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AH1822

MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH

Diodes Incorporated. 

Features

AH1822

MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR

SWITCH

General Description

• Micropower operation

• Operation with magnetic field of either north or south

pole (omnipolar)

• 2.5V to 5.5V battery operation

• Chopper stabilized

• Superior temperature stability

• Extremely Low Switch-Point Drift

• Insensitive to Physical Stress

• Good RF noise immunity

• -40°C to 85°C operating temperature

• ESD (HBM) ＞ 5KV

• DFN2015-6 and DFN3020-6: Available in “Green”

Molding Compound (No Br, Sb)

• Lead Free Finish/ RoHS Compliant (Note 1)

AH1822 is comprised of two Hall effect plates and an open-drain

output driver, mainly designed for battery-operation, hand-held

equipment (such as Cellular and Cordless Phone, PDA). The

total power consumption in normal operation is typically 24μW

with a 3V power source.

Either north or south pole of sufficient strength will turn the output

on. The output will be turned off under no magnetic field. While

the magnetic flux density (B) is larger than operating point (Bop),

the output will be turned on (low), the output is held until B is

lower than release point (Brp), then turned off.

Applications

• Cover switch in clam-shell cellular phones

• Cover switch in Notebook PC/PDA

• Contact-less switch in consumer products

Ordering Information

AH 1822 - XXX G - 7

Package

FT4 : DFN2015-6

FU4 : DFN3020-6

Green

G : Green

Packing

7 : Tape & Reel

Device

AH1822-FT4G-7

AH1822-FU4G-7

Package

Code

FT4

FU4

Packaging

(Note 2)

DFN2015H4-6

DFN3020H4-6

7” Tape and Reel

Quantity

Part Number Suffix

3000/Tape & Reel

-7

3000/Tape & Reel

-7

Notes:

1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes.

2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

http://www.diodes.com/datasheets/ap02001.pdf.

AH1822 Rev. 5

1 of 9

www.diodes.com

FEBRUARY 2009

© Diodes Incorporated

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