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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) 123 (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
Typical Application Circuit
4.2V ~28V
Vdd OUT
RL
AH337
GND
Digital Output
Functional Block Diagrams
Vdd 1
Regulator Hall plate 3 2 Amp 2 GND OUT
Anachip Corp. www.anachip.com.tw 2/8
Rev.1.2 Mar. 29, 2006
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=25oC ) Symbol Vdd B VDS 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=25oC )
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=+ 25C, 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 VDS(sat) Iout=10mA, B > Bop Output Leakage Current Ioff B < Brp Supply Current Idd Output Open Output Rise Time tr RL=820, CL=20pF Output Falling Time tf RL=820, 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=25C, 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 )
Vdd
Marking side
Turn off
Bh y
Turn on ( on-state )
N ( SOT23 )
N ( SIP3 ) Vsat 0
Vsat Brp Bop
( 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
AH337
Single Phase Hall Effect Switch
Package Information
(unit: mm)
(1) Package Type: SIP-3L for Bulk Pack
0.51mm NOM 2.00mm
1.15mm
BRANDED SURFACE
1
2
3
Active Area Depth
Package Dimension
45
Sensor Location
0.38mm 0.7mm
1.57mm 1.47mm 0.41mm 0.41mm
3
4.17mm 4.04mm 1.27mm
2 1
1.82 mm
45
3.10mm 2.97mm
15.50mm 13.00mm
Anachip Corp. www.anachip.com.tw 6/8
Rev.1.2 Mar. 29, 2006
AH337
Single Phase Hall Effect Switch
Package Information (Continued)
(2) Package Type: Spread leg SIP-3L for Ammo-Pack only
p p
H A L
B
W1
W
P2 Po
F1
D0 F2 h h D
A n s ic h t A -B v ie w A -B T1 T b2
A
Symbol A D b2 D0 F1 F2 H h L P0 P2 p T T1 W W1
Dimensions In Millimeters Min. Nom. Max. 2.80 3.00 3.20 3.90 4.10 4.30 0.33 0.38 0.42 3.80 4.00 4.20 2.35 2.55 2.75 2.45 2.55 2.85 20 1 11 12.2 12.7 13.2 5.95 6.35 6.75 1 0.55 1.42 17.5 18.0 18.5 5.5 6.0 6.5
Dimensions In Inches Min. Nom. Max. 0.110 0.118 0.125 0.153 0.161 0.169 0.012 0.014 0.016 0.149 0.157 0.165 0.092 0.100 0.108 0.096 0.100 0.112 0.787 0.039 0.433 0.480 0.5 0.519 0.234 0.25 0.265 0.039 0.021 0.055 0.688 0.708 0.728 0.216 0.236 0.255
Package Information (Continued)
Anachip Corp. www.anachip.com.tw 7/8 Rev.1.2 Mar. 29, 2006
AH337
Single Phase Hall Effect Switch
(3) Package Type: SOT23-3L
D
( Sensing point )
E HE 0.8mm GAUGE PLANE L L1 e1 e
1(4x)
1
1.45mm
3
VIEW C
C
2
A2
A
b(3x)
2(4x)
Symbol A A1 A2 b C D E HE L L1 M e e1 1 2
Dimensions In Millimeters Min. 1.05 0.05 1.00 0.25 0.08 2.70 1.50 2.60 0.30 0.50 0.73 1.80 0.85 0o 3o 6o Nom. 1.10 2.90 1.60 2.80 0.60 0.78 1.90 0.95 5o 5o 8o Max. 1.35 0.15 1.20 0.50 0.20 3.00 1.70 3.00 0.60 0.70 0.83 2.00 1.05 10o 7o 10o
Min. 0.041 0.002 0.039 0.010 0.003 0.106 0.059 0.102 0.012 0.020 0.029 0.071 0.033 0o 3o 6o
A1
SEE VIEW C
Dimensions In Inches Nom. 0.043 0.114 0.063 0.110 0.024 0.031 0.075 0.037 5o 5o 8o Max. 0.053 0.006 0.047 0.020 0.008 0.118 0.067 0.118 0.024 0.028 0.033 0.079 0.041 10o 7o 10o
Anachip Corp. www.anachip.com.tw 8/8
Rev.1.2 Mar. 29, 2006
M

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