AH1815

Document number: DS37970 Rev. 2 - 2

1 of 13

www.diodes.com

September 2015

© Diodes Incorporated

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.

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)

Pin Assignments

(Top View)

1

3

2

OUTPUT

GND

SC59

(Top View)

5

4

3

2

1

NC

OUTPUT

GND

NC

SOT553

(Front View)

2. GND

3. OUTPUT

SIP-3

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.