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AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Features
• Micropower operation
• Operation with North or South Pole
• 2.4 to 5.5V battery operation
• Chopper Stabilized
• Superior temperature stability
• Extremely Low Switch-Point Drift
• Insensitive to Physical Stress
• Good RF noise immunity
• -40°C to 85°C operating temperature
• Low profile 3 pin SC59 (commonly known as SOT23 in
Asia) and DFN2020-6 package
• ESD (HBM) ＞ 4KV for DFN2020-6
• SC59 (commonly known as SOT23 in Asia) and
DFN2020-6: Available in “Green” Molding Compound
(No Br, Sb)
• Lead Free Finish/ RoHS Compliant (Note 1)
Applications
• Cellular phone
• PDA
• Cordless phone
General Description
AH1803 is with two Hall effect plates and a CMOS output driver,
mainly designed for battery–operation, hand-held equipment
(such as Cellular and Cordless Phone, PDA). The total operation
power is down to 24uW in the 3V supply.
Either North or South Pole of sufficient strength will turn the
output on. The output will be turned off under no magnetic field.
While the magnetic flux density (B) is larger than operate point
(Bop), the output will be turned on (low), the output is held until
B is lower than release point (Brp), then turned off (High).
Typical Circuit
2.4~5.5V
C*
AH1803
GND
C is for power stabilization and to strengthen the noise immunity, the
*
recommended capacitance is 10nF~100nF.
Output
AH1803 Rev. 9 1 of 9 OCTOBER 2009
DS31193 www.diodes.com © Diodes Incorporated
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Ordering Information
AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
AH1803 - XX G - 7
Package
W : SC59
Green
G : Green
SN : DFN2020-6
Product
AH1803-WG-7 W SC59 3000/Tape & Reel -7
AH1803-SNG-7 SN DFN2020-6 3000/Tape & Reel -7
Notes: 1. EU Directive 2002/95/ EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/datasheets/ap02001.pdf
http://www.diodes.com/products/lead_free.html
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
Pin Assignments
(1) SC59 (commonly known as SOT23 in Asia) (2) DFN2020-6
Package
Code
Packaging
(Note 2)
.
.
Quantity Part Number Suffix
( Top View )
Packing
7 : Tape & Reel
7” Tape and Reel
( Top View )
5. GND
4. NC6. NC
2. Output
GND 3.
1. Vdd
1. Vdd 2. NC 3. Output
Notes: 3. NC is “No Connection”, which is recommended to be tied to ground.
Pin Descriptions
Pin Name P/I/O Description
Vdd P/I Power Supply Input
GND P/I Ground
Output O Output Pin
NC No Connected
AH1803 Rev. 9 2 of 9 OCTOBER 2009
DS31193 www.diodes.com © Diodes Incorporated
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S
Block Diagram
Hall Plate
Cancelling
AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
Vdd
Power
switch
Offset
Amp
Latch
SWITCH
Logical
Hall Plate
Absolute Maximum Ratings (at T
Symbol Characteristics Values Unit
Vdd Supply voltage 7 V
B Magnetic flux density Unlimited
Ts Storage Temperature Range -65 to +150
PD
Package Power Dissipation
TJ
Maximum Junction Temperature 150
Recommended Operating Conditions ( T
Symbol Parameter Conditions Rating Unit
Vdd
TA Operating Temperature Range Operating -40 to +85
upply Voltage Operating 2.4~5.5 V
Cancelling
Offset
Amp
Latch
= 25°C)
A
SC59 230 mW
DFN2020-6 230 mW
= 25°C )
A
Output
GND
°C
°C
°C
AH1803 Rev. 9 3 of 9 OCTOBER 2009
DS31193 www.diodes.com © Diodes Incorporated
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AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Electrical Characteristics (TA= +25°C, Vdd= 3V; unless otherwise specified)
Symbol Characteristic Conditions Min Typ. Max Unit
VOH Output On Voltage (High side) I
VOL Output On Voltage (Low side) I
Idd(en)
Idd(dis)
Supply Current
Idd(avg)
Tawake Awake Time
Tperiod Period
D.C. Duty Cycle - 0.1 - %
Notes: 5. When power is initially on, the operating Vdd (2.4V to 5.5V) must be applied to be guaranteed for the output sampling. The output state is valid
after the second operating phase (typical 150ms).
= -1mA Vdd-0.2 - - V
OUT
= 1mA - - 0.1 V
OUT
Chip enable, T
Vdd = 3V
Chip enable, T
Vdd = 2.4~5.5V
Chip disable, T
Vdd = 3V
Chip disable, T
Vdd = 2.4~5.5V
Average supply current,
= 25°C , Vdd = 3V
T
A
Average supply current,
= -40~85°C, Vdd = 2.4~5.5V
T
A
(Note 5)
(Note 5)
= 25°C,
A
= -40~85°C,
A
= 25°C,
A
= -40~85°C,
A
- 3 6 mA
- 3 9 mA
- 5 10 µA
- 5 18 µA
- 8 16 µA
- 8 27 µA
- 75 150 µs
- 75 150 ms
Tperiod
Tawake
Idd(en)
Sample and output
Idd (dis)
0
latched
AH1803 Rev. 9 4 of 9 OCTOBER 2009
DS31193 www.diodes.com © Diodes Incorporated
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AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Magnetic Characteristics (TA = 25°C, Vdd = 3V, Note 6, 7)
(1mT = 10G)
Symbol Parameter Min Typ. Max Unit
Bops(south pole to brand side) 2 3 4
Bopn(north pole to brand side)
Brps(south pole to brand side) 1 2 Brpn(north pole to brand side)
Bhy(
Notes: 6. Typical data is at TA=25 °C, Vdd=3V, and for design information only.
7. Magnetic characteristics are for design information, which will vary with supply voltage, oper ating temperature and after soldering.
)
BrpxBopx −
Operation Point
Release Point
-4 -3 -2
- -2 -1
Hysteresis 0.5 1 -
Output
Output
mT
( off-state )
Vcc
( Output Voltage )
Turn on
( on-state )
Bhy
Turn off
Vsat
Turn off
( Output Voltage )
Vsat
Bopn Brpn 0
( Magnetic flux density B )
( Magnetic flux density B )
Performance Characteristics
(1) SC59 (commo nly known as SOT23 in Asia) and DFN2020-6
TA (°C)
PD (mW)
25 50 60 70 80 85 90 100 110 120 130 140 150
230 184 166 147 129 120 110 92 74 55 37 18 0
P
(mW)
D
300
200
P o we r Dis si p atio n C u rv e
( off-state )
Bhy
Brps Bops0
Vcc
Turn on
( on-state )
100
0
0 25 50 75 100 125 150
85-40
TA (oC)
AH1803 Rev. 9 5 of 9 OCTOBER 2009
DS31193 www.diodes.com © Diodes Incorporated
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AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
Marking Information
(1) SC59 (commonly known as SOT23 in Asia)
( Top View )
XX Y W
X
XX : Identification code
Y
: Year 0~9
W
: Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
X
: A~Z : Green
SWITCH
(2) DFN2020-6
Part Number Package Identification Code
AH1803 SC59 KD
( Top View )
Pin 1 indicator
: Identifica tio n C o d e
XX
Y
WX
XX
Y : Y e ar : 0~ 9
: Week : A~Z : 1~26 week;
W
a~z : 27~52 week; z represents
52 and 53 week
: A~Z : Green
X
Part Number Package Identification Code
AH1803 DFN2020-6 KD
AH1803 Rev. 9 6 of 9 OCTOBER 2009
DS31193 www.diodes.com © Diodes Incorporated
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AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
Package Information (All Dimensions in mm)
(1) Package Type: SC59 (commonly known as SOT23 in Asia)
0.35/0.50
SWITCH
1.00/
1.30
0.013/0.10
TOP VIEW
1.90
2.90/3.10
0.95
2.70/
1.50/
1.70
3.00
0.35/0.55
(2) Package Type: DFN2020-6
0.57/0.63
0.05 C
0.08 C
C
Pin#1 ID
B
0.15
0/0.05
2x
1.95/2.075
1.45/1.65
Marking
0.10/0.20
0.15max.
A
O
0O/8
0.43mon.
(Active area depth)
Seating plane
C
Sensor location
0.97/1.04
C
L
0.76/0.96
0.2/0.3
0.05
M C A B
2x-
1.95/2.075
0.15 C
0.65nom.
0.97/1.04
0.30/0.40
C
L
Bottom View
AH1803 Rev. 9 7 of 9 OCTOBER 2009
DS31193 www.diodes.com © Diodes Incorporated
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Taping Orientation
For DFN2020-6
AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Notes: 8. The taping or ient ati on of the other package type can be found on our website at http://www.diodes.com/dat asheets/ ap02007.pdf .
AH1803 Rev. 9 8 of 9 OCTOBER 2009
DS31193 www.diodes.com © Diodes Incorporated
Page 9
AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
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DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
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changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any
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without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant i nto the body, or
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in the labeling can be reasonably expected to result in significant injury to the user.
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Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or
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Customers must fully indemnify Diodes Incorporated and its representat ives against any damages arising out of the use of Diodes
Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2009, Diodes Incorporated
www.diodes.com
IMPORTANT NOTICE
LIFE SUPPORT
AH1803 Rev. 9 9 of 9 OCTOBER 2009
DS31193 www.diodes.com © Diodes Incorporated
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