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Diodes Semiconductor Electronic Components Datasheet

AH1902 Datasheet

HIGH SENSITIVITY MICROPOWER OMNIPLOAR HALL-EFFECT SWITCH

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AH1902 pdf
AH1902
HIGH SENSITIVITY MICROPOWER
OMNIPLOAR HALL-EFFECT SWITCH
Description
The AH1902 is a high sensitivity micropower Omnipolar Hall effect
switch IC with internal pull up and pull down capability. Designed for
portable and battery powered consumer equipment such as cellular
phones and portable PCs to office equipment, home appliances and
industrial applications, the average supply current is only 4.3μA at
1.8V. To support potable equipment the AH1902 can operate over the
supply range of 1.6V to 3.6V and uses a hibernating clocking system
to minimize the power consumption. To minimize PCB space the
AH1902 is available in small low profile X1-DFN1216-4,
X2-DFN2015-6 and SOT553 packages.
Pin Assignments
The output is activated with either a north or south pole of sufficient
magnetic field strength. When the magnetic flux density (B)
perpendicular to the package is larger than operate point (Bop), the
output will be turned on (pulled low) and held until B is lower than
release point (Brp).
Features
Applications
Omnipolar Operation (North or South Pole)
Supply Voltage of 1.6V to 3.6V
High Sensitivity
Micropower Operation
Chopper Stabilized Design Provides:
ƒ Superior Temperature Stability
ƒ Minimal Switch Point Drift
ƒ Enhanced Immunity to Physical Stress
No External Pull-up Resistors Required
Good RF Noise Immunity
-40°C to +85°C Operating Temperature
High ESD capability of 8kV (Human Body Model)
Small Low Profile X1-DFN1216-4, X2-DFN2015-6 and SOT553
Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Open and Close Detect for flip/slide Cellular Phones
Smart Cover or Dock Detect for Cellular Phones and Tablet PCs
Cover or Display Switch in Portable PCs (eg Ultrabook)
Digital Still, Video Cameras and Handheld Gaming Consoles
Door, Lids and Tray Position Switches
Level, Proximity and Position Switches
Contact-Less Switches in Home Appliances and Industrial
Applications
Notes:
1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Typical Applications Circuit
Note:
4. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical and should be placed as close to
the supply pin as possible.
AH1902
Document number: DS36533 Rev. 3 - 2
1 of 11
www.diodes.com
July 2014
© Diodes Incorporated



Diodes Semiconductor Electronic Components Datasheet

AH1902 Datasheet

HIGH SENSITIVITY MICROPOWER OMNIPLOAR HALL-EFFECT SWITCH

No Preview Available !

AH1902 pdf
Pin Descriptions
Package: X1-DFN1216-4
Pin Number
1
2
3
4
Pin Name
OUTPUT
GND
NC
VDD
Pad Pad
Output Pin
Ground Pin
No Connection (Note 5)
Function
Power Supply Input
The center exposed pad - It is internally connected to VDD pin and should not
be connected to GND or any other signal on the PCB. The exposed pad
should be left open (unconnected) on the PCB layout.
Package: X2-DFN2015-6
Pin Number
1
2
3
4
5
6
Pin Name
OUTPUT
NC
NC
GND
NC
VDD
Pad Pad
Function
Output Pin
No Connection (Note 5)
No Connection (Note 5)
Ground Pin
No Connection (Note 5)
Power Supply Input
The center exposed pad – No connection internally.
The exposed pad can be left open (unconnected) or tied to the GND on the
PCB layout.
Package: SOT553
Pin Number
1
2
3
4
5
Pin Name
NC
GND
NC
VDD
OUTPUT
No Connection (Note 5)
Ground Pin
No Connection (Note 5)
Power Supply Input
Output Pin
Function
Note:
5. NC is “No Connection” pin and is not connected internally. This pin can be left open or tied to ground.
Functional Block Diagram
AH1902
AH1902
Document number: DS36533 Rev. 3 - 2
2 of 11
www.diodes.com
July 2014
© Diodes Incorporated



Diodes Semiconductor Electronic Components Datasheet

AH1902 Datasheet

HIGH SENSITIVITY MICROPOWER OMNIPLOAR HALL-EFFECT SWITCH

No Preview Available !

AH1902 pdf
AH1902
Absolute Maximum Ratings (Note 6) (@TA = +25°C, unless otherwise specified.)
Symbol
VDD
VDD_REV
IOUTPUT
B
PD
Ts
TJ
ESD HBM
Parameter
Supply Voltage (Note 7)
Reverse Supply Voltage
Output current (source and sink)
Magnetic Flux Density
Package Power Dissipation
X1-DFN1216-4 and X2-DFN2015-6
SOT553
Storage Temperature Range
Maximum Junction Temperature
Human Body Model (HMB) ESD capability
Rating
6
-0.3
3
Unlimited
230
230
-65 to +150
150
8
Unit
V
V
mA
mW
mW
°C
°C
kV
Notes:
6. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
7. The absolute maximum VDD of 6V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to
operate the device at the absolute maximum rated conditions for any period of time.
Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)
Symbol
VDD
TA
Parameter
Supply Voltage
Operating Temperature Range
Operating
Operating
Conditions
Rating
1.6V to 3.6V
-40 to +85
Unit
V
°C
Electrical Characteristics (@TA = +25°C, VDD = 1.8V, unless otherwise specified.)
Symbol
VOL
VOH
Ioff
IDD(awake)
IDD(sleep)
Parameter
Output Low Voltage (on)
Output High Voltage (off)
Output Leakage Current
Supply Current
IDD(avg)
Tawake
Tperiod
D.C.
Average Supply Current
Awake Time
Period
Duty Cycle
Conditions
IOUT = 1mA
IOUT = -1mA
VOUT = 3.6V, Output off
During ‘awake’ period,
TA = +25°C, VDD = 3V
During ‘sleep’ period,
TA = +25°C, VDD = 3V
TA = +25°C, VDD = 1.8V
TA = +25°C, VDD = 3.6V
(Note 8)
(Note 8)
Min
VDD-0.2
Typ
0.1
VDD-0.1
< 0.1
2.1
— 2.5
— 4.3
— 7.2
— 50
— 50
— 0.1
Note:
8. When power is initially turned on, the operating VDD (1.6V to 3.6V) must be applied to guaranteed the output sampling.
The output state is valid after the second operating cycle (typical 100ms).
Max
0.2
1
8
13
100
100
Unit
V
V
µA
mA
µA
µA
µA
µs
ms
%
AH1902
Document number: DS36533 Rev. 3 - 2
3 of 11
www.diodes.com
July 2014
© Diodes Incorporated




Part Number AH1902
Description HIGH SENSITIVITY MICROPOWER OMNIPLOAR HALL-EFFECT SWITCH
Maker Diodes
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