AH1902

Document number: DS36533 Rev. 4 - 2

1 of 11

www.diodes.com

April 2016

© Diodes Incorporated

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 4.3

μA 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.

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



Omnipolar Operation (North or South Pole)



Supply Voltage of 1.6V to 3.6V



High Sensitivity



Micropower Operation



Chopper Stabilized Design Provides:

-

Superior Temperature Stability

-

Minimal Switch Point Drift

-

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)

Pin Assignments

NC

OUTPUT

GND

( Top View )

X1-DFN1216-4

2

1

3

4

X2-DFN2015-6

( Top View )

1

3

2

6

4

5

GND

NC

NC

OUTPUT

NC

5

4

3

2

1

GND

OUTPUT

NC

NC

( Top View )

SOT553

Applications



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

AH1902

1.6V to 3.6V

OUTPUT

GND

Note:

the supply pin as possible.