A1146 Allegro MicroSystems, A1146 Datasheet - Page 3

• Manufacturer Part Number: A1146
• Description: (A1145 / A1146) Ultrasensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches
• Manufacturer: Allegro MicroSystems

A1145
A1146
ELECTRICAL CHARACTERISTICS
Supply Voltage
Supply Current
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
4
5
6
device performance.
7
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.
V
Relative values of B use the algebraic convention, where positive values indicate south magnetic polarity, and negative values indicate north magnetic
I
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
ZSUPPLY(max)
CC
represents the generated voltage between the VCC pin and the GND pin.
Characteristic
Characteristic
and
= I
CCL(max)
2
1
5
6,7
4
+ 3 mA.
on
or B
3
RP
< B < B
CC
V
Symbol
I
Symbol
slew rate of 25 mV / μs or greater. Operation with a V
ZSUPPLY
ZSUPPLY
B
POS
I
di/dt
V
I
B
I
B
CCH
OP
CCL
over the operating voltage and temperature ranges, unless otherwise specified
RCC
t
f
HYS
on
CC
OP
C
RP
.
over the operating voltage and temperature ranges, unless otherwise specified
Ultrasensitive Two-Wire Chopper-Stabilized
B > B
B > B
V
I
V
Capacitance of the oscilloscope performing
the measurement = 20 pF
C
t < t
A1145 I
A1146 I
A1145 I
A1146 I
B
CC
RCC
ZSUPPLY
BYPASS
HYS
= I
on
OP
OP
= B
;
= –18 V
CCL(max)
V
= 0.01 μF
CC
for A1145; B < B
for A1146; B < B
OP
CC
CC
CC
CC
= 28 V
slew rate > 25 mV/μs
– B
= I
= I
= I
= I
Test Conditions
Test Conditions
+ 3 mA; T
CCL
CCH
CCH
CCL
RP
A
RP
RP
= 25°C
Unipolar Hall Effect Switches
for A1146
for A1145
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
20
10
5
–
–
–
–
–
5
–
HIGH
Typ.*
Typ.
200
36
37
22
15
–
–
–
–
–
–
–
A
= 25°C and V
Max.
Max.
–1.6
6.9
9.9
24
17
40
25
60
55
30
–
–
–
CC
mA/μs
Units
Units
kHz
mA
mA
mA
= 12 V.
mA
μs
V
V
G
G
G
–
3