Chopper-Stabilized, Precision Hall-Effect Switch
A3340
3
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Operating Characteristics, valid over T
A
, unless otherwise noted
Characteristic
Symbol
Test Conditions
Min. Typ.
1
Max. Units
Electrical Characteristics
Supply Voltage Range
2
V
CC
Operating, T
J
< 165癈
4.2 24 V
Output Leakage Current
I
OFF
V
OUT
= 24 V, B > B
OP
10 糀
Output Saturation Voltage
V
OUT(SAT)
I
OUT
= 20 mA, B < B
RP
270 500 mV
Output Current Limit
I
OM
B < B
RP
30 60 mA
Power-On Time
t
PO
V
CC
> 4.2 V
50 約
Chopping Frequency
f
C
340 kHz
Output Rise Time
t
r
R
LOAD
= 820 ? C
LOAD
= 20 pF
0.2 2.0 約
Output Fall Time
t
f
R
LOAD
= 820 ? C
LOAD
= 20 pF
0.1 2.0 約
Supply Current
I
CC
B < B
RP
, V
CC
= 12 V
3.0 6.0 mA
B > B
OP
, V
CC
= 12 V
4.0 6.0 mA
Reverse Battery Current
I
RCC
V
RCC
= 30 V
-5.0 mA
Zener Voltage
V
ZD
V
Z
+ V
D
, I
CC
= 15 mA, T
A
= 25癈
28 32 37 V
Zener Impedance
Z
ZD
Z
Z
+ Z
D
, I
CC
= 15 mA, T
A
= 25癈
50
?/DIV>
Magnetic Characteristics
3
Operate Point
4
B
OP
35 50 G
Release Point
4
B
RP
5.0 25
G
Hysteresis
B
hys
B
OP
B
RP
6
G
1
Typical data are for initial design estimations only, and assume optimum manufacturing and application conditions, such as T
A
= 25癈 and V
CC
=
12 V. Performance may vary for individual units, within the specified maximum and minimum limits.
2
Maximum voltage must be adjusted for power dissipation and junction temperature.
3
1 G (gauss) = 0.1 mT (millitesla).
4
B
OP
= operate point (output turns off); B
RP
= release point (output turns on).
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