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.

s Features

¡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

s Applications

¡FDD

¡HDD

¡Water meter

¡Car stereo

¡Microswitch, etc.

s Outline Dimensions

(Unit : mm)

LT251A

LT251A

Hall IC

GaAs Hall IC for Noncontact Swich

(Unidirectional magnetic field-type)

s Operating Explanation

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

2.7±0.3

1.5±0.2

1

2

4

3

4-R0.2

SZ

0.6

0.6

3 : Don't use.

4 : GND

+

-

H

REG

Y

X

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

*No.3 terminal and the section of leads (both sides

of package in X direction) are connected with the

terminal of internal IC. Be careful in connecting other circuits.

Terminal connections

Hall

device

+B

Magnetic flux density

<Unidirectional magnetic field-type>

*1 Soldering time : within 10 seconds

s Absolute Maximum Ratings

Supply voltage

Output voltage

Output current

Power dissipation

Operating temperature

Storage temperature

Symbol

Rating

18

18

5

100

-20 to +125

-55 to +150

260

Unit

V

V

mA

mW

˚C

˚C

˚C

Parameter

s Electrical Characteristics

Operating magnetic flux density

Hysteresis breadth

Operating voltage

Supply current

Low level output voltage

High level output voltage

Output short circuit current

Operating point temperature drift

Symbol

Conditions

µA, B=<10mT

MIN.

11

10

1

4.5

-

-

13.9

-1.55

-

-

TYP.

-

-

-

-

-

-

-

-

2.0

2.5

MAX.

30

29

5

16

10.5

0.4

-

-0.80

4.5

8.0

Unit

mT

mT

mT

V

mA

V

V

mA

mT

mT

Parameter