid over full operating voltage and ambient temperature ranges; unless otherwise noted
Characteristics
Symbol
Test Conditions
Min. Typ.
1
Max. Unit
2
Electrical Characteristics
Forward Supply Voltage
V
CC
Operating, T
J
< 165癈
3
24
V
Output Leakage Current
I
OUTOFF
A1120
A1121
A1122
A1123
V
OUT
= 24 V, B < B
RP
10
糀
A1125 V
OUT
= 24 V, B > B
OP
10
糀
Output Saturation Voltage
V
OUT(SAT)
A1120
A1121
A1122
A1123
I
OUT
= 20 mA, B > B
OP
185 500 mV
A1125 I
OUT
= 20 mA, B < B
RP
185 500 mV
Output Current Limit
I
OM
A1120
A1121
A1122
A1123
B > B
OP
30
60
mA
A1125 B < B
RP
30
60
mA
Power-On Time
3
t
PO
V
CC
> 3.0 V, B < B
RP
(min) 10 G,
B > B
OP
(max) + 10 G
25
約
Chopping Frequency
f
C
800
kHz
Output Rise Time
3,4
t
r
R
L
= 820 ? C
S
= 20 pF
0.2 2
約
Output Fall Time
3,4
t
f
R
L
= 820 ? C
S
= 20 pF
0.1 2
約
Supply Current
I
CC(ON)
A1120
A1121
A1122
A1123
V
CC
= 12 V, B > B
OP
4
mA
A1125 V
CC
= 12 V, B < B
RP
4
mA
I
CC(OFF)
A1120
A1121
A1122
A1123
V
CC
= 12 V, B < B
RP
4
mA
A1125 V
CC
= 12 V, B > B
OP
4
mA
Reverse Supply Current
I
RCC
V
RCC
= 30 V
5
mA
Supply Zener Clamp Voltage
V
Z
I
CC
= 5 mA; T
A
= 25癈
28
V
Zener Impedance
I
Z
I
CC
= 5 mA; T
A
= 25癈
50
?/DIV>
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