A1140, A1141,
A1142, and A1143
Sensitive Two-Wire Chopper-Stabilized
Unipolar Hall Effect Switches
Symbol
V
CC
I
CC(L)
B>B
OP
for A1140; B<B
RP
for A1141
B>B
OP
for A1142; B<B
RP
for A1143
B>B
OP
for A1141, A1143
B<B
RP
for A1140, A1142
V
RCC
= –18 V
I
CC
= I
CC(L)(max)
+ 3 mA; T
A
= 25°C
V
ZSUPPLY
= 28 V
Capacitance of the oscilloscope performing the
measurement = 20 pF
Test Conditions
Min.
3.5
2
5
12
–
28
–
–
–
C
BYPASS
= 0.01
μF
ELECTRICAL CHARACTERISTICS
over the operating voltage and temperature ranges, unless otherwise specified
Characteristic
Supply Voltage
1
Typ.
–
–
-–
-–
–
–
–
36
200
–
HIGH
Max.
24
5
6.9
17
–1.6
40
I
CC(L)(max)
+ 3 mA
–
–
25
–
Units
V
mA
mA
mA
mA
V
mA
mA/μs
kHz
μs
–
Supply Current
2
I
CC(H)
Reverse Supply Current
Supply Zener Clamp Voltage
Supply Zener Clamp Current
Output Slew Rate
3
Chopping Frequency
Power-On Time
3
Power-On State
5,6
1
V
CC
represents
2
Relative values
I
RCC
V
ZSUPPLY
I
ZSUPPLY
di/dt
f
C
t
on
POS
–
–
t < t
on
;
V
CC
slew rate > 25 mV/μs
the generated voltage between the VCC pin and the GND pin.
of B use the algebraic convention, where positive values indicate south magnetic polarity, and negative values indicate north magnetic
polarity; therefore greater B values indicate a stronger south polarity field (or a weaker north polarity field, if present).
3
Measured without bypass capacitor between VCC and GND. Use of a bypass capacitor results in slower current change.
3
Measured with and without bypass capacitor of 0.01
μF.
Adding a larger bypass capacitor causes longer Power-On Time.
5
POS is defined as true only with a V
CC
slew rate of 25 mV /
μs
or greater. Operation with a V
CC
slew rate less than 25 mV /
μs
can permanently harm
device performance.
6
POS is undefined for t > t or B
on
RP
< B < B
OP
.
MAGNETIC CHARACTERISTICS
over the operating voltage and temperature ranges, unless otherwise specified
Characteristic
Operate Point
Symbol
B
OP
Test Conditions
A1140, A1142 I
CC
= I
CC(L)
A1141, A1143 I
CC
= I
CC(H)
A1140, A1142 I
CC
= I
CC(H)
A1141, A1143 I
CC
= I
CC(L)
B
HYS
= B
OP
– B
RP
Min.
50
Typ.*
80
Max.
110
Units
G
Release Point
Hysteresis
B
RP
B
HYS
45
5
65
15
105
30
G
G
*Typical data are for initial design estimations only, and assume optimum manufacturing and application conditions, such as T
A
= 25°C and V
CC
= 12 V.
Performance may vary for individual units, within the specified maximum and minimum limits.
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
4
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
