NOT RECOMMENDED FOR NEW DESIGN
MICROPOWER, ULTRA-SENSITIVE OMNIPOLAR HALL-EFFECT SENSOR SWITCH
The AH1802 is a high-sensitivity, micropower, omnipolar Hall Effect
switch integrated circuit (IC) designed for portable and battery-powered
equipment, such as cellular phones, PDAs, and portable PCs. Based on
two sensitive Hall Effect plates and a chopper-stabilized architecture,
the AH1802 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 be switched on with either a north or
south pole of sufficient strength. When the magnetic flux density (B)
perpendicular to the part marking surface 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 remains
off when there is no magnetic field.
6. OUTPUT 5. NC 4. VDD
1. NC 2. GND 3. NC
1. VDD 2. OUTPUT
Omnipolar (North or South Pole) Operation
2.5V to 5.5V Operating Range
Single Open-Drain Output
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 > 5kV for U-DFN2020-6, U-DFN2020-3 and X2- DFN2015-3
ESD > 6kV for SC59
Low Profile SC59, U-DFN2020-6, U-DFN2020-3 and
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 Tablets
Cover or Display Switch in Portable PCs (such as Ultrabook™)
Display Switch for Portable PCs
On/Off switch for PDAs and Digital Cameras
Contactless Switch in Consumer Products
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
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.
Ultrabook is a trademark of Intel Corporation or its subsidiaries in the U.S. and/or other countries.
Document number: DS31170 Rev. 10 - 3
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© Diodes Incorporated