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What is AH1902?

This electronic component, produced by the manufacturer "Diodes", performs the same function as "HIGH SENSITIVITY MICROPOWER OMNIPLOAR HALL-EFFECT SWITCH".


AH1902 Datasheet PDF - Diodes

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


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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

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AH1902 equivalent
Typical Operating Characteristics
60
50
VDD = 1.6V
40
30
20
10
0
-10
-20
-30
-40
-50
-60
-50 -25 0 25 50 75
Temperature (°C)
Switch Points vs Temperature
Bops
Brps
Bhy
Brpn
Bopn
100
60
50
VDD = 3.6V
40
30
20
10
0
-10
-20
-30
-40
-50
-60
-50 -25
0
25 50 75
Temperature (°C)
Switch Points vs Temperature
Bops
Brps
Bhy
Brpn
Bopn
100
10
9
8
7 3.6V
6
5
4
1.8V
1.6V
3
2
1
0
-50
-25
0
25 50 75 100
Temperature (°C)
Average Supply Current vs. Temperature
AH1902
60
50
VDD = 1.8V
40
30
20
10
0
-10
-20
-30
-40
-50
-60
-50 -25 0 25 50 75
Temperature (°C)
Switch Points vs Temperature
Bops
Brps
Bhy
Brpn
Bopn
100
60
50
TA = +25 °C
40
30
20
10
0
-10
-20
-30
-40
-50
-60
1.5 1.8 2.1 2.4 2.7 3 3.3
Temperature (°C)
Switch Points vs Temperature
Bops
Brps
Bhy
Brpn
Bopn
3.6 3.9
10
9 TA = +25 °C
8
7
6
5
4
3
2
1
0
1.5 1.8 2.1 2.4 2.7 3 3.3 3.6 3.9
Supply Voltage (V)
Average Supply Current vs. Supply Voltage
AH1902
Document number: DS36533 Rev. 3 - 2
5 of 11
www.diodes.com
July 2014
© Diodes Incorporated


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Part Details

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Information Total 11 Pages
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Featured Datasheets

Part NumberDescriptionMFRS
AH1902The function is HIGH SENSITIVITY MICROPOWER OMNIPLOAR HALL-EFFECT SWITCH. DiodesDiodes
AH1903The function is HIGH SENSITIVITY MICROPOWER UNIPOLAR/OMNIPOLAR SELECTABLE HALL-EFFECT SWITCH. DiodesDiodes

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