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AH180-PL-A

P1-P3P4-P6P7-P9P10-P12P13-P13
AH180
MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR
SWITCH
AH180
Document number: DS31023 Rev. 17 - 2
1 of 13
www.diodes.com
July 2010
© Diodes Incorporated
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.
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
• -40qC to 85qC operating temperature
• ESD (HBM) Ї 5KV for DFN2020-6, DFN2020-3
Ї 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)
Pin Assignments
(Top View)
1.
Vdd
2.
GND
3.
Output
(SIP-3L)
1.Vdd
3.
GND 2.
Output
(Top View)
SC59
1. Vdd 2. NC 3. Output
4. NC6. NC
5. GND
(Top View)
DFN2020-6
1. Vdd
3. Output
3. GND
( Top View )
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
MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR
SWITCH
AH180
Document number: DS31023 Rev. 17 - 2
2 of 13
www.diodes.com
July 2010
© Diodes Incorporated
Typical Application Circuit
AH180
2.5~5.5V
Output
Gnd
R
L
C
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
Functional Block Diagram
Output
GND
Logical
Latch
Latch
Power
switch
Vdd
Hall Plate
Amp
Offset
Cancelling
Hall Plate
Amp
Offset
Cancelling
Pin Name P/I/O Description
Vdd P/I Power Supply Input
GND P/I Ground
Output O Output Pin
NC NC No Connected
AH180
MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR
SWITCH
AH180
Document number: DS31023 Rev. 17 - 2
3 of 13
www.diodes.com
July 2010
© Diodes Incorporated
Absolute Maximum Ratings (T
A
= 25
q
C)
Symbol Characteristics Values Unit
Vdd Supply voltage 7 V
B Magnetic flux density Unlimited
Ts Storage Temperature Range -65 to +150
qC
P
D
Package Power Dissipation
SIP-3L 550 mW
SC59-3L/ DFN2020-6/
DFN2020-3
230 mW
T
J
Maximum Junction Temperature 150
qC
Recommended Operating Conditions
Symbol Parameter Conditions Min
Max
Unit
Vdd Supply Voltage Operating 2.5 5.5 V
T
A
Operating Ambient Temperature Operating -40
85
qC
Electrical Characteristics (T
A
= 25
q
C, Vdd = 3V; unless otherwise specified)
Symbol Characteristic Conditions Min Typ. Max Unit
Vout Output On Voltage Iout =1mA
0.1 0.3 V
Ioff Output Leakage Current Vout =5.5V, Output off
<0.1
1 μA
Idd(en)
Supply Current
Chip enable, T
A
= 25qC, Vdd = 3V
3 6 mA
Idd(en)
Chip enable, T
A
= -40~85qC,
Vdd = 2.5~5.5V
3 9 mA
Idd(dis)
Chip disable, T
A
= 25qC, Vdd = 3V
5 10 μA
Idd(dis)
Chip disable, T
A
= -40~85qC,
Vdd = 2.5~5.5V
5 15 μA
Idd(avg)
Average supply current,
T
A
= 25qC, Vdd = 3V
8 16 μA
Idd(avg)
Average supply current,
T
A
= -40~85qC, Vdd = 2.5~5.5V
8 24 μA
Tawake Awake Time (Note 2)
75 125 μs
Tperiod Period (Note 2)
75 125 ms
D.C. Duty Cycle
0.1
%
Notes: 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).
Idd (dis)
Idd(en)
Tawake
Tperiod
0
Sample and output
latched
P1-P3P4-P6P7-P9P10-P12P13-P13

AH180-PL-A

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Description:
MAGNETIC SWITCH OMNIPOLAR 3SIP
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