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Diodes AH1822 User Manual

Ah1822, Applications, Ordering information

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AH1822

MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR

SWITCH

AH1822 Rev. 5

1 of 9

FEBRUARY 2009

www.diodes.com

©

Diodes Incorporated

• 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 24

μW

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

Packing

Green

7 : Tape & Reel

G : Green

Package

FT4 : DFN2015-6

FU4 : DFN3020-6


Device

Package

Code

Packaging

(Note 2)

7” Tape and Reel

Quantity

Part Number Suffix

AH1822-FT4G-7 FT4

DFN2015H4-6

3000/Tape

&

Reel

-7

AH1822-FU4G-7 FU4

DFN3020H4-6

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

.








Features

General Description