Single Hall Effect Switch

ATS137

Anachip Corp.

www.anachip.com.tw

Rev. A5 Jul 14, 2004

4/7

ATC

(1mT=10Gauss)

A grade

Parameter

Symbol

Min.

Typ.

Max.

Unit

Operate Point

Bop

-

-

100

Gauss

Release point

Brp

10

-

-

Gauss

Hysteresis

Bhys

-

80

-

Gauss

B grade

Parameter

Symbol

Min.

Typ.

Max.

Unit

Operate Point

Bop

-

-

130

Gauss

Release point

Brp

10

-

-

Gauss

Hysteresis

Bhys

-

80

-

Gauss

Application Information

-Operating principle

ATS137 is a three pins Hall Effect switch IC which can turn magnetic flux variety to digital output signal. In

other words, it is an interface from magnetic system to electrical one by Hall effect. The illustrations are shown

in Fig.1.

Vo

Vce(sat)

Vcc

magnetic flux

(Gauss)

Turn on

Turn off

hys

B

op

B

rp

B

Magnet

electrical

S

Marking

side

Fig.1 Hall-effect switch

shown as Fig.2.

ATS

137S

3.5V ~20V

Digital Output

Vcc

DO

Vss

Vo

L

R

sink

I

Fig.2 Application circuit