HAL740

DATA SHEET

18

Nov. 30, 2009; DSH000029_002EN

Micronas

4.2. HAL740

The HAL740 consists of two independent unipolar

switches (see Fig. 4–5) with complementary magnetic

characteristics controlling two independent open-drain

outputs. The Hall plates of the two switches are

spaced 2.35 mm apart.

The S1-Output turns low with the magnetic north pole

on the branded side of the package and turns high if

the magnetic field is removed. It does not respond to

the magnetic south pole on the branded side.

The S2-Output turns low with the magnetic south pole

on the branded side of the package and turns high if

the magnetic field is removed. It does not respond to

the magnetic south pole on the branded side.

Magnetic Features

– two independent Hall-switches

– distance of Hall plates: 2.35 mm

– temperature coefficient of

−2000 ppm/K in all mag-

netic characteristics

– operation with static magnetic fields and dynamic

magnetic fields up to 10 kHz

Applications

The HAL740 is the ideal sensor for applications which

require both magnetic polarities, such as:

– position and direction detection, or

– position and end point detection with either mag-

netic pole (omnipolar switch).

Fig. 4–5: Definition of magnetic switching points for

the HAL740

Magnetic Characteristics

only differ in sign. For S1 the sign is negative, for S2 positive. Positive flux density values refer to the magnetic south

pole at the branded side of the package.

0

Output Voltage

B

Parameter

Magnetic Offset

Unit

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

−40 °C 8.5

12.3

16.0

5.0

8.8

12.5

2.0

−

5.5

−

10.6

−

mT

25

°C 7.0

11.5

16.0

3.5

8.0

12.5

2.0

−

6.0

−

9.8

−

mT

100

°C 5.5

10.8

16.0

2.0

7.0

12.5

1.5

−

6.5

−

8.9

−

mT

140

°C 4.6

10.4

16.0

1.1

6.8

12.5

1.0

−

7.0

−

8.6

−

mT