AH1895
MEDIUM SENSITIVITY MICROPOWER
OMNIPLOAR HALL-EFFECT SWITCH
Description Pin Assignments
The AH1895 is a medium sensitivity micropower Omnipolar Hall effect
(Top View)
switch IC with internal pull up and pull down capability. Designed for
portable and battery powered equipment such as cellular phones and
portable PCs to home appliances and industrial applications, the
average supply current is only 4.3uA at 1.85V. To support portable
equipment the AH1895 can operate over the supply range of 1.6V to
X1-DFN1216-4
3.6V and uses a hibernating clocking system to minimize the power
consumption. To minimize PCB space the AH1895 is available in
(Top View)
small low profile X1-DFN1216-4 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
SOT553
release point (Brp). The output will remain off when there is no
magnetic field.
Features
Applications
Omnipolar Operation (North or South pole)
Open and Close Detect for Cellular Phones
Supply Voltage of 1.6V to 3.6V
Holster or cover detect for cellular phones and Tablet PCs
Medium Sensitivity
Cover or Display Switches in Portable PCs
Micropower Operation
Digital Still, Video Cameras and Handheld Gaming Consoles
Chopper Stabilized Design Provides:
Door, Lids and Tray Position Switches
Superior Temperature Stability
Level, Proximity and Position Switches
Minimal Switch Point Drift
Contact-Less Switches in Home Appliances and Industrial
Enhanced Immunity to Physical Stress
Applications
No External Pull-up Resistors Required
Good RF Noise Immunity
-40C to +85C Operating Temperature
High ESD capability of 8kV (Human Body Model)
Small Low Profile X1-DFN1216-4 and SOT553 Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. Green Device (Note 3)
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See
AH1895
Pin Descriptions
Package: X1-DFN1216-4
Pin Number Pin Name Function
1 OUTPUT Output Pin
2 Power Supply Input
V
DD
3 NC No Connection (Note 5)
4 GND Ground Pin
Package: SOT553
Pin Number Pin Name Function
1 Power Supply Input
V
DD
2 NC No Connection (Note 5)
3 NC No Connection (Note 5)
4 GND Ground
5 OUTPUT Output
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
2 of 10 July 2013
AH1895
Diodes Incorporated
www.diodes.com
Document number: DS35742 Rev. 1 - 2
NEW PRODUCT