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AH1807

Document number: DS35524 Rev. 3 - 2

1 of 13

www.diodes.com

February 2014

H1807

MEDIUM SENSITIVITY MICROPOWER

OMNIPLOAR HALL-EFFECT SWITCH

Description

The AH1807 is a medium sensitivity micropower Omnipolar Hall

Effect switch IC designed for battery powered consumer to home

appliance and industrial equipment such as smart meter magnetic

tamper detect. Based on two Hall Effect plates and a chopper

stabilized architecture, the AH1807 provides a reliable solution over

the whole operating range. To support battery and low power

applications, 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 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.

The AH1807 is available in SC59, SOT553 and SIP-3L.

Features

• Omnipolar (North or South pole) Operation

• Medium 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

• High ESD

• Small Low Profile SOT553 and Industry Standard SC59 and

SIP-3L 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

(TOP View)

SIP-3L

Applications

• Smart E-Meters

• Tamper Protection Switch

• Door, Lids and Tray Position Switch

• Proximity and Position Switches

• Level Detects

• On/Off Switch Digital Contact-Less Switch in Industrial and

Consumer Products

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.

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Sommario

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