A1148 Allegro MicroSystems, A1148 Datasheet - Page 3

no-image

A1148

Manufacturer Part Number
A1148
Description
(A1147 / A1148) Low Current Ultrasensitive Two-Wire Chopper-Stabilized Unipolar Hall Effect Switches
Manufacturer
Allegro MicroSystems
Datasheet
A1147
A1148
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
Chopper-Stabilized Unipolar Hall Effect Switches
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
B > B
B > B
V
I
V
Capacitance of the oscilloscope performing
the measurement = 20 pF
C
t < t
A1147 I
A1148 I
A1147 I
A1148 I
B
CC
RCC
ZSUPPLY
BYPASS
HYS
= I
on
OP
OP
= B
;
= –18 V
CCL(max)
V
= 0.01 μF
CC
for A1147; B < B
for A1148; B < B
OP
CC
CC
CC
CC
= 28 V
slew rate > 25 mV/μs
Low Current Ultrasensitive Two-Wire
– B
= I
= I
= I
= I
Test Conditions
Test Conditions
+ 3 mA; T
CCL
CCH
CCH
CCL
RP
A
RP
RP
= 25°C
for A1148
for A1147
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 (508) 853-5000
www.allegromicro.com
3.5
12
28
20
10
2
5
HIGH
Typ.*
Typ.
200
36
37
22
15
A
= 25°C and V
Max.
Max.
–1.6
24
17
40
25
80
60
30
5
8
CC
mA/μs
Units
Units
kHz
mA
mA
mA
= 12 V.
mA
μs
V
V
G
G
G
3

Related parts for A1148