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Hall IC
s
Outline Dimensions
s
Operating Explanation
(Unit
:
mm
)
LT280A
*1 Soldering time : within 10 second
s
s
Absolute Maximum Ratings
(T
a
=25C)
Supply voltage
Output voltage
Output current
Power dissipation
Operating temperature
Storage temperature
Soldering temperature
*1
Symbol
V
CC
V
OUT
I
O
P
D
T
opr
T
stg
T
sol
Rating
6.5
6.5
5
100
-20 to +125
-55 to +150
260
Unit
V
V
mA
mW
C
C
C
Parameter
s
Electrical Characteristics
(T
a
=25C)
Operating magnetic flux density
Hysteresis breadth
Operating voltage
Supply current
Low level output voltage
Output leakage current
Operating point temperature drift
Symbol
B
OP
B
RP
B
H
V
CC
I
CC
V
OL
I
OH
B
OP
Condition
V
CC
=3V
V
OO
=3V
R
L
=4.7k
V
CC
=3V, B=<10mT
I
O
=4mA, B>=30mT
V
CC
=3V, V
OO
=3V, B=<10mT
V
CC
=3V, T
a
=-20C to +80C
MIN.
11.0
10.0
1.0
2.7
-
-
-
-
TYP.
-
-
-
-
3.5
-
-
2.5
MAX.
30.0
29.0
6.0
6.0
7.0
0.4
10
8.0
Unit
mT
mT
mT
V
mA
V
A
mT
Parameter
+
-
H
REG
Terminal connections
Hall
device
2.70.3
1.50.2
1
2
4
3
0.6
0.4
0.4
0.4
1.9
2.90.2
0.85
0.95
2.90.2
4-R0.2
S
Z
0.6
0.6
0.3
0.8
(0to0.15)
0.16
+0.10
-0.06
1.1
+0.2
-0.1
1 : V
CC
2 : V
OUT
3 : Don't use.
4 : GND
Y
X
Hall device center line
X : +0.050.23mm against package center
Y : -0.050.1mm against package lead center between
No.2 and No.3 terminals
Z : 0.810.15mm from package surface
*No.3 terminal and the section of lead (both sides
of package in X direction) are connected with the
terminal of internal IC. Be careful in connecting other circuits.
B
RP
0
B
OP
+B
Magnetic flux density
<Unidirectional magnetic field-type>
Output voltage
As for dimensions of tape-packaged products, refer to page 44 .
LT280A
GaAs Hall IC for Noncontact Switch
(Unidirectional magnetic field-type)
s
Applications
FDD
HDD
Water meter
Car stereo
Microswitch, etc.
s
Features
Suitable for portable equipment due to 3V operation
Operation by small magnet due to high sensitivity
Operating point<30mT
Combining a GaAs Hall device and an IC in a compact
package (2.9
X
1.5
X
1.1mm)
Wide operation temperature range obtained by GaAs Hall
device (-20 to +125C)
Long life time due to noncontact-type
Hall IC
LT280A
Fig. 1 Operating Magnetic Flux Density vs.
Supply Voltage
Fig. 3 Supply Current vs. Supply Voltage
Fig. 4 Supply Current vs. Ambient
Temperature
Fig. 5 Low Level Output Voltage vs.
Output Current
Fig. 6 Low Level Output Voltage vs.
Ambient Temperature
Fig. 2 Operating Magnetic Flux Density vs.
Ambient Temperature
V
CC
= V
B>=30mT
T
a
=25C
0
0
4
1
2
3
5
0.5
0.4
0.3
0.2
0.1
Low level output voltage V
OL
(V)
Output current I
O
(mA)
B=<10mT
T
a
=25C
0
0
8
2
4
6
10
10
8
6
4
2
Supply current I
CC
(mA)
Supply voltage V
CC
(V)
T
A
=25C
B
OP
B
RP
0
0
8
4
6
2
10
20
16
8
4
24
12
Operating magnetic flux density B
(mT)
Supply voltage V
CC
(V)
V
CC
=3V
B
OP
B
RP
0
80
0
40
-40
120
20
16
8
4
24
12
Operating magnetic flux density B
(mT)
Ambient temperature T
a
(C)
V
CC
=3V
B=<10mT
0
-40
120
0
40
80
10
8
6
4
2
Supply current I
CC
(mA)
Ambient temperature T
a
(C)
V
CC
=3V
I
O
=4mA
B>=30mT
0
80
-40
0
40
120
0.5
0.4
0.3
0.2
0.1
Low level output voltage V
OL
(V)
Ambient temperature T
a
(C)
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