3
A3241-DS, Rev. 2
Worcester, Massachusetts 01615-0036 (508) 853-5000
115 Northeast Cutoff, Box 15036
www.allegromicro.com
Allegro MicroSystems, Inc.
Chopper-Stabilized Unipolar Hall Effect Switches
A3241 and A3242
OPERATING CHARACTERISTICS
valid over full operating voltage and ambient temperature ranges, unless otherwise noted
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Electrical Characteristics
Supply Voltage1
VCC
Operating, TJ < 165°C
3.6
–
24
V
Output Leakage Current
IOUTOFF
VOUT = 24 V, B < BRP
––
10
μA
Output On Voltage
VOUT(SAT)
IOUT = 20 mA, B > BOP
–
500
mV
Output Current Limit
IOM
B > BOP
30
–
60
mA
Power-On Time
tPO
VCC > VCC(MIN)
––
50
μs
Chopping Frequency
fc
–
200
–
kHz
Output Rise Time2
tr
RLOAD = 820 Ω, CS = 20 pF
–
1
μs
Output Fall Time2
tf
RLOAD = 820 Ω, CS = 20 pF
–
1
μs
Supply Current
ICCON
B > BOP
–
1.5
3.5
mA
ICCOFF
B < BRP
–
1.5
3.5
mA
Reverse Battery Current
IRCC
VRCC = –18 V
–
–2
mA
Supply Zener Clamp Voltage
VZSupply
ICC = 6.5 mA; TA = 25°C
28
–
V
Supply Zener Current3
IZSupply
VS = 28 V
–
6.5
mA
Magnetic Characteristics4
Operate Point
BOP
A3241
50
95
135
G
A3242
120
150
200
G
Release Point
BRP
A3241
40
70
110
G
A3242
110
125
190
G
Hysteresis
BHYS
A3241
BOP – BRP
10
25
42
G
A3242
10
25
40
G
1 Maximum voltage must be adjusted for power dissipation and junction temperature, see Power Derating section.
2 CS = oscilloscope probe capacitance.
3 Maximum current limit is equal to the maximum ICC(MAX) + 3 mA.
4 Magnetic ux density, B, is indicated as a negative value for north-polarity magnetic elds, and as a positive value for south-polarity magnetic elds.
This so-called algebraic convention supports arithmetic comparison of north and south polarity values, where the relative strength of the eld is indicated
by the absolute value of B, and the sign indicates the polarity of the eld (for example, a –100 G eld and a 100 G eld have equivalent strength, but
opposite polarity).
DEVICE QUALIFICATION PROGRAM
Contact Allegro for information.
EMC (Electromagnetic Compatibility) REQUIREMENTS
Contact Allegro for information.
