Diodes AH1808 User Manual
Ah1808, Description, Features
AH1808
Document number: DS35655 Rev. 4 - 2
1 of 9
February 2014
© Diodes Incorporated
AH1808
HIGH SENSITIVITY MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH
Description
The AH1808 is a high sensitivity, micro power Omnipolar Hall Effect
switch IC designed for portable and battery powered consumer
equipment such as cellular phones, PDA’s and portable PC’s to home
appliance and industrial applications. Based on two sensitive Hall
Effect plates and a chopper stabilized architecture the AH1808
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 24µW with a supply of 3V.
The single open drain output can switched on with either a North or
South pole of sufficient strength. When the magnetic flux density (B)
perpendicular to the package is larger than operate point (Bop) the
output is switched on (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.
Features
•
Omnipolar (North or South pole) Operation
• High
Sensitivity
•
Single Open Drain Output
• Micropower
Operation
•
2.5V to 5.5V Operating Range
•
Chopper Stabilized Design Provides
Superior Temperature Stability
Minimal Switch Point Drift
Enhanced Immunity to Stress
•
Good RF Noise Immunity
•
-40°C to +85
°C Operating Temperature
•
ESD (HBM) > 6KV
•
Small Low Profile SOT553 and Industry Standard SC59 Packages
•
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
•
Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
TOP View)
SC59
(TOP View)
SOT553
Applications
•
Cover Switch in Clam-Shell or Slide Type Cellular Phones
•
Display Switch for Portable PCs
•
On/Off Switch for PDAs and Digital Cameras
•
Contact-Less Switch in Consumer Products
• Smart
E-meters
•
Position, Proximity and Level Detection Contact-Less Switch in
Home Appliances and Industrial Applications
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. S 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.