a1140euati-t Allegro MicroSystems, Inc., a1140euati-t Datasheet - Page 4

• Manufacturer Part Number: a1140euati-t
• Description: Sensitive Two-wire Chopper-stabilized Unipolar Hall Effect Switches
• Manufacturer: Allegro MicroSystems, Inc.

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