AH337
Single Phase Hall Effect Switch
Features
- 4.2V to 28V DC operation voltage
- Temperature compensation
- Wide operating voltage range
- Open drain pre-driver
- 25mA maximum sinking output current.
- Package: SIP3, SOT23
General Description
AH337 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-drain
output. The bandgap regulator allows a wide
operating voltage range.
If a magnetic flux density larger than threshold Bop,
DO is turned on(low). The output state is held until
a magnetic flux density reversal falls below Brp
causing DO to be turned off (high).
Applications
- VCD/DVD loader, CD/DVD ROM
- Cover detector
- Speed measurement
- Home appliances
- Home safety
Pin Assignment
337
Pin Descriptions
Name
P/I/O
P
P
O
Pin #
1
2
3
Description
Positive Power Supply
Ground
Output Pin
2
(Top view)
337
1 : Vdd
1
3
Vdd
GND
OUT
2 : GND
3 : OUT
(SOT23 package)
1 2 3
(SIP package)
Ordering Information
AH337 X - X X X
Wafer Body
Blank or
A~Z : if necessary
to specify
Package
P: SIP3
W: SOT23
Lead
L : Lead Free
Packing
Blank : Bulk
A : Spread-leg ammo pack for SIP-3L;
Tape & Reel for SOT23
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.1.2 Mar. 29, 2006
1/8
AH337
Single Phase Hall Effect Switch
Absolute Maximum Ratings
Characteristics
Supply Voltage
Magnetic Flux Density
Output OFF Voltage
Output “ON” Current
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temp.
Package Power Dissipation
( at Ta=25
o
C )
Symbol
Vdd
B
V
DS
Id
Ta
Ts
Tj
Pd
Values
30
Unlimited
30
25
-40~+125
-65~+150
150
550
230
Unit
V
V
mA
°C
°C
°C
mW
mW
Continuous
SIP-3L
SOT23-3L
Recommended Operating Conditions
( Ta=25
o
C )
Paramter
Supply Voltage
Symbol
Vdd
Conditions
Operating
Rating
4.2*~28
Unit
V
*Note:
The output of IC will be switched after the supply voltage is over 4.2V, but the magnetic characteristics won't be normal until the
supply is over 4.5V.
Electrical Characteristics
(Ta=+ 25°C, Vdd=12V)
Min
-
-
-
-
-
Typ
300
<0.1
2
0.1
0.1
Max
400
10
4
1
1
Units
mV
uA
mA
us
us
Characteristic
Symbol
Test Conditions
Output Saturation Voltage V
DS(sat)
Iout=10mA, B > Bop
Output Leakage Current
Ioff
B < Brp
Supply Current
Idd
Output Open
Output Rise Time
tr
RL=820Ω, CL=20pF
Output Falling Time
tf
RL=820Ω, CL=20pF
Test Circuit
12V
OUT
RL
RL=820 Ohm
CL=20 pF
CL
Test Circuit
Anachip Corp.
www.anachip.com.tw
3/8
Rev.1.2 Mar. 29, 2006
AH337
Single Phase Hall Effect Switch
Magnetic Characteristics
Parameter
Operate Point
Release Point
Hysteresis
(Ta=25°C, Vdd=4.5V to 28V)
(1mT=10Gauss)
Max.
Unit
150
Gauss
90
Gauss
-
Gauss
Symbol
Bop
Brp
Bhys
Min.
90
30
-
Typ.
120
60
60
Output
S
S
Marking side
( Output Voltage )
( off-state )
V
dd
Marking side
Turn off
B
h
y
Turn on
( on-state )
N
( SOT23 )
N
( SIP3 )
V
sat
0
V
sat
B
rp
B
op
( Magnetic flux density B )
Performance Characteristics (SIP3)
Ta (°C)
Pd (mW)
Ta (°C)
Pd (mW)
P d (m W )
600
500
400
300
200
100
0
0
25
50
75
100
125
150
T a (。 C )
25
550
105
198
50
440
110
176
60
396
115
154
70
352
120
132
80
308
125
110
85
286
130
88
90
264
135
66
95
242
140
44
100
220
150
0
P o w e r D is s ip a tio n C u rv e
Anachip Corp.
www.anachip.com.tw
4/8
Rev.1.2 Mar. 29, 2006
AH337
Single Phase Hall Effect Switch
Performance Characteristics (SOT23-3)
Ta (°C)
Pd (mW)
25
230
300
200
100
0
0
25
50
75
100
125
150
T a (。 C )
50
184
60
166
70
147
80
129
90
110
100
92
110
74
120
55
125
46
130
37
140
18
150
0
P d (m W )
P o w e r D is s ip a tio n C u rv e
Marking Information
(1) SIP3
(Top View)
337
YWW X
ID Code:
A~Z: Non-Lead Free
a~z : Lead Free
Date code
Y : Year
WW : Nth week
(2) SOT23
(Top View)
ID code
A~Z: Non-Lead Free
a~z: Lead Free
P1:AH337
Date code
Y : Year
M :Month(A~L)
XX YM X
Anachip Corp.
www.anachip.com.tw
5/8
Rev.1.2 Mar. 29, 2006
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