Sharp LT280A Datasheet

Hall IC

LT280A

■ 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 (2.9X1.5X1.1mm)

¡Wide operation temperature range obtained by GaAs Hall

device (-20 to +125˚C)

¡Long life time due to noncontact-type

■ Applications

¡FDD
¡HDD
¡Water meter
¡Car stereo
¡Microswitch, etc.

■ Absolute Maximum Ratings (T

Supply voltage

Parameter

Output voltage
Output current
Power dissipation
Operating temperature
Storage temperature

Soldering temperature

*1 Soldering time : within 10 second

*1

Symbol

V

CC

V

OUT

I

O

P

D

T

opr

-20 to +125

T

stg

-55 to +150

T

sol

s

Rating

6.5

6.5
5

100

260

a

=25˚C)

Unit

V
V

mA

mW

˚C
˚C
˚C

LT280A

GaAs Hall IC for Noncontact Switch

(Unidirectional magnetic field-type)

■ Outline Dimensions

2.7±0.3

0.40.4

1.9

2.9±0.2

Hall device center line
X : +0.05±0.23mm against package center
Y : -0.05±0.1mm against package lead center between
No.2 and No.3 terminals
Z : 0.81±0.15mm from package surface

+0.10

-0.06

0.16

*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.

Y

1

2

1.5±0.2

0.6 0.6

As for dimensions of tape-packaged products, refer to page 44 .

■ Operating Explanation

<Unidirectional magnetic field-type>

Output voltage

BRP0BOP+B

Magnetic flux density

(Unit : mm)

0.6

4

0.850.95

SZ

3

X

0.4

4-R0.2

Terminal connections

0.30.8

Hall

device

H

+0.2

-0.1

1.1

(0to0.15)

REG

+

-

1 : V

CC

2 : V

OUT

3 : Don't use.
4 : GND

2.9±0.2

■ Electrical Characteristics

Parameter
Operating magnetic flux density
Hysteresis breadth

Operating voltage
Supply current
Low level output voltage
Output leakage current
Operating point temperature drift

In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices
shown in catalogs, data books, etc. Contact SHARP in order to obtain the latest device spcification sheets before using any SHARP device.

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

=4.7kΩ

V

CC

=3V, B=<10mT

I

O

=4mA, B>=30mT

V

CC

=3V, VOO=3V, B=<10mT

V

CC

=3V, Ta=-20˚C to +80˚C

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

(Ta=25˚C)

Unit

mT
mT
mT

V

mA

V

µA

mT

Hall IC

LT280A

Fig. 1 Operating Magnetic Flux Density vs.

Supply Voltage

TA=25˚C

(mT)

24

20

16

12

8

4

Operating magnetic flux density B

0

0846210

B

OP

B

RP

Supply voltage VCC (V)

Fig. 2 Operating Magnetic Flux Density vs.

Ambient Temperature

VCC=3V

(mT)

24

20

16

12

8

4

Operating magnetic flux density B

0

Ambient temperature Ta (˚C)

B

B

OP

RP

80040-40 120

Fig. 3 Supply Current vs. Supply Voltage Fig. 4 Supply Current vs. Ambient

Temperature

10

8

6

B=<10mT

a=25˚C

T

10

8

(mA)

CC

6

VCC=3V

B=<10mT

4

Supply current ICC (mA)

2

0

08246 10

Supply voltage VCC (V)

Fig. 5 Low Level Output Voltage vs.

Output Current

0.5
VCC= V

B>=30mT

(V)

0.4

a

=25˚C

T

OL

0.3

0.2

0.1

Low level output voltage V

0

04123 5

Output current IO (mA)

4

Supply current I

2

0

-40 12004080
Ambient temperature Ta (˚C)

Fig. 6 Low Level Output Voltage vs.

Ambient Temperature

0.5
VCC=3V

I

O

(V)

OL

Low level output voltage V

=4mA

0.4

B>=30mT

0.3

0.2

0.1

0

Ambient temperature Ta (˚C)

80-40 0 40 120