AH1815
LOW SENSITIVITY MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH
Description
The AH1815 is a low-sensitivity, micro-power Omnipolar Hall effect
switch IC, designed for portable and battery powered consumer
equipment for home appliance and industrial applications such as
smart-meter magnetic-tamper detection. Based on two sensitive Hall
effect plates and a chopper-stabilized architecture, the AH1815
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.
Pin Assignments
(Top View)
GND 2
3 OUTPUT
1 VDD
The single open drain output can switch on with either a north or
south pole of sufficient strength. When the magnetic flux density (B)
perpendicular to the package is larger than operating point (Bop) the
output is switched on (pulled low). The output is turned off when
B becomes lower than the releasing point (Brp). The output will
remain off when there is no magnetic field.
Features
Omnipolar (North or South pole) Operation
Low 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 +125°C Operating Temperature
ESD (HBM) > 6KV
Small Low Profile SOT553 and Industry Standard SC59 and
SIP-3 Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
SC59
(Top View)
NC 1
GND 2
NC 3
5 OUTPUT
4 VDD
SOT553
(Front View)
SIP-3
3. OUTPUT
2. GND
1. VDD
Applications
Doors, Lids, Covers and Tray Position Detect Switches
Display Switch for Portable PCs and Tablets
On/Off Switch for PDAs and Digital Cameras
Liquid Level Detection for Coffee Machines
Smart Meters
Position, Proximity and Level Detection Contactless Switch in
Battery Powered Consumer, 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. 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.
AH1815
Document number: DS37970 Rev. 2 - 2
1 of 13
www.diodes.com
September 2015
© Diodes Incorporated
