AH180
MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR
SWITCH
Description
AH180 is a micro-power Omnipolar Hall-Effect switch
designed for portable and battery powered equipment such
cellular phones, PDAs and portable PCs. Based on two Hall-
Effect plates and a chopper stabilized architecture the AH180
provides a reliable solution over the whole operating range.
To support portable and battery powered equipment the
design has been optimized to operate over the supply range
of 2.5V to 5.5V and consumes only 24uW with a supply of 3V.
The single open-drain output switches on with either a north
or south pole of sufficient strength.
When the magnetic flux density (B) is larger than operate
point (Bop), output is switched on (Output pin is pulled low).
The output is turned off when
B
becomes lower than the
release point (Brp). The output will remain off when there is
no magnetic field.
The AH180 is available in SIP-3L, SC59, DFN2020-3, and
DFN2020-6 packages.
Pin Assignments
(Top View)
3. Output
2. GND
1. Vdd
(SIP-3L)
(Top View)
3. Output
GND 2.
SC59
1 . Vdd
(Top View)
6. NC 5. GND 4. NC
( Top View )
3. GND
Features
•
•
•
•
•
Omnipolar (north or south pole) operation
Micropower operation
Single open drain output
2.5V to 5.5V operating voltage
Chopper stabilized design provides
• Superior temperature stability
• Minimal switch-point drift
• Enhanced immunity to stress
Good RF noise immunity
-40°C to 85°C operating temperature
ESD (HBM)
＞
5KV for DFN2020-6, DFN2020-3
＞
6KV for SIP-3L and SC59
SIP-3L, SC59 (commonly known as SOT23 in Asia)
DFN2020-6, DFN2020-3 packages
Green Molding Compound (No Br, Sb) (Note 1)
1. Vdd
2. NC
3. Output
1. Vdd
DFN2020-6
3. Output
DFN2020-3
Applications
•
•
•
Cover switch in clam-shell cellular phones
Cover switch in Notebook PC/PDA
Contact-less switch in consumer products
•
•
•
•
•
Notes:
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.
AH180
Document number: DS31023 Rev. 17 - 2
1 of 13
www.diodes.com
July 2010
© Diodes Incorporated
AH180
MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR
SWITCH
Typical Application Circuit
2.5~5.5V
R
L
C
AH180
Gnd
Output
Note: C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF~100nF.
R
L
is the pull-up resistor, the recommended resistance is 10Kohm~100Kohm.
Pin Descriptions
Pin Name
Vdd
GND
Output
NC
P/I/O
P/I
P/I
O
NC
Description
Power Supply Input
Ground
Output Pin
No Connected
Functional Block Diagram
Vdd
Power
switch
Hall Plate
Offset
Cancelling
Amp
Latch
Output
Logical
GND
Hall Plate
Offset
Cancelling
Amp
Latch
AH180
Document number: DS31023 Rev. 17 - 2
2 of 13
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July 2010
© Diodes Incorporated
AH180
MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR
SWITCH
Absolute Maximum Ratings
(T
A
= 25°C)
Symbol
Vdd
B
Ts
P
D
T
J
Characteristics
Supply voltage
Magnetic flux density
Storage Temperature Range
Package Power Dissipation
Maximum Junction Temperature
SIP-3L
SC59-3L/ DFN2020-6/
DFN2020-3
Values
7
Unlimited
-65 to +150
550
230
150
Unit
V
°C
mW
mW
°C
Recommended Operating Conditions
Symbol
Vdd
T
A
Parameter
Supply Voltage
Operating Ambient Temperature
Conditions
Operating
Operating
Min
2.5
-40
Max
5.5
85
Unit
V
°C
Electrical Characteristics
(T
A
= 25
°C,
Vdd = 3V; unless otherwise specified)
Symbol
Vout
Ioff
Idd(en)
Idd(en)
Idd(dis)
Idd(dis)
Idd(avg)
Idd(avg)
Tawake
Tperiod
D.C.
Notes:
Characteristic
Output On Voltage
Output Leakage Current
Conditions
Iout =1mA
Vout =5.5V, Output off
Chip enable, T
A
= 25°C, Vdd = 3V
Chip enable, T
A
= -40~85°C,
Vdd = 2.5~5.5V
Chip disable, T
A
= 25°C, Vdd = 3V
Chip disable, T
A
= -40~85°C,
Vdd = 2.5~5.5V
Average supply current,
T
A
= 25°C, Vdd = 3V
Average supply current,
T
A
= -40~85°C, Vdd = 2.5~5.5V
(Note 2)
(Note 2)
Min
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
Typ.
0.1
<0.1
3
3
5
5
8
8
75
75
0.1
Max
0.3
1
6
9
10
15
16
24
125
125
⎯
Unit
V
µA
mA
mA
µA
µA
µA
µA
µs
ms
%
Supply Current
Awake Time
Period
Duty Cycle
2. When power is initially turned on, Vdd must be within its correct operating range (2.5V to 5.5V) to guarantee 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
AH180
Document number: DS31023 Rev. 17 - 2
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July 2010
© Diodes Incorporated
AH180
MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR
SWITCH
Magnetic Characteristics
(T
A
= 25
°C,
Vdd = 3V, Note 3, 4)
Option 1:
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|)
Option 2:
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:
(1mT=10 Gauss)
Parameter
Operation Point
Release Point
Hysteresis
Min
-
-60
10
-
-
Typ.
40
-40
30
-30
15
Max
60
-
-
-10
-
Unit
Gauss
(1mT=10 Gauss)
Parameter
Operation Point
Release Point
Hysteresis
Min
-
-60
20
-
-
Typ.
40
-40
30
-30
15
Max
60
-
-
-20
-
Unit
Gauss
3. Typical data is at T
A
= 25°C, Vdd = 3V, and for design information only.
4. Magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
Operating Characteristics
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 )
AH180
Document number: DS31023 Rev. 17 - 2
4 of 13
www.diodes.com
July 2010
© Diodes Incorporated
AH180
MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR
SWITCH
Performance Characteristics
(1) SIP-3L
T
A
(°C)
P
D
(mW)
T
A
(°C)
P
D
(mW)
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
D
(mW)
6 00
5 00
4 00
3 00
2 00
1 00
0
0
-40
25
Power Dissipation Curve
50
75
85
100
1 25
T
A
(
o
C)
15 0
(2) SC59 (commonly known as SOT23 in Asia), DFN2020-6 and DFN2020-3
25
50
60
70
80
85
90
100
110
120
T
A
(°C)
P
D
(mW)
230
184
166
147
129
120
110
92
74
55
130
37
140
18
150
0
P
D
(m W )
300
P o w e r D is s i p a tio n C u rv e
200
100
0
-4 0
0
25
50
75
85
100
12 5
150
o
T
A
( C)
AH180
Document number: DS31023 Rev. 17 - 2
5 of 13
www.diodes.com
July 2010
© Diodes Incorporated
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