SM3600AP

SEIKO NPC CORPORATION - 5

Magnetic Characteristics

Parameter

Symbol

Conditions

MIN

TYP

MAX

Unit

Magnetic sensitivity

OUT pin

After auto-bias setting,

3.0

4.0

-

V/Oe

0.037

0.050

-

V/(A/m)

OUT pin

Width of magnetic material detected by

sensor, Detection range of −9.54dB (1/3)

to maximum amplitude, Gap=0.5mm

3.0

3.5

-

mm

OUT pin

Clearance between magnetic materials

detected by sensor, Detection range of

−9.54dB (1/3) to maximum amplitude,

Gap=0.5mm

-

0.8

1.2

mm

Surface magnetic flux density

Magnetic flux density at package surface

-

-

mT

*Typical value

*1. Magnetic detection width measurement method

When gap (package surface to magnetic pattern separation) = 0.5mm

*2. Spatial resolution measurement method

When gap (package surface to magnetic pattern separation) = 0.5mm

Note: Magnetism units

Parameter

SI Units

CGS Units

Note

Name

Symbol

other

Name

Symbol

Magnetic flux

Weber

Wb

V·s

Maxwell

Mx

Mgnetic flux density

Tesla

T

Gauss

G

Magnetic field strength

-

-

A/m

Oersted

Oe

The magnetic field strength is expressed in [Oe] or [A/m] units, and the magnetic flux density per unit surface area (flux density of magnetic field lines)

is expressed in [G] or [T] units.

There is no proportional relationship between magnetic field strength and flux density between in-vacuo and in magnetic materials due to the difference in

the definition of the units, but for normal measurement in the atmosphere (or vacuo), 1 [Oe] can be converted as approximately 1 [G].

=(count number of pulse -1)×0.1mm

SM3600AP

1.0mm

2.0mm

2.0mm

0.1mm

magnetic pattern

flow direction

SM3600AP

1.0mm

magnetic pattern

flow direction

R

MG