A3245 ALLEGRO [Allegro MicroSystems], A3245 Datasheet - Page 3

• Manufacturer Part Number: A3245
• Description: Chopper-Stabilized Omnipolar Hall-Effect Switches
• Manufacturer: ALLEGRO [Allegro MicroSystems]

A3245-DS, Rev. 1
OPERATING CHARACTERISTICS valid over full operating voltage and ambient temperature ranges, unless otherwise noted
Electrical Characteristics
Supply Voltage
Output Leakage Current
Output On Voltage
Output Current Limit
Power-On Time
Chopping Frequency
Output Rise Time
Output Fall Time
Supply Current
Reverse Battery Current
Supply Zener Clamp Voltage
Supply Zener Current
Magnetic Characteristics
Operate Point
Release Point
Hysteresis
1
2
3
4
This so-called algebraic convention supports arithmetic comparison of north and south polarity values, where the relative strength of the fi eld is indicated
by the absolute value of B, and the sign indicates the polarity of the fi eld (for example, a –100 G fi eld and a 100 G fi eld have equivalent strength, but
opposite polarity).
Maximum voltage must be adjusted for power dissipation and junction temperature, see Power Derating section.
C
Maximum current limit is equal to the maximum I
Magnetic fl ux density, B, is indicated as a negative value for north-polarity magnetic fi elds, and as a positive value for south-polarity magnetic fi elds.
S
= oscilloscope probe capacitance.
Characteristic
1
2
2
3
4
Chopper-Stabilized Omnipolar Hall Effect Switches
V
Symbol
V
I
I
OUTOFF
OUT(SAT)
I
I
ZSupply
EMC (Electromagnetic Compatibility) REQUIREMENTS
CCOFF
B
B
B
B
B
ZSupply
CCON
I
V
I
t
RCC
OM
OPS
OPN
RPN
PO
RPS
HYS
f
t
CC
t
c
r
f
CC(MAX)
DEVICE QUALIFICATION PROGRAM
Operating, T
V
I
B > B
V
R
R
B > B
B < B
V
I
V
South pole adjacent to branded face of device
North pole adjacent to branded face of device
South pole adjacent to branded face of device
North pole adjacent to branded face of device
|B
OUT
CC
OUT
CC
RCC
S
LOAD
LOAD
OPX
= 28 V
Contact Allegro for information.
Contact Allegro for information.
= 6.5 mA; T
+ 3 mA.
> V
= 20 mA, B > B
= 24 V, B < B
OP
OP
RP
= –18 V
– B
= 820 Ω, C
= 820 Ω, C
CC(MIN)
RPX
J
|
A3245
< 165°C
A
= 25°C
Test Conditions
S
S
RP
OP
= 20 pF
= 20 pF
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
Min.
–55
–50
3.6
30
28
15
–
–
–
–
–
–
–
–
–
–
5
5
Typ.
200
–38
–20
1.5
1.5
38
20
18
–
–
–
–
–
–
–
–
–
–
Max.
500
–15
3.5
3.5
6.5
24
10
60
50
–2
55
50
–5
30
–
1
1
–
Units
kHz
mV
mA
mA
mA
mA
mA
μA
μs
μs
μs
G
G
G
G
G
V
V
3