AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
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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)
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).
•
•
•
•
•
•
Applications
•
•
•
Cellular phone
PDA
Cordless phone
Typical Circuit
2.4~5.5V
C
*
AH1803
GND
Output
to strengthen
*
C is for power stabilization and10nF~100nF. the noise immunity, the
recommended capacitance is
AH1803 Rev. 9
DS31193
1 of 9
www.diodes.com
OCTOBER 2009
©
Diodes Incorporated
AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Ordering Information
AH1803 - XX G - 7
Package
W : SC59
SN : DFN2020-6
Product
AH1803-WG-7
AH1803-SNG-7
Notes:
Green
G : Green
Packing
7 : Tape & Reel
Package
Code
W
SN
Packaging
(Note 2)
SC59
DFN2020-6
7” Tape and Reel
Quantity
Part Number Suffix
3000/Tape & Reel
-7
3000/Tape & Reel
-7
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
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
http://www.diodes.com/datasheets/ap02001.pdf.
Pin Assignments
(1) SC59 (commonly known as SOT23 in Asia)
(2) DFN2020-6
( Top View )
( Top View )
2. Output
GND 3.
1. Vdd
6. NC
5. GND
4. NC
1. Vdd
Notes:
3. NC is “No Connection”, which is recommended to be tied to ground.
2. NC
3. Output
Pin Descriptions
Pin Name
Vdd
GND
Output
NC
P/I/O
P/I
P/I
O
Description
Power Supply Input
Ground
Output Pin
No Connected
AH1803 Rev. 9
DS31193
2 of 9
www.diodes.com
OCTOBER 2009
©
Diodes Incorporated
AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Block Diagram
Vdd
Power
switch
Offset
Cancelling
Hall Plate
Amp
Latch
Logical
Offset
Cancelling
Hall Plate
Output
Amp
Latch
GND
Absolute Maximum Ratings
Symbol
Vdd
B
Ts
P
D
T
J
(at T
A
= 25°C)
Characteristics
Supply voltage
Magnetic flux density
Storage Temperature Range
Package Power Dissipation
Maximum Junction Temperature
SC59
DFN2020-6
Values
7
Unlimited
-65 to +150
230
230
150
Unit
V
°C
mW
mW
°C
Recommended Operating Conditions
Symbol
Vdd
T
A
Parameter
Supply Voltage
Operating Temperature Range
( T
A
= 25°C )
Conditions
Operating
Operating
Rating
2.4~5.5
-40 to +85
Unit
V
°C
AH1803 Rev. 9
DS31193
3 of 9
www.diodes.com
OCTOBER 2009
©
Diodes Incorporated
AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Electrical Characteristics
Symbol
V
OH
V
OL
Idd(en)
Characteristic
(T
A
= +25°C, Vdd= 3V; unless otherwise specified)
Conditions
Min
Typ.
-
-
3
3
5
5
8
8
75
75
0.1
Max
-
0.1
6
9
10
18
16
27
150
150
-
Unit
V
V
mA
mA
µA
µA
µA
µA
µs
ms
%
Idd(dis)
Idd(avg)
Tawake
Tperiod
D.C.
Notes:
Output On Voltage (High side) I
OUT
= -1mA
Vdd-0.2
Output On Voltage (Low side) I
OUT
= 1mA
-
Chip enable, T
A
= 25°C,
-
Vdd = 3V
Chip enable, T
A
= -40~85°C,
-
Vdd = 2.4~5.5V
Chip disable, T
A
= 25°C,
-
Vdd = 3V
Supply Current
Chip disable, T
A
= -40~85°C,
-
Vdd = 2.4~5.5V
Average supply current,
-
T
A
= 25°C , Vdd = 3V
Average supply current,
-
T
A
= -40~85°C, Vdd = 2.4~5.5V
Awake Time
-
(Note 5)
Period
-
(Note 5)
Duty Cycle
-
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).
Tperiod
Tawake
Idd(en)
Idd (dis)
0
Sample and output
latched
AH1803 Rev. 9
DS31193
4 of 9
www.diodes.com
OCTOBER 2009
©
Diodes Incorporated
AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
Magnetic Characteristics
Symbol
Bops(south pole to brand side)
Bopn(north pole to brand side)
Brps(south pole to brand side)
Brpn(north pole to brand side)
Bhy(
Bopx
−
Brpx
)
Notes:
(T
A
= 25
°
C, Vdd = 3V, Note 6, 7)
(1mT = 10G)
Max
Unit
4
-2
-
-1
-
Parameter
Operation Point
Release Point
Hysteresis
Min
2
-4
1
-
0.5
Typ.
3
-3
2
-2
1
mT
6. Typical data is at T
A
=25
°C,
Vdd=3V, and for design information only.
7. Magnetic characteristics are for design information, which will vary with supply voltage, operating temperature and after soldering.
Output
( Output Voltage )
( Output Voltage )
Output
V
cc
( off-state )
Turn off
Turn on
( off-state )
V
cc
B
hy
Turn off
B
hy
Turn on
( on-state )
V
sat
B
opn
B
rpn
0
( Magnetic flux density B )
V
sat
( on-state )
0 B
rps
B
ops
( Magnetic flux density B )
Performance Characteristics
(1)
SC59 (commonly known as SOT23 in Asia) and DFN2020-6
25
50
60
70
80
85
90
100
T
A
(
°
C)
230
P
D
(m W )
300
110
74
120
55
130
37
140
18
150
0
P
D
(mW)
184
166
147
129
120
110
92
P o w e r D is s i p a tio n C u rv e
200
100
0
0
-4 0
25
50
75
85
100
12 5
150
o
T
A
( C)
AH1803 Rev. 9
DS31193
5 of 9
www.diodes.com
OCTOBER 2009
©
Diodes Incorporated
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