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 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
PackingGreen
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
