Anachip ATS137B-W-A Single hall effect switch Datasheet

ATC
ATS137
Single Hall Effect Switch
Features
General Description
- 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
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.
Applications
- VCD/DVD loader, CD/DVD ROM
- Cover detector
- Speed measurement
- Home appliances
- Home safety
Ordering Information
ATS137 X - X X X - X
Single Hall-effect Switch
Wafer Body
Package
Lead
Packing
Blank or
A~Z : if necessary
to specify
P: SIP3
W: SOT23
L : Lead Free
Blank: Normal
Blank : Tube or Bulk
A : Tape & Reel
Magnetic
Characteristics
A or B
Typical Circuit
3.5V ~20V
RL
Vcc
ATS
137
DO
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.
Rev.A5 Jul 14, 2004
1/7
ATC
ATS137
Single Hall Effect Switch
Functional Block Diagrams
Vcc
1
Regulator
Hall
plate
3 DO
Amp
2
Vss
Pin Descriptions
2
137
Top view
137
1 : Vcc
1
3
2 : Vss
3 : DO
1
2
3
Name
P/I/O
Pin #
Vcc
Vss
DO
P
P
O
1
2
3
Anachip Corp.
www.anachip.com.tw
Description
Positive Power Supply
Ground
Digital Output
Rev. A5 Jul 14, 2004
2/7
ATC
ATS137
Single Hall Effect Switch
Absolute Maximum Ratings
( at Ta=25oC )
Characteristics
Symbol
Values
Unit
VCC
VRCC
B
Vce
Ic
Ta
Ts
Tj
20
-20
V
V
Supply voltage
Reverse Vcc Polarity Voltage
Magnetic flux density
Output OFF Voltage
Output “on” current
Continuous
Operating temperature
Storage temperature
Maximum Junction Temp.
SIP-3L
Package Power
Dissipation
SOT23-3L
Electrical Characteristics
Characteristic
Supply voltage
Output saturation voltage
Output leakage current
Supply current
Symbol
Unlimited
30
25
-20~+85
-65~+150
175
400
200
Pd
V
mA
°C
°C
°C
mW
mW
(Ta=+ 25°C)
Test Conditions
Min
Vcc
—
3.5
-
20
V
Vce(sat)
Icex
Icc
Vcc=14V, Ic=20mA
Vce=14V, Vcc=14V
Vcc=20V, Output Open
Vcc=14V, RL=820Ω,
CL=20pF
Vcc=14V, RL=820Ω,
CL=20pF
-
300
<0.1
5
700
10
10
mV
uA
mA
-
0.3
1.5
us
-
0.3
1.5
us
Output rise time
tr
Output falling time
tf
Typ
Max
Units
Test Circuit
14V
DO
RL
RL=820 Ohm
CL=20 pF
CL
Test Circuit
Anachip Corp.
www.anachip.com.tw
Rev. A5 Jul 14, 2004
3/7
ATC
ATS137
Single Hall Effect Switch
Magnetic Characteristics (Ta=25oC)
(1mT=10Gauss)
A grade
Parameter
Operate Point
Release point
Hysteresis
B grade
Symbol
Bop
Brp
Bhys
Min.
10
-
Typ.
80
Max.
100
-
Unit
Gauss
Gauss
Gauss
Parameter
Operate Point
Release point
Hysteresis
Symbol
Bop
Brp
Bhys
Min.
10
-
Typ.
80
Max.
130
-
Unit
Gauss
Gauss
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
Vcc
Magnet
Bhys
Turn on
Turn off
Vce(sat)
Brp
magnetic flux
(Gauss)
Bop
S
Marking
side
electrical
Fig.1 Hall-effect switch
Output driver is open-collector topology and maximum sink current (Isink) is 25mA. The illustrated circuit is
shown as Fig.2.
3.5V ~20V
Vcc
RL
Vo
DO
ATS
137S
Digital Output
Isink
Vss
Fig.2 Application circuit
Anachip Corp.
www.anachip.com.tw
Rev. A5 Jul 14, 2004
4/7
ATC
ATS137
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.
magnetic flux (mT)
Bop
Brp
S
Marking side
t
Vo
Hall Effect switch
Vcc
Vce(sat)
t
Fig.3 Vo and magnetic flux variety
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.
Anachip Corp.
www.anachip.com.tw
Rev. A5 Jul 14, 2004
5/7
ATC
ATS137
Single Hall Effect Switch
Marking Information
(1) SOT23
(2) SIP3
(Top View)
XX YM X
(Top View)
ID code
A~Z: Non-Lead Free
a~z: Lead Free
ID code
A~Z: Non-Lead Free
a~z : Lead Free
137
YWW X
JA: ATS137
Date code
Y : Year
M : Month (A~L)
Date code
Y : Year
WW : Nth week
Package Information
(1)Package Type: SIP-3L
0.51mm
NOM
2.10mm
1.55mm
BRANDED
SURFACE
1
2
3
Sensor Location
Active Area Depth
Package Dimension
45º
0.38mm
0.7mm
1.57mm
1.47mm
0.41mm
0.41mm
3
1.27mm
4.17mm
4.04mm
2
1
45º
3.10mm
2.97mm
Anachip Corp.
www.anachip.com.tw
1.82
mm
15.50mm
13.00mm
Rev. A5 Jul 14, 2004
6/7
ATC
ATS137
Single Hall Effect Switch
Package Information (Continued)
(2)Package Type: SOT23-3L
D
2
HE
E
( Sensing point )
0.8mm
1
3
SEE VIEW C
1.45mm
e1
e
£c1(4x)
3X
GAUGE PLANE
A
A2
0.10 C
L
£c2(4x)
VIEW C
b(3x)
Symbol
A
A1
A2
b
C
D
E
HE
L
L1
e
e1
θ
θ1
θ2
Dimensions In Millimeters
Min.
1.05
0.05
1.00
0.25
0.08
2.70
1.50
2.60
0.30
0.50
1.80
0.85
0o
3o
6o
Nom.
1.10
2.90
1.60
2.80
0.60
1.90
0.95
5o
5o
8o
Max.
1.35
0.15
1.20
0.50
0.20
3.00
1.70
3.00
0.55
0.70
2.00
1.05
10o
7o
10o
Anachip Corp.
www.anachip.com.tw
£c
L1
A1
SEATING PLANE
Dimensions In Inches
Min.
0.041
0.002
0.039
0.010
0.003
0.106
0.059
0.102
0.012
0.020
0.071
0.033
0o
3o
6o
Nom.
0.043
0.114
0.063
0.110
0.024
0.075
0.037
5o
5o
8o
Max.
0.053
0.006
0.047
0.020
0.008
0.118
0.067
0.118
0.022
0.028
0.079
0.041
10o
7o
10o
Rev. A5 Jul 14, 2004
7/7
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