Datasheet ATS137 Datasheet (AnaChip)

ATC

查询ATS137供应商

Single Hall Effect Switch

Features



- 3.5V to 20V DC operation voltage

- Temperature compensation

- Wide operating voltage range

- Open-Collector pre-driver

- 25mA maximum sinking output current.

- Reverse Polarity Protection

Applications



- VCD/DVD loader, CD/DVD ROM

- Cover detector

- Speed measurement

- Home appliances

- Home safety

Ordering Information



General Description



ATS137 is an switched Hall-Effect IC which is for
contactless switching applications. The device
includes an on-chip Hall voltage generator for
magnetic sensing, an amplifier that amplifies the
Hall voltage, a schmitt trigger to provide switching
hysteresis for noise rejection, and an open-collector
output. The bandgap regulator allows a wide
operating voltage range.
ATS137 is rated for operating temperature range
from -20°C to 85°C and voltage range from 3.5V to
20V.

ATS137X X X - X

-X

ATS137

Single Hall-effect Switch

Typical Circuit



Wafer Body

Blank or
A~Z : if necessary

to specify

Package Lead

P: SIP3
W: SOT23

L : Lead Free
Blank: Normal

Packing

Blank : Tube or Bulk
A :

Tape & Reel

Magnetic

Characteristics

A or B

3.5V ~20V

R

L

ATS

Vcc

DO

137

Digital Output

Vss

This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.

1/7

Rev.A5 Jul 14, 2004

ATC

Single Hall Effect Switch

Functional Block Diagrams



Vcc

1

Regulator

Pin Descriptions



Hall
plate

Amp

DO

3

2

Vss

ATS137

137

1

23

Name P/I/O Pin # Description

Vcc P 1 Positive Power Supply
Vss P 2 Ground

DO O 3 Digital Output

2

Top view

137

1

3

1 : Vcc

2 : Vss

3 : DO

Anachip Corp.

www.anachip.com.tw

Rev. A5 Jul 14, 2004

2/7

ATC

Single Hall Effect Switch

Absolute Maximum Ratings



Characteristics Symbol Values Unit

Supply voltage VCC 20 V
Reverse Vcc Polarity Voltage V
Magnetic flux density B Unlimited
Output OFF Voltage Vce 30 V
Output “on” current Continuous Ic 25 mA
Operating temperature Ta -20~+85
Storage temperature Ts -65~+150
Maximum Junction Temp. Tj 175
Package Power

Dissipation

Electrical Characteristics



Characteristic Symbol Test Conditions Min Typ Max Units

Supply voltage Vcc — 3.5 - 20 V

Output saturation voltage Vce(sat) Vcc=14V, Ic=20mA - 300 700 mV

Output leakage current Icex Vce=14V, Vcc=14V -

Supply current Icc Vcc=20V, Output Open - 5 10 mA

Output rise time tr

Output falling time tf

SIP-3L 400 mW
SOT23-3L

( at Ta=25oC )

(Ta=+ 25°C)

Vcc=14V, RL=820Ω,

CL=20pF

Vcc=14V, RL=820Ω,

CL=20pF

-20 V

RCC

Pd

200 mW

0.1

<

- 0.3 1.5 us

- 0.3 1.5 us

ATS137

°C
°C
°C

10 uA

Test Circuit



14V

Anachip Corp.

www.anachip.com.tw

DO

RL

RL=820 Ohm

CL=20 pF

CL

Test Circuit

Rev. A5 Jul 14, 2004

3/7

ATC

Single Hall Effect Switch

Magnetic Characteristics (Ta=25



(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

o

C)

ATS137

Vcc

B

hys

Turn on

B

op

magnetic flux

(Gauss)

Vce(sat)

Turn off

B

rp

Fig.1 Hall-effect switch

Output driver is open-collector topology and maximum sink current (I
shown as Fig.2.

3.5V ~20V

Vcc

R

L

ATS

137S

Vss

DO

I

sink

Vo

Digital Output

Magnet

electrical

) is 25mA. The illustrated circuit is

sink

S

Marking

side

Anachip Corp.

www.anachip.com.tw

Fig.2 Application circuit

Rev. A5 Jul 14, 2004

4/7

ATC

Single Hall Effect Switch

Application Information (Continued)



Vo will turn on(low) if the S magnetic flux larger than operation point (Bop), and turns off whenever the
magnetic flux is removed and lower than release point (Brp). The related waveforms are shown in Fig.3.

ATS137

magnetic flux (mT)

Bop

S

Marking side

Hall Effect switch

The major applications are for contactless switching and shown as follows:

VCD/DVD loader, CD/DVD ROM: Detect if the tray is opened or closed

-

Cover detector (open/close): Cellular phone cover detector, Refrigerator door detector, Microwave oven

-

door sensor… etc

Home safety: instead of reed relay to detect the situation of door/window.

-

Due to contactless and without mechanical contact point, its reliability and life cycle are much longer than

-

reed relay. In addition, its switching speed is much faster than mechanical devices.

Brp

Vo

Vcc

Vce(sat)

Fig.3 Vo and magnetic flux variety

t

t

Anachip Corp.

www.anachip.com.tw

Rev. A5 Jul 14, 2004

5/7

ATC

Single Hall Effect Switch

Marking Information



(1) SOT23 (2) SIP3

(Top View)

XX YM X

ID code
A~Z: Non-Lead Free
a~z: Lead Free

JA: ATS137

Date code
Y : Year
M : Month (A~L)

Package Information



(1)Package Type: SIP-3L

0.51mm
NOM

(Top View)

137

YWW X

ATS137

ID code
A~Z: Non-Lead Free
a~z : Lead Free

Date code
Y : Year
WW : Nth week

2.10mm

1.55mm

Package Dimension

4.17mm

4.04mm

Anachip Corp.

www.anachip.com.tw

Rev. A5 Jul 14, 2004

BRANDED
SURFACE

Active Area Depth

1.57mm

1.47mm

45

º

3.10mm

2.97mm

6/7

123

Sensor Location

45

º

0.38mm

0.7mm

0.41mm

1.82
mm

3

2

1

15.50mm

13.00mm

0.41mm

1.27mm

ATC

Single Hall Effect Switch

Package Information (Continued)



(2)Package Type: SOT23-3L

2

( Sensing point )

0.8mm

1

1.45mm

SEATING PLANE

Symbol

3

C0.10

3X

Dimensions In Millimeters Dimensions In Inches

Min. Nom. Max. Min. Nom. Max.

A 1.05 - 1.35
A1 0.05 - 0.15 0.002 - 0.006
A2 1.00 1.10 1.20 0.039 0.043 0.047

b 0.25 - 0.50 0.010 - 0.020

C 0.08 - 0.20 0.003 - 0.008

D 2.70 2.90 3.00 0.106 0.114 0.118

E 1.50 1.60 1.70 0.059 0.063 0.067

HE 2.60 2.80 3.00 0.102 0.110 0.118

L 0.30 - 0.55 0.012 - 0.022
L1 0.50 0.60 0.70 0.020 0.024 0.028

e 1.80 1.90 2.00 0.071 0.075 0.079
e1 0.85 0.95 1.05 0.033 0.037 0.041

θ 0

o

5

θ1 3o 5
θ2 6o 8

D

e1

e

£c1(4x)

b(3x)

£c2(4x)

0.041 - 0.053

o

10o 0

o

7

o

10o 6

o

3

E

HE

SEE VIEW C

A

A2

A1

o

5

o

5

o

8

o

10o

o

7

o

10o

ATS137

L

L1

VIEW C

o

GAUGE PLANE

£c

Anachip Corp.

www.anachip.com.tw

Rev. A5 Jul 14, 2004

7/7