A1225, A1227
and A1229
Hall Effect Latch for High Temperature Operation
ELECTRICAL CHARACTERISTICS Valid at TA = –40°C to 150°C, CBYPASS = 0.1 μF, VCC = 12 V; unless otherwise noted
Characteristics
Electrical Characteristics
Supply Voltage
Symbol
Test Conditions
Min.
Typ.1
Max.
Unit2
VCC
ICC
Operating; TJ ≤ 165°C
3.8
–
24
6
V
mA
mA
V
B < BRP (Output off)
B > BOP (Output on)
ICC = 9 mA, TA = 25°C
VRCC = –28 V, TA = 25°C
–
–
Supply Current
–
6
Supply Zener Voltage
Reverse Battery Current
Power-On Time3
VZ(sup)
IZ(sup)
tPO
28
– 5
–
–
–
–
–
mA
μs
–
12
–
Power-On State
POS
fchop
B < BOP
–
HIGH
400
–
Chopping Frequency
Output Stage Characteristics
Output Saturation Voltage
Output Leakage Current
Output Rise Time3,4
–
–
kHz
VOUT(sat) IOUT = 20 mA
–
–
175
< 1
200
200
–
400
10
mV
μA
ns
ns
V
IOFF
VOUT = 24 V, B < BRP
tr
tf
RL= 820 Ω, CL= 20 pF
RL= 820 Ω, CL= 20 pF
IOUT = 3 mA, TA = 25°C
–
2000
2000
–
Output Fall Time3,4
–
Output Zener Voltage
Magnetic Characteristics
VZ(out)
30
TA = 25°C
A1225
170
140
50
–
–
–
–
–
–
–
–
–
–
–
–
–
–
270
300
150
175
180
200
–170
–140
–50
–50
–100
–80
540
600
300
350
360
400
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
Over operating temperature range
TA = 25°C
Operate Point
BOP
A1227
A1229
A1225
A1227
A1229
A1225
A1227
A1229
Over operating temperature range
TA = 25°C
50
100
80
Over operating temperature range
TA = 25°C
–270
–300
–150
–175
–180
–200
340
280
100
100
200
160
Over operating temperature range
TA = 25°C
Release Point
BRP
Over operating temperature range
TA = 25°C
Over operating temperature range
TA = 25°C
Over operating temperature range
TA = 25°C
Hysteresis (BOP – BRP
)
BHYS
Over operating temperature range
TA = 25°C
–
–
–
Over operating temperature range
1Typical data are at TA = 25°C and VCC = 12 V, and are for design estimations only.
21 G (gauss) = 0.1 mT (millitesla).
3Minimum and maximum specifications verified by bench characterization and not guaranteed by Allegro final test.
4CL = oscilloscope probe capacitance.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
3
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
SANKEN [ SANKEN ELECTRIC ]
